Neutralizing antibodies in milk and blood of lactating women vaccinated for SARS-CoV-2: a systematic review / Anticorpos neutralizantes no leite e no sangue de lactantes vacinadas para SARS-CoV-2: uma revisão sistemática

ABSTRACT Objective: To compare the presence of neutralizing antibodies against SARS-CoV-2 found in the breast milk and blood of vaccinated lactating women with those not vaccinated. Data source: The study was registered in the International Prospective Register of Systematic Reviews (PROSPERO) under CRD42021287554 and followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Cohort, case-control, and cross-sectional studies that evaluated antibodies against SARS-CoV-2 in the milk and blood of vaccinated mothers and had as control group unvaccinated mothers were eligible. Health Sciences Descriptors (DeCs), Medical Subject Headings (MeSH) and Emtree descriptors were used for the Virtual Health Library (VHL), Medical Literature Analysis and Retrieval System Online (Medline/Pubmed), and Embase databases, respectively. In the Web of Science and Scopus, the strategy was adapted. No restrictions on the publication period and language were set. Data synthesis: The search identified 233 records, of which 128 duplicates and 101 papers that did not meet the inclusion criteria were excluded. Hence, four cohort studies were eligible. Nursing mothers vaccinated with the Pfizer-BioNTech and Moderna vaccines showed antibodies against SARS-CoV-2 in their blood and breast milk. Conclusions: Vaccinated lactating women had higher levels of immunoglobulin G (IgG) and A (IgA) in serum and breast milk than unvaccinated women.

RESUMO Objetivo: Comparar a presença de anticorpos neutralizantes contra o SARS-CoV-2 no leite materno e no sangue das lactantes vacinadas em relação àquelas não vacinadas. Fontes de dados: Foi efetuado registro no International Prospective Register of Systematic Reviews — PROSPERO (CRD42021287554) e foram seguidas as diretrizes do Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). Foram elegíveis estudos de coorte, caso-controle e transversais que avaliaram anticorpos contra o SARS-CoV-2 no leite e no sangue de lactantes vacinadas e tiveram como grupo controle lactantes não vacinadas. Utilizaram-se os Descritores em Ciências da Saúde (DeCs), Medical Subject Heading (MeSH) e Emtree para as bases Biblioteca Virtual em Saúde (BVS), Medical Literature Analysis and Retrieval System Online (Medline/PubMed) e Embase, respectivamente. Na Web of Science e Scopus foi feita adaptação da estratégia. Não foram estabelecid as restrições quanto ao período de publicação e idioma. Síntese dos dados: As buscas identificaram 233 registros. Foram excluídos 128 duplicados e 101 fora dos critérios de inclusão, e quatro estudos de coorte foram elegíveis. As lactantes vacinadas com Pfizer-BioNTech e Moderna apresentaram anticorpos contra SARS-CoV-2 no sangue e no leite materno. Conclusões: As mulheres lactantes vacinadas apresentaram níveis mais elevados de imunoglobulina G (IgG) e A (IgA) no soro e no leite materno em comparação com as mulheres não vacinadas.

Postbióticos: un nuevo miembro en la familia de los bióticos / Postbiotics: A new member in the biotics family

Los postbióticos fueron definidos en 2021 por la Asociación Científica Internacional de Probióticos y Prebióticos (ISAPP) como "una preparación de microorganismos inanimados y/o sus componentes celulares capaces de conferir un efecto benéfico al hospedador". El campo de los postbióticos es un área nueva dentro de la familia de los bióticos; se han desarrollado ya numerosos productos con aplicaciones clínicas, como la estimulación inmunológica, el manejo de diarreas en niños y adultos, el abordaje del intestino irritable, además de tres fórmulas infantiles. En particular, las fórmulas infantiles con postbióticos obtenidos a partir de la fermentación de la leche con Bifidobacterium breve C50 y Streptococcus thermophilus O65, y sus metabolitos, incluido el oligosacárido 3'-GL, han demostrado seguridad y contribución al desarrollo de la microbiota intestinal y el sistema inmune asociado al intestino. Estas modificaciones contribuyen a la prevención y el manejo de los trastornos funcionales digestivos del lactante.

Postbiotics were defined in 2021 by the International Scientific Association for Probiotics and Prebiotics (ISAPP) as a "preparation of inanimate microorganisms and/or their cellular components that confers a health benefit to the host." The field of postbiotics is a new area within the biotics family; numerous products have already been developed for clinical applications, such as immune stimulation, the management of diarrhea in children and adults, the management of irritable bowel syndrome, and 3 infant formulas. In particular, infant formulas with postbiotics obtained from milk fermented with Bifidobacterium breve C50 and Streptococcus thermophilus O65 ­and their metabolites­, including the oligosaccharide 3'-GL, have demonstrated to be safe and to contribute to the development of the gut microbiota and the gutassociated immune system. These modifications help to prevent and manage functional gastrointestinal disorders in infants.

Feeding premature babies in the neonatology department of the Androva Mahajanga Hospital

Background: The initiation and progression of enteral nutrition in premature infants remains a challenge. The aim of this study was to evaluate enteral nutritional management in premature infants in the neonatology department at the mother and child complex Androva Mahajanga.Methods: This was a retrospective descriptive study over a 7-month period, from January to July 2018. All neonates under 37SA who received enteral feeding were included.Results: During the study period, 74 newborns were able to receive enteral feeding. The mean age of onset of enteral feeding was 10.6 hours. In 89.2% of cases, enteral feeding was started within the first 24 hours of life. On average, the initial quantity administered was 28.4ml/kg/d. Human milk was used most frequently (54.8%). The presence of residue was the most frequently encountered incident (31.5%). Ulcero-necrotizing enterocolitis occurred in 7 newborns (9.5%). Forty-five newborns had a good outcome, with an average weight gain of 9.28 g/kg/d.Conclusions: The implementation of a nutritional management protocol for newborns, especially premature babies, in the neonatology department would be beneficial for a better outcome and growth of the baby.

Partial purification of linoleic acid isomerase enzyme from Lactobacillus paracasei bacteria isolated from milk / Purificação parcial da enzima isomerase do ácido linoleico da bactéria Lactobacillus paracasei isolada do leite

Conjugated Linoleic Acid (CLA) has attracted the attention of many researchers, especially that of microbial origin due to its biological importance to the consumer. The current study aims to extract LA Isomerase enzyme from Lactobacillus paracasei bacteria from milk and to use the enzyme in the production of CLA. Selective media, including MRS and MRS-Dagatose, were used in isolating local strains. The selected bacterial isolates were tested for their ability to produce LA-Isomerase enzyme. The isolate with high enzymatic activity was selected. After extraction and partial purification of the enzyme, the optimal conditions for the production of conjugated fatty acid were studied, and the reaction products were diagnosed using GC-MS technology. It was found that 11 isolates have the ability to produce CLA at different concentrations, H1 isolate showed the highest production of conjugated fatty acid at a concentration of 120.45 g.ml-1, this isolate was selected as the source for enzyme extraction. The enzymatic activity of the crude extract and partially purified with ammonium sulfate was estimated using color methods at wavelength of 233 nm. The effect of the optimum conditions (pH, temperature, linoleic acid concentration and enzyme concentration) on the CLA product was studied using the partially purified LA Isomerase enzyme, the optimum conditions for production were 6.5, 45 °C, 100 µg.ml-1 and 0.7 ml, respectively. The GC-MS technique showed the presence of a number of reaction products that are isomers of conjugated linoleic acid (C9T11, T9T12, T10C12) with different concentrations.

O Ácido Linoleico Conjugado (CLA) tem chamado a atenção de diversos pesquisadores, principalmente aquele de origem microbiana, devido à sua importância biológica para o consumidor. O presente estudo visa extrair a enzima LA Isomerase da bactéria Lactobacillus paracasei do leite e usar essa enzima na produção de CLA. Meios seletivos, incluindo MRS e MRS-Dagatose, foram usados no isolamento de cepas locais. Os isolados bacterianos selecionados foram testados quanto à sua capacidade de produzir a enzima LA-Isomerase. Foi selecionado o isolado com alta atividade enzimática. Após a extração e purificação parcial da enzima, as condições ideais para a produção de ácido graxo conjugado foram estudadas e os produtos da reação foram identificados usando a tecnologia GC-MS. Verificou-se que 11 isolados possuem capacidade de produzir CLA em diferentes concentrações. O isolado H1 apresentou a maior produção de ácido graxo conjugado, na concentração de 120,45 g.ml-1, e este isolado foi selecionado como fonte para extração enzimática. A atividade enzimática do extrato bruto e parcialmente purificado com sulfato de amônio foi estimada por métodos de coloração em comprimento de onda de 233 nm. O efeito das condições ótimas (pH, temperatura, concentração de ácido linoleico e concentração de enzima) no produto CLA foi estudado usando a enzima LA Isomerase parcialmente purificada e as condições ótimas para produção foram 6,5, 45 °C, 100 µg.ml-1 e 0,7 mL, respectivamente. A técnica de GC-MS mostrou a presença de uma série de produtos de reação que são isômeros do ácido linoleico conjugado (C9T11, T9T12, T10C12) com diferentes concentrações.

Partial purification of linoleic acid isomerase enzyme from Lactobacillus paracasei bacteria isolated from milk

Abstract Conjugated Linoleic Acid (CLA) has attracted the attention of many researchers, especially that of microbial origin due to its biological importance to the consumer. The current study aims to extract LA Isomerase enzyme from Lactobacillus paracasei bacteria from milk and to use the enzyme in the production of CLA. Selective media, including MRS and MRS-Dagatose, were used in isolating local strains. The selected bacterial isolates were tested for their ability to produce LA-Isomerase enzyme. The isolate with high enzymatic activity was selected. After extraction and partial purification of the enzyme, the optimal conditions for the production of conjugated fatty acid were studied, and the reaction products were diagnosed using GC-MS technology. It was found that 11 isolates have the ability to produce CLA at different concentrations, H1 isolate showed the highest production of conjugated fatty acid at a concentration of 120.45 g.ml-1, this isolate was selected as the source for enzyme extraction. The enzymatic activity of the crude extract and partially purified with ammonium sulfate was estimated using color methods at wavelength of 233 nm. The effect of the optimum conditions (pH, temperature, linoleic acid concentration and enzyme concentration) on the CLA product was studied using the partially purified LA Isomerase enzyme, the optimum conditions for production were 6.5, 45 °C, 100 g.ml-1 and 0.7 ml, respectively. The GC-MS technique showed the presence of a number of reaction products that are isomers of conjugated linoleic acid (C9T11, T9T12, T10C12) with different concentrations.

Resumo O Ácido Linoleico Conjugado (CLA) tem chamado a atenção de diversos pesquisadores, principalmente aquele de origem microbiana, devido à sua importância biológica para o consumidor. O presente estudo visa extrair a enzima LA Isomerase da bactéria Lactobacillus paracasei do leite e usar essa enzima na produção de CLA. Meios seletivos, incluindo MRS e MRS-Dagatose, foram usados no isolamento de cepas locais. Os isolados bacterianos selecionados foram testados quanto à sua capacidade de produzir a enzima LA-Isomerase. Foi selecionado o isolado com alta atividade enzimática. Após a extração e purificação parcial da enzima, as condições ideais para a produção de ácido graxo conjugado foram estudadas e os produtos da reação foram identificados usando a tecnologia GC-MS. Verificou-se que 11 isolados possuem capacidade de produzir CLA em diferentes concentrações. O isolado H1 apresentou a maior produção de ácido graxo conjugado, na concentração de 120,45 g.ml-1, e este isolado foi selecionado como fonte para extração enzimática. A atividade enzimática do extrato bruto e parcialmente purificado com sulfato de amônio foi estimada por métodos de coloração em comprimento de onda de 233 nm. O efeito das condições ótimas (pH, temperatura, concentração de ácido linoleico e concentração de enzima) no produto CLA foi estudado usando a enzima LA Isomerase parcialmente purificada e as condições ótimas para produção foram 6,5, 45 °C, 100 g.ml-1 e 0,7 mL, respectivamente. A técnica de GC-MS mostrou a presença de uma série de produtos de reação que são isômeros do ácido linoleico conjugado (C9T11, T9T12, T10C12) com diferentes concentrações.

Nutritional composition of human milk and its association with maternal and perinatal factors / Composição nutricional do leite humano e sua associação com fatores maternos e perinatais

ABSTRACT Objective: The objective of this study was to evaluate the influence of maternal and perinatal factors on the nutritional composition of human milk. Methods: A cross-sectional study was conducted between November 2018 and January 2020, with 181 donors selected in Tertiary Health Units of the Unified Health System — from one collection station and five Human Milk Banks. Data were collected through a standardized questionnaire. To be fit to be a donor in a Human Milk Banks and produce mature milk were the eligibility criteria to participate in the study. We excluded milk samples with Dornic acidity above 8° D. The dependent variables were the macronutrients of human milk (i.e., carbohydrates, proteins, lipids, and total energy), that were analyzed using spectroscopy with the Miris Human Milk Analyzer™. The maternal and perinatal factors were the independent variables. Results: Women with pre-gestational obesity and gestational weight gain above the recommendation showed a lower protein concentration compared to eutrophic women (median=0.8, interquartile range (IQR): 0.7-0.9 vs. median=0.8, and IQR: 0.8-1.0) and those with adequate gestational weight gain (median=0.8, IQR: 0.7-0.9 vs. median=0.9, and IQR: 0.8-1.0), respectively. The other analyzed factors (i.e., maternal habits, comorbidities, and perinatal factors) were not associated with the nutritional composition of human milk. Conclusions: The assessment of factors associated with the nutritional composition of human milk is extremely important to assist postpartum care. Pre-gestational obesity and inadequate gestational weight gain were the only factors statistically associated with the nutritional composition of human milk as they impacted its protein content.

RESUMO Objetivo: Avaliar a influência de fatores maternos e perinatais na composição nutricional do leite humano. Métodos: Estudo transversal, realizado entre novembro de 2018 e janeiro de 2020, com 181 doadoras selecionadas em Unidades Terciárias de Saúde do Sistema Único de Saúde de um Posto de Coleta e cinco Bancos de Leite Humano. Foram coletados dados das variáveis maternas e dos recém-nascidos por meio de questionário padronizado. Estar apta para ser doadora em um Banco de Leite Humano e produzir leite maduro foram os critérios de elegibilidade para participar do estudo. As amostras de leite com acidez Dornic acima de 8° D foram excluídas. Os macronutrientes do leite humano, variáveis dependentes (carboidratos, proteínas, lipídeos, energia total) foram analisados pela técnica de espectroscopia de transmissão no infravermelho médio com o Miris Human Milk Analyzer™. Os fatores maternos e perinatais foram as variáveis independentes. Resultados: Mulheres com obesidade pré-gestacional e ganho de peso gestacional acima do recomendado apresentaram menor concentração proteica em relação às eutróficas (mediana=0,8, intervalo interquartil [IQR]: 0,7-0,9 vs. mediana=0,8, IQR: 0,8-1,0) e aquelas com ganho de peso gestacional adequado (mediana=0,8, IQR: 0,7-0,9 vs. mediana=0,9, IQR: 0,8-1,0), respectivamente. Os demais fatores analisados (hábitos maternos, comorbidades, fatores perinatais) não se associaram com a composição nutricional do leite humano. Conclusões: A avaliação dos fatores associados à composição nutricional do leite humano é de extrema importância para auxiliar os cuidados pós-parto. A obesidade pré-gestacional e o ganho de peso gestacional inadequado foram os únicos fatores estatisticamente associados com a composição nutricional do leite humano por terem impactado o seu teor de proteína.

Determinantes da doação de leite humano: dados de mulheres doadoras em um banco de leite / Determinantes de la donación de leche humana: datos de mujeres donantes en un banco de leche / Determinants of human milk donation: data from women donors at a milk bank

Resumo Objetivo Analisar as variáveis sociodemográficas das mulheres doadoras cadastradas em um Banco de Leite Humano associadas com o volume de leite doado. Método Foram coletados dados sociodemográficos de doadoras domiciliares cadastradas, bem como características de aleitamento entre 2017 e 2020 no Banco de Leite Humano do Hospital Universitário da Universidade Federal do Maranhão, São Luís. O volume de leite doado foi utilizado como variável de desfecho sendo analisada sua associação com as demais variáveis expositivas. Resultados Ao final do estudo, 619 doadoras tiveram as fichas analisadas (N = 5253). A mediana de volume doado foi de 1.285 ml (IQ 300 - 3570ml). A idade materna, a amamentação exclusiva e a idade do bebê foram as características que demonstraram associação com o volume de leite doado (p < 0,05). Conclusão e Implicações para a Prática: Na amostra estudada, as idades materna e do bebê e a prática de aleitamento exclusivo estiveram associados com o volume de leite doado. O conhecimento dos fatores socioeconômicos das doadoras de leite humano e a sua relação com o volume de leite doado podem subsidiar o desenvolvimento de ações para o aumento de volume de leite distribuído ao recém-nascido prematuros.

Resumen Objetivo Identificar las variables sociodemográficas de las mujeres inscriptas como donantes de leche en un Banco de Leche Humana y evaluar su asociación con el volumen de leche donado. Método Se recopilaron datos sociodemográficos de las donantes domiciliarias inscriptas como también las características de la lactancia materna entre 2017 y 2020 en el Banco de Leche Humana del Hospital Universitario de la Universidad Federal de Maranhão, São Luís. El volumen de leche donada se utilizó como variable de resultado y se analizó su asociación con otras variables de exposición. Resultados Al final del estudio, se analizaron los registros de 619 donantes. El volumen promedio donado fue de 1.285 ml (RIQ 300 - 3.570 ml). La edad materna, la lactancia materna exclusiva y la edad del bebé fueron las características que mostraron una asociación con el volumen de leche donado (p <0,05). Conclusión e Implicaciones para la Práctica: En la muestra estudiada, las edades maternas e infantiles y la lactancia materna exclusiva se asociaron con el volumen de leche donado. El conocimiento de los factores socioeconómicos de las donantes de leche materna y su relación con el volumen de leche donado puede respaldar el desarrollo de acciones para aumentar el volumen de leche distribuido a recién nacidos prematuros.

Abstract Objective To analyze the sociodemographic variables of women registered as milk donors at a Human Milk Bank and assess their association with the volume of milk donated. Method Sociodemographic data was collected from registered home donors, as well as breastfeeding characteristics between 2017 and 2020 at the Human Milk Bank of the University Hospital of the Federal University of Maranhão, São Luís. The volume of donated milk served as the outcome variable and its association with other exposure variables were analyzed. Results At the end of the study, a total of 619 donors had their records analyzed. The median volume donated was 1,285 ml (IQR 300 - 3,570 ml). Maternal age, exclusive breastfeeding, and the baby's age were the characteristics that showed an association with the volume of milk donated (p <0.05). Conclusion and Practice Implications In the studied sample, maternal and infant age and exclusive breastfeeding practice were associated with the volume of milk donated. Knowledge of the sociodemographic factors of human milk donors and their relationship with the volume of milk donated can support the development of actions to increase the volume of milk distributed to premature newborns.

Escenarios lácteos y microbiota intestinal en los primeros 1000 días / Milk scenarios and gut microbiota in the first 1000 days of life

La leche humana es el estándar de oro para la nutrición del bebé y debe iniciarse en la primera hora de vida. La leche de vaca, de otros mamíferos o las bebidas vegetales no se deben ofrecer antes del año de vida. Sin embargo, algunos niños requieren, al menos en parte, de fórmulas infantiles. Aun con las sucesivas mejoras a lo largo de la historia mediante la incorporación de oliogosacáridos, probióticos, prebióticos, sinbióticos y postbióticos, las fórmulas infantiles siguen siendo perfectibles para reducir la brecha de salud entre los bebés amamantados y aquellos alimentados con fórmula. En este sentido, se espera que la complejidad de las fórmulas siga aumentando a medida que se conozca mejor cómo modular el desarrollo de la microbiota intestinal. El objetivo de este trabajo fue realizar una revisión no sistemática del efecto de los diferentes escenarios lácteos sobre la microbiota intestinal.

Human milk is the gold standard for infant nutrition, and breastfeeding should be started within the first hour of life. Cow's milk, other mammalian milk, or plant-based beverages should not be offered before 1 year of age. However, some infants require, at least in part, infant formulas. Even with subsequent enhancements throughout history, with the addition of oligosaccharides, probiotics, prebiotics, synbiotics, and postbiotics, infant formulas still have room for improvement in reducing the health gap between breastfed and formula-fed infants. In this regard, the complexity of infant formulas is expected to continue to increase as the knowledge of how to modulate the development of the gut microbiota is better understood. The objective of this study was to perform a non-systematic review of the effect of different milk scenarios on the gut microbiota.

Donation of women's milk to the neonatology department at the Androva hospital in Mahajanga

Background: The functioning of a milk bank begins with the donation of milk from women donors. The objective of our study was to describe the demographic profile of mothers who donate milk and their practice of donating milk in the neonatology department at the hospital Center Androva Mahajanga.Methods: This is a prospective, descriptive study over a 7-month period, from August 2019 to February 2020. Were included all healthy breastfeeding women who agreed to donate excess breast milk.Results: The participation rate of breastfeeding women in milk donation was 6.6%. Vaginal delivery was the most common (85.9%). The majority had no knowledge about milk donation (83.8%). Manual breast pumping was the most used (43.8%). The average total amount of milk collected by a mother from the beginning to the end of the donation was 613 ml. The average duration of donation by a mother was 6.4 days.Conclusions: The participation and knowledge of mothers on the donation of women's milk was low, although it can improve the survival of newborns.

Análisis de posibles peligros en leche materna donada. Revisión / Analysis of potential hazards in donated breast milk. Review

La leche materna donada es un recurso de alto valor que puede ser utilizado para la alimentación de neonatos hospitalizados y a término, por tanto, garantizar su inocuidad es imperativo. Esta revisión de literatura reúne los principales peligros de naturaleza física, química y microbiológica identificados en leche materna, con la intención de proveer una referencia que los consolide de tal forma que la información pueda ser utilizada por bancos de leche humana, gobiernos y agencias regulatorias para establecer mecanismos para su prevención y control. Se realizó una revisión de literatura entre agosto del 2021 y octubre del 2022, utilizando buscadores y descriptores específicos para peligros de transmisión alimentaria en leche materna. Se incluyeron estudios publicados en español o en inglés. Se identificaron 31 agentes biológicos patógenos incluyendo bacterias, virus y parásitos. Como peligros químicos se reportaron medicamentos, drogas, cafeína, infusiones herbales, micotoxinas, alérgenos, especias, suplementos nutricionales, contaminantes ambientales y desinfectantes. Se alerta sobre la presencia potencial de plástico y vidrio de tamaño menor a 7 mm proveniente del ambiente de extracción y recipientes. La presencia de peligros microbiológicos y químicos en leche materna puede darse por transmisión vertical, temperaturas inadecuadas durante el almacenamiento y contaminación en el proceso. La presencia de peligros físicos se relaciona con la manipulación de los implementos en etapas posteriores a la extracción. Se requiere prestar atención a los hábitos de la madre para prevenir peligros químicos, así como más investigación relacionada con micotoxinas en leche materna(AU)

Donated breast milk is a highvalue resource which can be used to feed hospitalized neonates and full-term infants, therefore, ensuring its safety is imperative. This literature review presents the main hazards of physical, chemical and microbiological nature identified in human milk, with the intention of providing a reference that consolidates the reported hazards reported, so the information can be used by human milk banks, governments and regulatory agencies to establish prevention and control mechanisms. A literature review was carried out between August 2021 and October 2022, using search engines and specific descriptors for foodborne hazards in breast milk. Studies published in Spanish and English were considered. 31 pathogenic biological agents including bacteria, viruses and parasites were identified. Medications, drugs, caffeine, herbal infusions, mycotoxins, allergens, spices, nutritional supplements, contaminants of environmental origin and disinfectants were reported as chemical hazards. No physical hazards were identified, however the potential presence of plastic and glass smaller than 7 mm from the extraction environment or containers is alerted. Presence of microbiological and chemical hazards can be due to vertical transmission, inadequate temperature of storing, contamination during extraction, packaging, and infant feeding. Whereas presence of physical hazards is related to implements handling after extraction. Attention to hygiene and habits of the mother to prevent chemical hazards and further research related to mycotoxins in human milk is required(AU)

Experiencias alrededor de la indicación nutricional para prematuros en instituciones con Bancos de Leche Humana / Experiences around the nutritional indication for premature infants in institutions with Human Milk Banks

RESUMEN Objetivo Caracterizar, desde las experiencias propias, las dinámicas de la interacción entre los profesionales vinculados a la Unidad de Cuidados Intensivos Neonatales de Hospitales Públicos de Colombia y la estrategia de Bancos de Leche Humana en torno a la alimentación de los prematuros. Método Estudio cualitativo con enfoque fenomenológico interpretativo, en el que participaron 43 profesionales de la salud de 8 Instituciones Prestadoras de Salud que cuentan con Unidad de Cuidado Intensivo Neonatal y Banco de Leche Humana en Colombia. Resultados Las dinámicas de interacción entre los profesionales de la salud de las Unidades de Cuidados Intensivos Neonatales y los Bancos de Leche Humana relacionadas con la alimentación de los prematuros están mediadas por prácticas que vinculan competencias, materialidades y sentidos atravesados por la utilización o no de la leche humana en el tratamiento de los mismos. Discusión La disponibilidad de Bancos de Leche Humana en instituciones prestadoras de salud que brindan atención a recién nacidos prematuros posibilita la existencia y el despliegue de unas indicaciones nutricionales para esta población que van en línea con los protocolos diseñados para su tratamiento. Sin embargo, las decisiones tomadas en esta interacción están matizadas por debates que van surgiendo en el proceso, los cuales, lejos de ser una barrera para el uso de los Bancos de Leche Humana, se convierten en herramientas de vital importancia en la construcción de conocimiento en lo que respecta a la práctica de alimentación de los recién nacidos prematuros y la valoración de la estrategia.

ABSTRACT Objective To characterize from their own experiences the dynamics of the interaction between the professionals linked to the Neonatal Intensive Care Unit of Public Hospitals in Colombia and the Human Milk Bank strategy regarding the feeding of premature infants. Methods Qualitative study with an interpretative phenomenological approach, in which 43 health professionals from 8 health care institutions with Neonatal Intensive Care Unit and Human Milk Bank in Colombia participated. Results The dynamics of interaction between health professionals in Neonatal Intensive Care Units and Human Milk Banks related to the feeding of premature infants are mediated by practices that link competencies, materialities and meanings which are crossed by the use or not of human milk in the treatment of premature infants. Discussion The availability of Human Milk Banks in health care institutions that pro-vide care to premature newborns makes possible the existence and development of nutritional indications for this population that are in line with the protocols designed for their treatment. However, the decisions taken in this interaction are tinged by some debates that arise in the process, which far from being a barrier to the use of Human Milk Banks, become tools of vital importance in the construction of knowledge regarding the feeding practice of preterm newborns and the assessment of the strategy.

Factores modificables asociados a la pérdida de donantes en un banco de leche humana / Modifiable factors associated with loss of donors in a human milk bank

RESUMEN Objetivo Identificar los factores asociados al aumento del riesgo de perder donantes de leche humana (LH) en el banco de leche humana (BLH) del Hospital General de Medellín (HGM), Colombia durante 2014-2019. Metodología Se evaluaron 559 mujeres que contactaron al BLH para ser donantes de LH entre 2014-2019 según su clasificación como contacto apto o no apto para la donación. Se usó un modelo de regresión logística para analizar las variables asociadas a la clasificación de un contacto como no apto. Resultados Del total de contactos que recibió el BLH, 8,8% (n=49) fueron clasificados como no aptos. Al comparar con los aptos, los contactos no aptos tuvieron 1,8 años menos de edad, el doble pertenecía a la modalidad exclusiva, el mayor porcentaje tenía leche de madre de prematuro o calostro, todos fueron clasificados como no aptos en los primeros años de funcionamiento del BLH, no contaban con una prueba diagnóstica para infecciones de transmisión sexual (ITS) durante el último año y 22,9% más tuvo diagnóstico de anemia en la gestación (P<0,05). Contactar al BLH entre 2014-2016 (OR=3,08; P=0,004) y pertenecer a la modalidad de donación exclusiva (OR=3,11; P=0,004), incrementó el riesgo de ser clasificado como contacto no apto para donar LH al BLH. La ausencia de una prueba diagnóstica de VIH y la presencia anemia fueron considerados factores de exclusión. Conclusión Factores modificables incrementaron el riesgo de que una mujer con intención de donar LH al BLH no pudiera hacerlo. Identificarlos e intervenirlos permitiría incrementar el número de donadoras de los BLH.

ABSTRACT Objective To identify factors associated with the increased risk of loss of human milk donors (HM) to the milk bank (MB) of the Hospital General de Medellín (HGM) between 2014 and 2019. Methodology A total of 559 women who contacted the MB to be HM donors between 2014 and 2019 were evaluated according to their classification as contact eligible or ineligible to donate. A logistic regression model was used to identify the variables associated with the classification of a contact as ineligible. Results A total of 8.8% (n=49) of contacts were classified as ineligible. Ineligible contacts were 1.8 years older, with twice as many being exclusive donation method users. A higher percentage of ineligible contacts produced milk from preterm babies or colostrum. A higher percentage were classified as ineligible during the first years of the MB's operation, and a higher percentage had not undergone diagnostic tests for sexually transmitted infections in the last year. Additionally, 22.9% had been diagnosed with anemia during gestation (P<0.05). Contacting the MB between 2014-2016 (OR=3.08; P=0.004) and being from the exclusive donation method (OR=3.11; P=0.004) increased the risk of being classified as an ineligible contact. The absence of an HIV diagnostic test and a diagnosis of anemia during gestation were considered exclusion factors. Conclusion Modifiable factors increased the risk of a contact being classified as ineligible to donate human milk, identifying and treating them would allow increasing the number of HM donors to a MB.

Multicellular coupling fermentation for 3'-sialyllactose conversion using N-acetyl-glucosamine and lactose / 生物工程学报

Sialyllactose is one of the most abundant sialylated oligosaccharides in human milk oligosaccharides (HMOs), which plays an important role in the healthy development of infants and young children. However, its efficient and cheap production technology is still lacking presently. This study developed a two-step process employing multiple-strains for the production of sialyllactose. In the first step, two engineered strains, E. coli JM109(DE3)/ pET28a-BT0453 and JM109(DE3)/pET28a-nanA, were constructed to synthesize the intermediate N-acetylneuraminic acid. When the ratio of the biomass of the two engineered strains was 1:1 and the reaction time was 32 hours, the maximum yield of N-acetylneuraminic acid was 20.4 g/L. In the second step, E. coli JM109(DE3)/ pET28a-neuA, JM109(DE3)/ pET28a-nst and Baker's yeast were added to the above fermentation broth to synthesize 3'-sialyllactose (3'-SL). Using optimal conditions including 200 mmol/L N-acetyl-glucosamine and lactose, 150 g/L Baker's yeast, 20 mmol/L Mg2+, the maximum yield of 3'-SL in the fermentation broth reached 55.04 g/L after 24 hours of fermentation and the conversion rate of the substrate N-acetyl-glucosamine was 43.47%. This research provides an alternative technical route for economical production of 3'-SL.

Effects of different breast milk fortifier methods on growth and development of preterm infants: a meta-analysis / 中国新生儿科杂志

Objective:To evaluate the impact of different methods of human milk fortifier (HMF) on the growth and development of preterm infants.Methods:Computer searches were conducted in PubMed, Embase, Clinicaltrials, Cochrane Library, China National Knowledge Infrastructure, Wanfang Data, VIP Database, and China National Full-text Database for biomedical literature from database inception to December 1, 2022. The inclusion criteria encompassed randomized controlled studies (RCTs) involving infants with a gestational age of less than 37 weeks who were subjected to HMF. The quality of included studies was assessed using the Cochrane bias analysis tool. Meta-analyses were performed using RevMan 5.3 software to compare individual fortification with standard fortification, targeted fortification with adjusted fortification of breast milk, and their effects on preterm infant weight gain, length, head circumference growth rates, as well as the incidence of bronchopulmonary dysplasia, osteopenia, feeding intolerance, and necrotizing enterocolitis.Results:A total of 11 RCTs were included, with 10 having low to moderate bias risk and 1 having a high bias risk. The results of meta-analysis showed that compared to standard fortification, individual fortification led to an increase in the weight gain rate of preterm infants ( SMD=0.87,95% CI 0.36-1.38 ,P<0.001), with no statistically significant differences observed in the effects on length and head circumference growth rates ( SMD=0.64,95% CI -0.07-1.34, P=0.08; SMD=0.58, 95% CI -0.06-1.22, P=0.08). The incidence of feeding intolerance and necrotizing enterocolitis in the individual intensive group was lower than that in the standard intensive group ( RR=0.45, 95% CI 0.22-0.89, P=0.02; RR=0.32, 95% CI 0.13-0.78, P=0.01), but no statistically significant difference in the incidence of bronchopulmonary dysplasia ( RR=0.93, 95% CI 0.76-1.20, P=0.67). Only two studies compared targeted fortification with adjusted fortification for growth and development outcomes in preterm infants, but the results were not consistent. Only one RCT showed no statistically significant difference in the incidence of osteopenia between the targeted fortification and adjusted fortification groups. Conclusions:Compared with standard fortification, individual intensive breastfeeding appears to promote the early growth and development of preterm infants. However, the effect of targeted and adjustable fortification on the growth and development of preterm infants is not significantly different.

Temperature curve of raw human milk heated by different methods: experimental study / Curva de temperatura de la leche humana cruda sometida a calentamiento por diferentes métodos: estudio experimental / Curva de temperatura do leite humano cru submetido à aquecimento por diferentes métodos: estudo experimental

ABSTRACT Objective: To analyze the temperature curve of raw or pasteurized human milk exposed to different heating methods. Method: Experiments with volumes of 5 ml to 100 ml of human milk were carried out between 2016 and 2021 and analyzed according to the exposure time by different heating methods. Descriptive statistics included the calculation of means, medians, minimum and maximum values, measures of dispersion and standard deviation. Results: The thermal curve made it possible to identify the heating of human milk close to body temperature when subjected to a water bath and microwaves. Milk exposed to room temperature (21°C) was unable to reach this temperature. When heated in a water bath at 40°C, smaller volumes reached body temperature between 3 and 5 minutes, while in a microwave at 50% power, practically all volumes reached temperature. Conclusion: The temperature curves of raw or pasteurized human milk were constructed, and it was possible to verify its behavior using different heating methods for administering the food in a neonatal intensive care unit, considering the volume, type and time of heating and temperature.

RESUMEN Objetivo: Analizar la curva de temperatura de la leche humana cruda o pasteurizada expuesta a diferentes métodos de calentamiento. Método: Se realizaron experimentos con volúmenes de 5 ml a 100 ml de leche humana entre 2016 y 2021 y se analizaron en función del tiempo de exposición mediante diferentes métodos de calentamiento. La estadística descriptiva incluyó el cálculo de medias, medianas, valores mínimos y máximos, medidas de dispersión y desviación estándar. Resultados: La curva térmica permitió identificar el calentamiento de la leche humana próximo a la temperatura corporal cuando se sometió a baño maría y microondas. La leche expuesta a temperatura ambiente (21°C) fue incapaz de alcanzar esta temperatura. Cuando se calentó en un baño de agua a 40°C, los volúmenes más pequeños alcanzaron la temperatura corporal entre 3 y 5 minutos, mientras que en un microondas al 50% de potencia, prácticamente todos los volúmenes alcanzaron la temperatura. Conclusión: Se construyeron las curvas de temperatura de la leche humana cruda o pasteurizada y se pudo comprobar su comportamiento utilizando diferentes métodos de calentamiento para administrar el alimento en una unidad de cuidados intensivos neonatales, teniendo en cuenta el volumen, el tipo y el tiempo de calentamiento y la temperatura.

RESUMO Objetivo: Analisar a curva de temperatura do leite humano cru ou pasteurizado exposto a diferentes métodos de aquecimento. Método: Experimentos com volumes de 5 ml a 100 ml de leite humano foram realizados entre 2016 e 2021 e analisados segundo o tempo de exposição por diferentes métodos de aquecimento. A estatística descritiva incluiu o cálculo das médias, medianas, valores mínimos e máximos, medidas de dispersão e desvio padrão. Resultados: A curva térmica permitiu identificar o aquecimento do leite humano próximo da temperatura corporal quando submetidos a banho-maria e micro-ondas. O leite exposto à temperatura ambiente (21°C) não foi capaz de atingir tal temperatura. No aquecimento em banho-maria a 40°C, volumes menores alcançaram a temperatura corporal entre 3 e 5 minutos, enquanto em micro-ondas na potência de 50%, praticamente todos os volumes alcançaram essa temperatura. Conclusão: As curvas de temperatura do leite humano cru ou pasteurizado foram construídas, sendo possível verificar o seu comportamento mediante diferentes métodos de aquecimento para administração do alimento em unidade de terapia intensiva neonatal, considerando o volume, tipo e tempo de aquecimento e temperatura.

Process of donating human milk from the milk bank in the city of Petrolina, PE / Processo de doação de leite humano do banco de leite da cidade de Petrolina-PE

Abstract Objectives: to analyze the donation of human milk at the Banco de Incentivo e Apoio a Amamentação (BIAMA) (Breastfeeding Incentive and Support Bank) from 2018 to 2020. Methods: normative assessment, descriptive and exploratory character, with a quantitative approach and focus on the Donabedian Model. Study with a locus at BIAMA at Dom Malan Hospital, in the city of Petrolina-PE, based on registrations from the online platform of the Rede Brasileira de Bancos de Leite Humano (Brazilian Network of Human Milk Banks), with data from BIAMA from 2018 to 2020 and field activities. Results: in 2020, there was a decrease in the number of group assistance and medical consultations, in contrast to the increase in nursing consultations. Most of the milk supply comes from the external public, and in 2020 there was a reduction number of donors and in the volume of human milk collected. Conclusions: COVID-19 pandemic had a negative impact on BIAMA activities and on milk donation, however, the use of new means of communication for patient care was observed. Even so, new donor recruitment strategies must be implemented. Regarding the main norms that regulate the operation of Human Milk Banks, most of the items listed are obeyed by BIAMA.

Resumo Objetivos: analisar a doação de leite humano no Banco de Incentivo e Apoio a Amamentação (BIAMA) no período de 2018 a 2020. Métodos: avaliação normativa, de caráter descritivo e exploratório, com abordagem quantitativa e enfoque no Modelo Donabedian. Estudo com lócus no BIAMA do Hospital Dom Malan, na cidade de Petrolina-PE, a partir de registros da plataforma online da Rede Brasileira de Bancos de Leite Humano, com dados do BIAMA de 2018 a 2020 e atividades de campo. Resultados: em 2020, houve um decréscimo no número de atendimentos em grupo e de consultas médicas, em contrapartida, ao aumento das consultas de enfermagem. A maior parte do abastecimento de leite advém do público externo, e em 2020 foi observado uma redução no número de doadoras e no volume de leite humano coletado. Conclusões: a pandemia de COVID-19 repercutiu de forma negativa em atividades do BIAMA e na doação de leite, no entanto, foi observado a utilização de novos meios de comunicação para atendimento dos pacientes. Ainda assim, novas estratégias para recrutamento de doadoras devem ser implementadas. Em relação às principais normas que regulamentam o funcionamento de Bancos de Leite Humano, a maioria dos itens elencados são obedecidos pelo BIAMA.

Evaluation of the implementation of human milk supply for prematures in a neonatal intensive care unit / Avaliação da implantação do fornecimento de leite humano para prematuros em unidade de terapia intensiva neonatal

Abstract Objectives: to assess the supply of human milk exclusively to prematures in a Neonatal Intensive Care Unit and the influence of external and organizational contexts on the degree of implementation of this intervention. Methods: this is an implementation evaluation with analysis of the external context (sociodemographic situation of mothers, support network and industry marketing) and organizational context (belonging to the hospital unit). To define the degree of implementation, the Analysis and Judgment Matrix was used, considering the compliance dimension, and the availability and technical-scientific quality sub-dimensions. The data used were obtained through interviews, semi-structured questionnaires and analysis of documents from the institution. Results: the degree of implementation of the intervention was 80.74%, proving to be satisfactory, with emphasis on the technical-scientific quality sub-dimension. Conclusions: the success in the supply of human milk is linked to public policies, the support and guidance offered to mothers in the hospital unit, presence of a support network, knowledge of mothers about the benefits of breastfeeding, adequate infrastructure and availability of supplies. The prematures being hospitalized in a child-friendly hospital contributed to the implementation of the intervention.

Resumo Objetivos: avaliar o fornecimento de leite humano de forma exclusiva aos prematuros em uma Unidade de Terapia Intensiva Neonatal e a influência dos contextos externo e organizacional no grau de implantação dessa intervenção. Métodos: trata-se de uma avaliação de implantação com análise dos contextos externo (situação sociodemográfico das mães, rede de apoio e marketing da indústria) e organizacional (pertencente à unidade hospitalar). Para definir o grau de implantação, foi utilizada a Matriz de Análise e Julgamento, considerando a dimensão conformidade, e as subdimensões disponibilidade e qualidade técnico-científica. Os dados utilizados foram obtidos por meio de entrevistas, questionários semiestruturados e análise de documentos da instituição. Resultados: o grau de implantação da intervenção foi de 80,74%, mostrando-se satisfatório, com destaque para a subdimensão qualidade técnico-científica. Conclusões: o sucesso no fornecimento de leite humano está atrelado às políticas públicas, ao apoio e orientações oferecidos às mães na unidade hospitalar, disponibilidade de rede de apoio, conhecimento das mães acerca dos benefícios do aleitamento materno, infraestrutura adequada e disponibilidade de insumos. Os prematuros estarem internados em hospital amigo da criança contribuiu para a implantação da intervenção.

Oropharyngeal colostrum administration in neonates with gastroschisis: a randomized clinical trial / Administração orofaríngea de colostro em recém-nascidos com gastrosquise: ensaio clínico randomizado

ABSTRACT Objective: To evaluate the effect of colostrum therapy on days to start a suckling diet in newborns diagnosed with simple gastroschisis. Methods: Randomized clinical trial with newborns diagnosed with simple gastroschisis at a federal hospital in Rio de Janeiro who were randomized to receive oropharyngeal administration of 0.2mL of colostrum or a "sham procedure" during the first 3 days of life. The analysis included clinical outcomes such as days without food, days with parenteral feeding, days until the start of enteral feeding, days to reach complete enteral feeding, sepsis and length of hospital stay. Results: The onset of oral feeding (suction) in patients with simple gastroschisis in both groups occurred at a median of 15 days. Conclusion: The present study showed that there were no significant differences in the use of colostrum therapy and the number of days to the start of enteral feeding and suction diet between groups of newborns with simple gastroschisis.

RESUMO Objetivo: Avaliar o efeito da colostroterapia em dias para iniciar a dieta por sucção em recém-nascidos com diagnóstico de gastrosquise simples. Métodos: Ensaio clínico randomizado com recém-nascidos diagnosticados com gastrosquise simples em um hospital federal no Rio de Janeiro que foram randomizados para receber administração orofaríngea de 0,2mL de colostro ou "procedimento simulado", nos primeiros 3 dias de vida. A análise incluiu desfechos clínicos, como dias sem alimentação, dias com alimentação parenteral, dias para iniciar a alimentação enteral, dias para atingir a alimentação completa, sepse e tempo de internação. Resultados: O início da alimentação por via oral (sucção) na gastrosquise simples, em ambos os grupos, ocorreu com mediana de 15 dias. Conclusão: O presente estudo mostrou que não há diferenças significativas no uso de colostroterapia em dias para início de alimentação enteral e dieta por sucção entre grupos de recém-nascidos com gastrosquise simples.

The trend of services provided by human milk banks between 2010 and 2019 in Brazil

Abstract Objective: To describe the trend of participation in group and individual support by human milk banks (HMBs) provided between 2010 and 2019 in Brazil. Methods: Ecological study with data from participation in group and individual support provided by the HMBs between 2010 and 2019, available in the production report of the Brazilian Network of Human Milk Banks. The number of participation in group and individual support was expressed for Brazil and for Brazilian macroregions in absolute numbers. Trend analysis was performed from the analysis of index numbers, considering the year 2010 as a reference. It was calculated the ratio of the number of participation in group and individual support by HMBs for each macroregion and year. Results: There was an increase of 42% in participation in group support (300,595 in 2010 vs 425,570 in 2019) and an increase of 69% in individual support (1,157,038 in 2010 vs 1,962,162 in 2019). The North and Northeast macroregions had the highest growth rates in the provision of these services (122 and 131%, respectively), above the national growth rate in the study period. In contrast, the Midwest region showed a downward trend throughout this period, for both types of support. However, in the Midwest, there was a higher ratio of participation in groups by HMBs between 2010 and 2016 and for individual support by HMBs between 2010 and 2012. Conclusion: Individual and group support provided by the HMB as a strategy to support breastfeeding increased considerably in Brazil during the study period, especially in the North and Northeast regions.

Infección tardía por Streptococcus agalactiae asociada a la leche humana: reporte de 3 casos clínicos / Streptococcus agalactiae late onset infection associated with human milk: three cases report

La infección por estreptococo ß-hemolítico del grupo B o Streptococcus agalactiae puede causar morbilidad grave y mortalidad en los recién nacidos, especialmente en prematuros. Las estrategias de prevención actuales han sido eficaces en reducir la frecuencia de sepsis neonatal temprana ocasionada por transmisión vertical. La incidencia de sepsis tardía por dicho microrganismo no se ha modificado y la vía de infección es menos clara. En niños amamantados, la transmisión a través de la leche materna es posible. Se presentan tres casos de infección tardía por estreptococo ß-hemolítico del grupo B en recién nacidos prematuros alimentados con leche materna cuyas madres tenían mastitis. En todos los casos, tanto en el cultivo de la leche materna como en los hemocultivos de los neonatos se desarrolló el mismo microrganismo.

Group B ß-hemolytic Streptococcus or Streptococcus agalactiae is a major cause of morbidity and mortality in neonates, especially in premature infants. Current prevention strategies have been effective in reducing the frequency of early onset neonatal sepsis caused by vertical transmission. The incidence of late onset sepsis due to this microorganism has not changed and the route of infection is less clear. In breastfed infants, transmission through breast milk is possible. We report three cases of late group B ß-hemolytic streptococcal infection in breastfed preterm infants whose mothers had mastitis. In all cases, both the breast milk culture and the blood cultures of the neonates developed the same microorganism.