A Pilot Study of Gene Expression Modulation from Antioxidant System of Killifish Austrolebias charrua After Exposure to Roundup Transorb®.

Roundup Transorb® (RDT) is the most popular glyphosate-based herbicide (GHB) used in agriculture, and its impact extends to non-target organisms. The annual killifish Austrolebias charrua is an endangered species endemic to southern South America and inhabits temporary ponds. This study evaluates the effects of RDT concentrations (0.065 and 5 mg/L GAE) on A. charrua exposed for 96 h. Gene expression of cat, sod2, gstα, gclc, and ucp1 was evaluated on the liver and gills. Highlighting that even at low concentrations permitted by Brazilian legislation, the RDT can have adverse effects on A. charrua.

Estimated energy and nutrient intake in complementary feeding methods in Brazilian infants: randomized clinical trial.

Inadequate nutrient intake during complementary feeding (CF) can affect healthy infant growth and development. A randomized clinical trial was conducted to examine the energy and nutrient intake in Brazilian children randomly assigned to three distinct CF methods. Mother-infant pairs participated in the study, with mothers receiving interventions in one of three CF approaches: (A) strict Parent-Led Weaning (PLW); (B) strict Baby-Led Introduction to Solids (BLISS); and (C) a mixed method. Assessments were made at 5.5 months, nine months, and 12 months of the child's age. Food consumption was measured through 24-h dietary recalls at nine and 12 months, with intake estimates calculated using the Brazilian Food Composition Table. Means or medians of energy and nutrients were compared between groups using ANOVA with Tukey's post hoc test or the Kruskal-Wallis test. A total of 115 infants were evaluated at nine months, and 102 at 12 months. Children in the PLW, BLISS, and mixed method groups exhibited comparable dietary intakes of energy, macronutrients, and micronutrients at both nine and 12 months. Infants following PLW, BLISS, and mixed methods demonstrated similar levels of energy and nutrient intake, underscoring the effectiveness of these strategies in ensuring comparable nutrient intake during the critical phase of CF.Trial registration The trial was registered in the Brazilian Registry of Clinical Trials (ReBEC) with identifier [RBR-229scm U1111-1226-9516], [ https://ensaiosclinicos.gov.br/rg/RBR-229scm ]. The full data of the first registration was on 24/09/2019.

Expression of sperm microRNAs related to bull fertility: A systematic review.

In this study we proposed to address the following question: "Are there differentially expressed sperm microRNAs related to fertility in bulls?". A systematic review of scientific literature until November 2022 was performed, in accordance with PRISMA guidelines. The main outcome was differentially expressed sperm microRNA from bulls with low versus high fertility profiles identified by using different methods such as field fertility evaluation and sperm laboratory analysis. Were identified 786 documents, of which 13 were selected for qualitative analysis. A total of 182 unique differentially expressed miRNAs were identified, among these, 49 miRNAs were found in common between at least two studies. It is believed that from these 49 miRNAs, it is possible that miRNAs such as miR-10a, -10b, -103, -15b, -122, -125b, -126-5p, -151-5p, -193a-5p, -196a, -27a-5p and -99b could be potential universal biomarkers to assess the reproductive potential of males.

Adherence to different complementary feeding methods in the first year of life: A randomized clinical trial.

BACKGROUND: Infant-guided methods, such as Baby-Led Introduction to SolidS (BLISS), encourage children to feed themselves from the same food consumed by their family since the beginning of the introduction of complementary foods, in opposition to the Parent-Led Weaning (PLW) method, which proposes foods mashed with a fork and given by parents. Adherence to child-guided methods is low due to a lack of confidence in the children's ability to feed themselves. This study aimed to assess adherence to three methods of food introduction: PLW, BLISS, or mixed (PLW and BLISS) at seven, nine, and 12 months of age. METHODS: A randomized clinical trial was conducted with mother-infant pairs undergoing intervention at 5.5 months of age. Data were presented in absolute numbers and percentages and analyzed using the Chi-Square test. RESULTS: The sample was constituted of 139 mother-infant pairs: 45 (32%) used PLW, 48 (35%) used BLISS, and 46 (33%) used the mixed method. Adherence to the method at seven, nine, and 12 months of age children was 34.1% (n = 45), 28.5% (n = 37), and 34.1% (n = 46), respectively. The mixed method presented significantly higher adherence results: 69.0% (n = 29) at seven months, 55.8% (n = 24) at nine months, and 78.6% (n = 33) at 12 months (p<0.001). Among the sample that unfollowed the proposed method, those who used PLW and BLISS migrated mostly to the mixed method at 12 months, 60.0% (n = 27) and 72.9% (n = 35) of them, respectively, because of the feeding mode and 97.8% (n = 44) and 100.0% (n = 48) because of food consistency. CONCLUSION: Complementary feeding in a mixed method presented higher adherence at seven, nine, and 12 months of age of children, which shows the feasibility of this approach to guide families in the introduction of complementary feeding.

Choking, gagging and complementary feeding methods in the first year of life: a randomized clinical trial.

OBJECTIVE: Compare the occurrence of choking and gagging in infants subjected to three complementary feeding (CF) methods. METHODS: Randomized clinical trial with mother-infant pairs, allocated according to the following methods of CF: a) Parent-Led Weaning (PLW) - group control, b) Baby-Led Introduction to SolidS (BLISS), and c) mixed (initially BLISS and if the infant presents a lack of interest or dissatisfaction, PLW), with the last two methods guided by the infant. Mothers received nutritional intervention on CF and prevention of choking and gagging according to the method at 5.5 months of age and remained in follow-up until 12 months. Frequencies of choking and gagging were collected by questionnaire at nine and 12 months. The comparison between groups was performed using the analysis of variance test (p < 0.05). RESULTS: 130 infants were followed, and 34 (26.2%) children presented choking between six and 12 months of age, 13 (30.2%) in PLW, 10 (22.2%) BLISS, and 11 (26.2%) mixed method, no significative difference between methods (p > 0.05). The choking was caused mainly by the semi-solid/solid consistency. Moreover, 100 (80%) infants aged from six to 12 months presented gagging and their characteristics were not statistically different among groups (p > 0.05). CONCLUSION: Infants following a baby-led feeding method that includes advice on minimizing choking risk do not seem more likely to choke than infants following traditional feeding practice that includes advice on minimizing choking risk.

Síntomas de estreñimiento funcional y métodos de alimentación complementaria: ensayo clínico aleatorizado / Functional constipation symptoms and complementary feeding methods: A randomized clinical trial

Introducción: El objetivo del estudio fue investigar el impacto de diferentes métodos de alimentación complementaria en la prevalencia de síntomas de estreñimiento funcional en lactantes a los 12 meses de edad. Materiales y métodos: Ensayo clínico aleatorizado realizado en díadas madre-lactante sometidas a intervención a los 5,5 meses del nacimiento, con asignación aleatoria a uno de los tres métodos de introducción de sólidos: destete dirigido por la madre, o parent-led weaning (PLW), método Baby-Led Introduction to Solids (BLISS) dirigido por el lactante, y mixto. Los síntomas de estreñimiento se evaluaron a los 12 meses mediante un cuestionario en línea basado en los criterios diagnósticos de Roma IV y adaptado a la muestra. Los análisis se realizaron mediante la prueba χ2 y los datos se expresaron como frecuencias absolutas y porcentajes. El proyecto fue aprobado por el comité de ética del Hospital de Clínicas de Porto Alegre con el número 2019-0230. Resultados: Se analizaron los datos de 135 lactantes, 45 asignados al método PLW, 48 al BLISS y 42 al método mixto. La prevalencia de síntomas de estreñimiento fue del 49,6% en la muestra global (n=67), siendo del 60% (n=27) en el método PLW, 47,9% (n=23) en el BLISS y 40,5% (n=17) en el mixto. No hubo asociación entre los síntomas de estreñimiento funcional y el método de introducción de la alimentación complementaria (p=0,183). Conclusiones: La prevalencia de estreñimiento y sus síntomas fue alta en la población estudiada. La prevalencia de los síntomas de estreñimiento funcional no se asoció con el método de alimentación complementaria. (AU)

Introduction: The aim of the study was to investigate the impact of different complementary feeding methods on the prevalence of functional constipation symptoms in infants at 12 months of age. Material and methods: Randomized clinical trial in mother–infant dyads that underwent the intervention at 5.5 months post birth, randomly allocated to one of three complementary food introduction methods: PLW (parent-led weaning), baby-led introduction to solids (BLISS) and a mixed approach. The symptoms of constipation were assessed at 12 months with an online questionnaire based on the Rome IV diagnostic criteria and adapted to our sample. The data were summarised as absolute frequencies and percentages and compared by means of the χ2 test. The project was approved by the ethics committee of the Hospital de Clínicas de Porto Alegre under number 2019-0230. Results: We analysed data corresponding to 135 infants, 45 allocated to PLW, 48 to BLISS and 42 to the mixed approach. The prevalence of constipation symptoms was 49.6% in the overall sample (n=67), 60% (n=27) in the PLW group, 47.9% (n=23) in the BLISS group and 40.5% (n=17) in the mixed approach group. We found no association between functional constipation symptoms and the method used to introduce complementary foods (P=.183). Conclusions: The prevalence of functional constipation symptoms was high in the study population. The presence of constipation symptoms was not associated with the complementary feeding approach. (AU)

Can the complementary feeding method be a strategy to reduce the offer of ultra-processed foods?

OBJECTIVE: To verify the prevalence of the offer of ultra-processed foods (UPFs), and to analyze their associated factors in the child's first year of life. METHODS: Cross-sectional study with 119 mother-infant pairs. At 5.5 months of the child, the mothers received guidance on complementary feeding (CF) according to three methods: Parent-Led Weaning (PLW), Baby-Led Introduction to SolidS (BLISS), or mixed (a combination of PLW and BLISS). At nine and 12 months, the mothers answered a questionnaire about the offer of UPFs. The NOVA classification, which classifies foods according to the nature, extent, and purposes of the industrial processes to which they are subjected, was used to list the UPFs. Descriptive statistics and multivariate Poisson regression, following a multilevel hierarchical model according to the proximity to the outcome, were used to estimate the association between dependent and independent variables. RESULTS: The prevalence of UPF consumption was 63% (n = 75) in the first year of life. Receiving guidance on healthy CF in the BLISS method showed to be a protective factor for offering UPFs (RR 0.72; CI95 0.52-0.99). Attending less than six prenatal consultations was a risk factor for the UPFs provision (RR 1.39; CI95 1.07-1.80). CONCLUSION: The prevalence of UPFs offered in the first year of life in this study can be considered high, and future interventions aimed at avoiding UPFs offered in this population should consider the CF method.

Functional constipation symptoms and complementary feeding methods: A randomized clinical trial.

INTRODUCTION: The aim of the study was to investigate the impact of different complementary feeding methods on the prevalence of functional constipation symptoms in infants at 12 months of age. MATERIAL AND METHODS: Randomized clinical trial in mother-infant dyads that underwent the intervention at 5.5 months post birth, randomly allocated to one of three complementary food introduction methods: PLW (parent-led weaning), Baby-led Introduction to SolidS (BLISS) and a mixed approach. The symptoms of constipation were assessed at 12 months with an online questionnaire based on the Rome IV diagnostic criteria and adapted to our sample. The data were summarised as absolute frequencies and percentages and compared by means of the χ2 test. The project was approved by the ethics committee of the Hospital de Clínicas de Porto Alegre under number 2019-0230. RESULTS: We analysed data corresponding to 135 infants, 45 allocated to PLW, 48 to BLISS and 42 to the mixed approach. The prevalence of constipation symptoms was 49.6% in the overall sample (n = 67), 60% (n = 27) in the PLW group, 47.9% (n = 23) in the BLISS group and 40.5% (n = 17) in the mixed approach group. We found no association between functional constipation symptoms and the method used to introduce complementary foods (P = .183). CONCLUSIONS: The prevalence of functional constipation symptoms was high in the study population. The presence of constipation symptoms was not associated with the complementary feeding approach.

Adherence to different methods for introducing complementary food to 7-month-old babies: a randomized clinical trial / Adesão a diferentes métodos de introdução da alimentação complementar aos 7 meses de vida: um ensaio clínico randomizado

Abstract Objective: To assess the adherence to three methods of food introduction for 7-month-old babies. Methods: This is a randomized clinical trial conducted with mother-infant pairs, submitted to the intervention with five and a half months of age and three different methods for food introduction according to randomization: Parent-Led Weaning (PLW), Baby-Led Introduction to SolidS (BLISS), or mixed (specially developed for this study). Adherence to the method was assessed at the seventh month of age, via telephone call to the caregiver by a researcher blinded to the method. The analyses were performed using the Chi-Square test and data are presented in absolute numbers and percentages. Results: A total of 139 mother-infant pairs were evaluated; 46 of them were allocated to the PLW method; 47, to the BLISS; and 46, to the mixed. At seven months of age, 60 (43.2%) mothers reported that the infants were following the proposed feeding method. When analyzing each approach, the mixed method showed a higher likelihood of adherence (71.7%, n=33), followed by the PLW method (39.1%, n=18) and by the BLISS (19.2%, n=9) (p<0.001). Among the sample that did not follow the proposed method, those that had been randomized to the PLW and BLISS methods mostly migrated to the mixed method (92.9%; n=26 and 92.1%; n=35, respectively) (p<0.001). Conclusions: Complementary feeding in a mixed approach obtained greater adherence in 7-month-old babies.

RESUMO Objetivo: Avaliar a adesão a três métodos de introdução alimentar aos 7 meses de vida. Métodos: Ensaio clínico randomizado com pares mães-lactentes submetidos à intervenção aos 5 meses e meio de vida sobre três diferentes métodos de introdução alimentar, conforme randomização: tradicional, Baby-Led Introduction to SolidS (introdução de sólidos guiada pelo bebê, em português) ou misto (criado especialmente para este estudo). A adesão ao método foi avaliada aos 7 meses em ligação telefônica feita para o cuidador por pesquisador cego em relação ao método. As análises foram realizadas por teste do qui-quadrado e os dados apresentados em número absoluto e percentual. Resultados: Foram avaliados 139 pares mães-lactentes, 46 alocados no método tradicional, 47 no Baby-Led Introduction to SolidS e 46 no misto. Aos 7 meses, 60 (43,2%) mães relataram que seus lactentes seguiam o método alimentar proposto. Analisando-se cada abordagem, o método misto apresentou maior probabilidade de adesão (71,7%, n=33), seguido do tradicional (39,1%, n=18) e de introdução de sólidos guiada pelo bebê (19,2%, n=9) (p<0,001). Da amostra que não seguiu o método proposto, aqueles que haviam sido randomizados para os métodos tradicional e de introdução de sólidos guiada pelo bebê migraram majoritariamente para o misto (92,9%; n=26 e 92,1%; n=35, respectivamente) (p<0,001). Conclusões: A alimentação complementar em abordagem mista obteve maior adesão aos 7 meses de idade.

Choking, gagging and complementary feeding methods in the first year of life: a randomized clinical trial

Abstract Objective: Compare the occurrence of choking and gagging in infants subjected to three complementary feeding (CF) methods. Methods: Randomized clinical trial with mother-infant pairs, allocated according to the following methods of CF: a) Parent-Led Weaning (PLW) — group control, b) Baby-Led Introduction to SolidS (BLISS), and c) mixed (initially BLISS and if the infant presents a lack of interest or dissatisfaction, PLW), with the last two methods guided by the infant. Mothers received nutritional intervention on CF and prevention of choking and gagging according to the method at 5.5 months of age and remained in follow-up until 12 months. Frequencies of choking and gagging were collected by questionnaire at nine and 12 months. The comparison between groups was performed using the analysis of variance test (p < 0.05). Results: 130 infants were followed, and 34 (26.2%) children presented choking between six and 12 months of age, 13 (30.2%) in PLW, 10 (22.2%) BLISS, and 11 (26.2%) mixed method, no significative difference between methods (p > 0.05). The choking was caused mainly by the semi-solid/solid consistency. Moreover, 100 (80%) infants aged from six to 12 months presented gagging and their characteristics were not statistically different among groups (p > 0.05). Conclusion: Infants following a baby-led feeding method that includes advice on minimizing choking risk do not seem more likely to choke than infants following traditional feeding practice that includes advice on minimizing choking risk.

Marcadores de consumo alimentar e diversidade alimentar mínima em diferentes métodos de introdução alimentar: um ensaio clínico randomizado / Food consumption markers and minimum dietary diversity in different complementary feeding methods: a randomized clinical trial

Objetivo: Avaliar os marcadores de consumo alimentar e a diversidade alimentar mínima em lactentes de 12 meses de vida expostos a diferentes métodos de introdução alimentar. Métodos: Ensaio clínico randomizado com pares mãe-lactente submetidos à intervenção sobre introdução alimentar em três métodos: Método tradicional (MT), Baby-led Introduction to SolidS (BLISS) e misto (combinação das duas técnicas). Os marcadores de consumo alimentar foram avaliados por questionário online aos 12 meses com base nos alimentos consumidos no dia anterior, utilizando os marcadores de consumo alimentar para menores de 2 anos do Sistema de Vigilância Alimentar e Nutricional. O estudo foi aprovado no comitê de ética. Resultados: Aos 12 meses foram avaliadas 136 crianças: 45 alocadas no MT, 48 no BLISS e 43 no misto. Os alimentos com maior prevalência de consumo foram: leite materno103 (75,7%), frutas, legumes e verduras 122 (89,7%), carnes ou ovos 135 (99,3%), feijão 115 (84,6%), cereais ou tubérculos 135 (99,3%). Alimentos ultraprocessados que estiveram presentes na dieta dos lactentes foram hambúrguer ou salsichas 3 (2,2%), bebidas açucaradas 2 (1,5%), macarrão instantâneo 4 (2,9%) e biscoito recheado 2 (1,5%).Não foram encontradas diferenças entre os métodos de introdução da alimentação complementar. A diversidade alimentar mínima esteve presente na alimentação de 22 lactentes (16,2%), sendo: 6 (13,3%) no MT, 8 (16,7%) no BLISS e 8 (18,6%) no misto (p=0,793). Conclusão: Leite materno,frutas, legumes e verduras, carne, feijão e arroz estiveram presentes na alimentação da maioria dos lactentes; no entanto, a prevalência de diversidade alimentar mínima foi baixa.O consumo de alimentos ultraprocessados também esteve presente na alimentação dos lactentes. Registro Brasileiro de Ensaios Clínicos (ReBEC) identificação RBR-229scm.

Objective: To evaluate food consumption markers and minimum dietary diversity in 12-month-old infants exposed to different methods of food introduction. Methods: A randomized clinical trial with mother-infant pairs undergoing intervention on food introduction in three methods: Parent-Led Weaning (PLW), Baby-Led Introduction to SolidS (BLISS), and mixed (combination of the two techniques). Food consumption markers were evaluated by an online questionnaire at 12 months based on food consumed the previous day, using food consumption markers for children under 2 years of the Food and Nutrition Surveillance System. The study was approved by the ethics committee. Results: At 12 months, 136 children were evaluated: 45 allocated to PLW, 48 to BLISS, and 43 to mixed. The foods with the highest prevalence of consumption were breast milk 103 (75.7%), vegetables 122 (89.7%), meat 135 (99.3%), beans 115 (84.6%), rice, potatoes, or yam 135 (99.3%). Ultra-processed foods were present in the diet of infants, including hamburgers or sausages 3 (2.2%), sweetened beverages 2 (1.5%), instant noodles 4 (2.9%), and sandwich cookies 2 (1.5 %). No differences were found between the methods of introducing complementary feeding. The minimum dietary diversity was present in the diet of 22 infants (16.2%), being: 6 (13.3%) in the PLW, 8 (16.7%) in the BLISS, and 8 (18.6%) in the mixed (p=0.793). Conclusion: Breast milk, vegetables, meat, beans, and rice were present in the diet of most infants; however, the prevalence of minimal dietary diversity was low. The consumption of ultra-processed foods was also present in the diet of infants. Brazilian Registry of Clinical Trials (ReBEC) identification RBR-229scm.

Can the complementary feeding method be a strategy to reduce the offer of ultra-processed foods?

Abstract Objective To verify the prevalence of the offer of ultra-processed foods (UPFs), and to analyze their associated factors in the child's first year of life. Methods Cross-sectional study with 119 mother-infant pairs. At 5.5 months of the child, the mothers received guidance on complementary feeding (CF) according to three methods: Parent-Led Weaning (PLW), Baby-Led Introduction to SolidS (BLISS), or mixed (a combination of PLW and BLISS). At nine and 12 months, the mothers answered a questionnaire about the offer of UPFs. The NOVA classification, which classifies foods according to the nature, extent, and purposes of the industrial processes to which they are subjected, was used to list the UPFs. Descriptive statistics and multivariate Poisson regression, following a multilevel hierarchical model according to the proximity to the outcome, were used to estimate the association between dependent and independent variables. Results The prevalence of UPF consumption was 63% (n = 75) in the first year of life. Receiving guidance on healthy CF in the BLISS method showed to be a protective factor for offering UPFs (RR 0.72; CI95 0.52-0.99). Attending less than six prenatal consultations was a risk factor for the UPFs provision (RR 1.39; CI95 1.07-1.80). Conclusion The prevalence of UPFs offered in the first year of life in this study can be considered high, and future interventions aimed at avoiding UPFs offered in this population should consider the CF method.

Complementary feeding methods and introduction of ultra-processed foods: A randomized clinical trial.

Introduction: Complementary feeding (CF) is defined as a period when foods, other than milk, are introduced to the infant's diet. Unfortunately, frequent consumption of ultra-processed foods (UPF) has become highly prevalent early in an infant's life. The aim was to verify the association of CF methods with the introduction of UPF in early childhood. Methods: This randomized clinical trial involved pairs of mother-infants, allocated in groups receiving different CF interventions: strict Parent-Led Weaning (PLW); strict Baby-Led Introduction to SolidS (BLISS), or mixed-method. The intervention consisted of a counseling session on healthy eating at the child's 5.5 months of age. A structured questionnaire was created based on the NOVA classification for the definition of UPF and applied at 9 and 12 months. The effect of the CF method intervention was measured by a survival curve for UPF offered for the first time in early childhood between groups. Cox regression was used to estimate its magnitude. The primary analysis was done in three groups (PLW, BLISS, and Mixed) and the secondary analysis was done in two groups (PLW, and BLISS + Mixed). Results: A total of 139 mother-infant pairs were eligible and 129 followed the study. The prevalence of infants who were exposed to UPF in early childhood was 58.9% (n = 76), being 71.4% in the PLW group, 53.3% in the BLISS group, and 52.4% in the Mixed group, without differences between them (p = 0.133). The PLW group intervention had a greater chance of exposure to ice cream or popsicles (p = 0.032) and sweet crackers (p = 0.009), compared with the other two CF groups. The Cox regression did not find significant differences between the three groups. However, the regression with two groups estimated a 38% reduction in the offer of UPF in the BLISS + Mixed group intervention (p = 0.049). Discussion: The CF intervention promoting greater infant autonomy (BLISS and Mixed) was associated with a reduction in the offer of UPF in early childhood. This knowledge may contribute to supporting strategies aimed at reducing UPF consumption by the young infant. Brazilian registry of clinical trials ReBEC: [https://ensaiosclinicos.gov.br/rg/RBR-229scm], identifier [RBR-229scm U1111-1226-9516].

Molecular of Anaplasma marginale Theiler (Rickettsiales: Anaplasmataceae) in horseflies (Diptera: Tabanidae) in Uruguay.

Anaplasma marginale is transmitted biologically by infected ticks or mechanically by biting flies and contaminated fomites. In tick-free areas, such as southern Uruguay, horseflies could be the principal vectors of this pathogen for bovines, causing anaplasmosis. The objective of this work was to detect the presence of A. marginale by MSP-5 PCR and Sanger sequencing in the most prevalent species of horseflies obtained using different collection methods in Colonia, Tacuarembó and Paysandú, Uruguay. Eight horsefly species were tested (Dasybasis missionum, Poeciloderas lindneri, Tabanus campestris, T. claripennis, T. fuscofasciatus, T. platensis, T. tacuaremboensis and T. triangulum); four species were found to be positive for A. marginale, with D. missionum and P. lindneri having the most frequent infections, while only one individual each of T. fuscofasciatus and T. tacuaremboensis was positive. Both D. missionum and P. lindneri were positive for A. marginale in tick-free areas, and the implications are discussed in this report.

Protective measures feasibility for infants of low income SARS-CoV-2 positive breastfeeding mothers: a prospective multicenter cohort study.

AIM: The aim was to evaluate the feasibility of protective measures for infants of low-income SARS-CoV-2 positive breastfeeding mothers. BACKGROUND: Breastfeeding mothers with SARS-CoV-2 positive should avoid exposing the infant through protective measures (PM), but it could be challenging in a low-income population. METHODS: A prospective, multicenter study was conducted between July and October 2020 (BRACOVID). The participants were recruited at birth and interviewed through a structured questionnaire at seven and 14 days in the home environment. The feasibility of PM during breastfeeding at home was defined by guidelines recommendations (mask using, handwashing, and distancing from newborn when not breastfeeding). Three groups according to the feasibility of guidelines: complete guidelines feasibility (CG): all PM; partial guidelines feasibility (PG): at least one PM feasible; no guidelines (NG): infeasibility to all of PM. Flu-like neonatal symptoms, mothers' breastfeeding practices. We evaluated the association between PM feasibility and socioeconomic factors. RESULTS: 117 infected mothers from 17 Brazilian hospitals were enrolled. 47 (40%) mothers followed all recommendations, 14 (11.9%) could not practice at least one recommendation, and 50 (42.7%) did not execute any of them. The breastfeeding rate was 98%. Factors associated with infeasibility were monthly family income < 92.7 dollars/person, high housing density (>1 inhabitant/room), teenage mothers, responsive feeding, and poor schooling. Regarding infants' flu-like symptoms, 5% presented symptoms at fourteen days (NG group). CONCLUSION: The guidelines were not applied to infants of SARs-CoV-positive mothers in 54.6% of the dyads since the recommendations were unviable in their environments. During pandemics, we should look for feasible and effective guidelines to protect neonates from low-income populations. IMPLICATIONS FOR NURSING MANAGEMENT: Poor socioeconomic conditions lead to the unfeasibility of protective measures for infants of low-income SARS-CoV-2 positive breastfeeding mothers during the isolation period in the pandemics. The orientations and the support provided to dyad should consider the socioeconomic factors to guide feasible measures in the home environment and promote adequate protections; only an individual approach will allow a safe environment for low-income infants.

Adherence to different methods for introducing complementary food to 7-month-old babies: a randomized clinical trial.

OBJECTIVE: To assess the adherence to three methods of food introduction for 7-month-old babies. METHODS: This is a randomized clinical trial conducted with mother-infant pairs, submitted to the intervention with five and a half months of age and three different methods for food introduction according to randomization: Parent-Led Weaning (PLW), Baby-Led Introduction to SolidS (BLISS), or mixed (specially developed for this study). Adherence to the method was assessed at the seventh month of age, via telephone call to the caregiver by a researcher blinded to the method. The analyses were performed using the Chi-Square test and data are presented in absolute numbers and percentages. RESULTS: A total of 139 mother-infant pairs were evaluated; 46 of them were allocated to the PLW method; 47, to the BLISS; and 46, to the mixed. At seven months of age, 60 (43.2%) mothers reported that the infants were following the proposed feeding method. When analyzing each approach, the mixed method showed a higher likelihood of adherence (71.7%, n=33), followed by the PLW method (39.1%, n=18) and by the BLISS (19.2%, n=9) (p<0.001). Among the sample that did not follow the proposed method, those that had been randomized to the PLW and BLISS methods mostly migrated to the mixed method (92.9%; n=26 and 92.1%; n=35, respectively) (p<0.001). CONCLUSIONS: Complementary feeding in a mixed approach obtained greater adherence in 7-month-old babies.

Modulation of miR-429 during osmotic stress in the silverside Odontesthes humensis.

Silverside fish inhabit marine coastal waters, coastal lagoons, and estuarine regions in southern South America. Although silversides are not fully adapted to freshwater, they can tolerate a wide range of salinity variations. MicroRNAs (miRNAs) are a class of ∼22 nucleotide noncoding RNAs, which are crucial regulators of gene expression at post-transcriptional level. Current data indicate that miRNAs biogenesis is altered by situations of environmental stress, thereby altering the expression of target mRNAs. Foremost, the silversides were acutely exposed to 30 g.L-1 of salt to reveal in which tissue miR-429 could be differentially expressed. Thus, fish were acclimated to freshwater (0 g.L-1) and to brackish water (10 g.L-1), and then exposed to opposite salinity treatment. Here, we reveal that miR-429, a gill-enriched miRNA, emerges as a prime osmoregulator in silversides. Taken together, our findings suggest that miR-429 is an endogenous regulator of osmotic stress, which may be developed as a biomarker to assist silverside aquaculture.

Exposure to salinity induces oxidative damage and changes in the expression of genes related to appetite regulation in Nile tilapia (Oreochromis niloticus).

Variations in water salinity and other extrinsic factors have been shown to induce changes in feeding rhythms and growth in fish. However, it is unknown whether appetite-related hormones mediate these changes in Nile tilapia (Oreochromis niloticus), an important species for aquaculture in several countries. This study aimed to evaluate the expression of genes responsible for appetite regulation and genes related to metabolic and physiological changes in tilapia exposed to different salinities. Moreover, the study proposed to sequence and to characterize the cart, cck, and pyy genes, and to quantify their expression in the brain and intestine of the fish by quantitative polymerase chain reaction (qPCR). The animals were exposed to three salinities: 0, 6, and 12 parts per thousand (ppt) of salt for 21 days. Furthermore, lipid peroxidation, reactive oxygen species, DNA damage, and membrane fluidity in blood cells were quantified by flow cytometry. The results indicated an increased expression of cart, pyy, and cck and a decreased expression of npy in the brain, and the same with cck and npy in the intestine of fish treated with 12 ppt. This modulation and other adaptive responses may have contributed to the decrease in weight gain, specific growth rate, and final weight. In addition, we showed oxidative damage in blood cells resulting from increasing salinity. These results provide essential data on O. niloticus when exposed to high salinities that have never been described before and generate knowledge necessary for developing biotechnologies that may help improve the production of economically important farmed fish.