Contamination of equipment and surfaces in the operating room anesthesia workspace: a cross-sectional study

ABSTRACT BACKGROUND: Contamination of the breathing circuit and medication preparation surface of an anesthesia machine can increase the risk of cross-infection. OBJECTIVE: To evaluate the contamination of the anesthetic medication preparation surface, respiratory circuits, and devices used in general anesthesia with assisted mechanical ventilation. DESIGN AND SETTING: Cross-sectional, quantitative study conducted at the surgical center of a philanthropic hospital, of medium complexity located in the municipality of Três Lagoas, in the eastern region of the State of Mato Grosso do Sul. METHODS: Eighty-two microbiological samples were collected from the breathing circuits. After repeating the samples in different culture media, 328 analyses were performed. RESULTS: A higher occurrence of E. coli, Enterobacter spp., Pseudomonas spp., Staphylococcus aureus, and Streptococcus pneumoniae (P < 0.001) were observed. Variations were observed depending on the culture medium and sample collection site. CONCLUSION: The study findings underscore the inadequate disinfection of the inspiratory and expiratory branches, highlighting the importance of stringent cleaning and disinfection of high-touch surfaces.

Racismo e Sexismo: Estruturas de Transmissão, Incidências da História e Insistências do Real / Racism and Sexism: Transmission Structures, History Incidences and Insistences of the Real / Racismo y Sexismo: Estructuras de Transmisión, Incidencias de la Historia e Insistencias de lo Real

Este artigo propõe articulações entre as estruturas coloniais de incidência do racismo e do sexismo no laço social e suas vias de inscrição no inconsciente e no corpo. Partimos de um debate sobre o enquadre colonial da subjetividade e de questões levantadas por Frantz Fanon acerca do modo como o racismo se conecta com a lógica fálica do complexo de Édipo para avaliar sua validade em relação à realidade de povos colonizados. Retomamos formulações freudianas e lacanianas úteis para abordar essa encruzilhada, a partir dos caminhos apontados por Lélia Gonzalez ao discutir as subversões operadas pela mulher negra diante do racismo e do sexismo no contexto brasileiro. Com base em alguns fragmentos clínicos, sustentamos que uma abordagem clínica da perspectiva interseccional antecipada por Lélia Gonzalez demanda uma tomada dialética das relações entre estrutura e história, entre o coletivo e o singular e entre o inconsciente colonizado e o resto que escapa e subverte as relações de dominação.

This article proposes articulations between the colonial structures of incidence of the racism and sexism in the social bond and their ways of inscription in the unconscious and in the body. Starting from a debate about the colonial framework of subjectivity and from questions raised by Frantz Fanon about how the racism connects with the phallic logic of the Oedipus complex to assess its validity in relation to the reality of colonized peoples. We return to useful Freudian and Lacanian formulations to address this crossroads, based on the paths pointed out by Lélia Gonzalez when discussing the subversions operated by black women in the face of racism and sexism in the Brazilian context. Based on some clinical fragments, we argue that a clinical approach to the intersectional perspective anticipated by Lélia Gonzalez demands a dialectical approach to the relations between structure and history, between the collective and the singular, and between the colonized unconscious and the rest that escapes and subverts the relations of domination.

Este artículo propone articulaciones entre las estructuras coloniales de incidencia del racismo y del sexismo en el lazo social y sus formas de inscripción en el inconsciente y en el cuerpo. Partimos de un debate sobre el marco colonial de la subjetividad y de las preguntas planteadas por Frantz Fanon sobre la forma en que el racismo se relaciona con la lógica fálica del complejo de Edipo para evaluar su validez con relación a la realidad de los pueblos colonizados. Retomamos formulaciones freudianas y lacanianas útiles para abordar esta encrucijada, a partir de los caminos señalados por Lélia González al discutir las subversiones operadas por las mujeres negras frente al racismo y al sexismo en el contexto brasileño. En función de algunos fragmentos clínicos, sostenemos que una aproximación clínica de la perspectiva interseccional, anticipada por Lélia González, exige un abordaje dialéctico de las relaciones entre estructura e historia, entre lo colectivo y lo singular y entre el inconsciente colonizado y el resto que escapa y subvierte las relaciones de dominación.

Mobile phones of anesthesiologists as reservoirs of nosocomial bacteria in a quaternary teaching hospital: an observational study

Abstract Background: Mobile phones in hospital settings have been identified as an important source of cross-contamination because of the low frequency with which mobile phones are cleaned by health workers and cyclical contamination of the hands and face. The aim of this study was to investigate whether the mobile phones of the anesthesia team at a teaching hospital are potential reservoirs of nosocomial bacteria. In addition, differences in device sanitization and hand hygiene habits between attending and resident anesthesiologists were correlated with mobile phone colonization. Methods: A prevalence study was conducted over a 6-month period from 2017 to 2018 that involved the collection of samples from the mobile phones of the anesthesiology team and culturing for surveillance. A questionnaire was administered to assess the mobile phone sanitization and hand washing routines of the anesthesia team in specific situations. Results: Bacterial contamination was detected for 86 of the 128 mobile phones examined (67.2%). A greater presence of Micrococcus spp. on devices was correlated with a higher frequency of mobile phone use (p = 0.003) and a lower frequency of sanitization (p = 0.003). The presence of bacteria was increased on the mobile phones of professionals who did not perform handwashing after tracheal intubation (p = 0.003). Conclusion: Hand hygiene and device sanitization habits were more important than the use behavior, as a higher presence of bacteria correlated with poorer hygiene habits. Furthermore, handwashing is the best approach to prevent serious colonization of mobile devices and the possible transmission of pathogens to patients under the care of anesthesiologists.

Seasonal Variation of Mycorrhizal Association (Root Colonization and Spore Density) in Selected Industrial Sites in Kota District of Rajasthan, India

This paper aims to assess the impact of seasonal variation on mycorrhizal association in selected industrial wastelands in the Kota district of Rajasthan. In the study mycorrhizal association was quantified in terms of percentage root colonization and spore density in three different seasons. The study was conducted during 2019-2021 and the data was collected for 3 seasons; summer (March-June), Rainy (July–October), and winter (November-February) to study the response to variable climatic factors to the root colonization and spore density of mycorrhiza. To determine the significance of variations in AMF spore density and percentage root colonization during different seasons, one-way ANOVA was performed. Results showed that in all the sites maximum mean spore density was observed in the summer (March-June) season but in the case of percentage root colonization, the value was found maximum in the humid season (July-October) in the control site whereas, in the three experimental sites, the maximum root colonization was observed in summer season (march-June). Hence, it may be concluded that hot climatic condition is favourable for mycorrhizal spore formation and root colonization was also favoured by hot climate.

Research progress of intestinal microecological disorders caused by antibiotics and the treatment / 药学学报

There is a variety of gut microbiota in human body, which is closely associated with the health and disease. Normal gut microbiota can produce colonization resistance to pathogens. Antibiotics can affect the composition of gut microbiota and change the intestinal microenvironment, resulting in intestinal microecological disorders, which in turn cause intestinal pathogenic infections and other diseases. In this paper, the concept of intestinal microecology, the mechanism of intestinal colonization resistance, the effect of antibiotics on intestinal microecology, and the treatment methods were reviewed, aiming to provide the information for the rational use of antibiotics and the development of more effective treatment methods to maintain the stability of intestinal microecology.

Study on the nasal colonization of Staphylococcus aureus among healthcare workers in a hospital in Shaanxi Province / 中国热带医学

@#Abstract: Objective　To determine the rate of nasal carriage Staphylococcus aureus among healthcare workers in Department of Infectious Diseases department of the First Affiliated Hospital of Xi'an Jiaotong University Hospital, and to perform characterization on isolated strains. Methods　A cross-sectional study was performed on 86 healthcare workers from February 2022 to June. Nasal swabs were collected from the healthcare workers, and S. aureus were identified after incubation. Antibiotic susceptibility, including chlorhexidine and mupirocin, was assessed by disk diffusion and minimal inhibitory concentration method. The PCR technique was used to detect the biocide resistance genes (qacAB, smr, lmrS mepA, and sepA), virulence genes (pvl, fnbA/fnbB, sea, seb, sec, sed, tst, eta, etb) and mecA gene. SCCmec typing and multilocus sequence typing was performed. For mupirocin-resistant strains, PCR amplification and sequencing were used to identify whether the strains had ileS gene mutations or carried resistant genes (mupA and mupB). Results　S. aureus was isolated from 37 of the 86 healthcare workers (43.02%) , including 13 methicillin-resistant Staphylococcus aureus (MRSA) strains. The strains showed low resistance rates to levofloxacin (2.70%, 1/37), chloramphenicol (8.11%, 3/37), tetracycline (8.11%, 3/37), gentamicin (10.81%, 4/37), and ciprofloxacin (10.81%, 4/37). A total of 17 strains were identified as multidrug-resistant strains. Four SCCmec types were identified in MRSA strains, with the type II being the most frequent (53.85%, 7/13), followed by type IV (30.77%, 4/13). ST59 (46.15%, 6/13) was the most frequent among MRSA strains, while ST5 (41.67%, 10/24) was the most frequent among methicillin-susceptible S. aureus (MSSA) strains. sea was the most frequent virulence gene (56.76%, 21/37). sepA and mepA were detected in all 37 isolates. One Staphylococcus aureus strain was not sensitive to chlorhexidine, two strains had the missense mutation V588F (G1762T) and showed low level resistance to mupirocin, and one strain carrying mupA gene was highly resistant to mupirocin. Conclusion　The nasal colonization rate of Staphylococcus aureus among healthcare worker in the investigated hospital was high, indicating a risk for nosocomial infections. Strengthened monitoring and decolonization treatment should be carried out to reduce these risks.

Systemic infection caused by the methicillin-resistant Staphylococcus aureus USA300-LV lineage in a Brazilian child previously colonized

ABSTRACT The methicillin-resistant Staphylococcus aureus (MRSA) USA300-Latin American variant (USA300-LV) lineage is well documented in northern Latin American countries. It has replaced established clones in hospital environments. We herein report a systemic infection caused by a USA300-LV isolate in a 15-year-old boy, from a low-income area of Rio de Janeiro, previously colonized by the same strain. During hospital stay, seven pvl-positive MRSA USA300-LV isolates were recovered by nasal swab, blood and abscess secretion. The patient underwent intravenous vancomycin, daptomycin, and oral sulfamethoxazole/trimethoprim, and was discharged after 45 days after full recovery. This is the first documented case of a community-acquired MRSA infection caused by the USA300-LV variant in Brazil in a previously colonized adolescent with no history of recent travel outside of Rio de Janeiro. The need for improved surveillance programs to detect MRSA colonization in order to control the spread of hypervirulent lineages among community and hospital settings is highlighted.

Group B Streptococcal Colonization among Pregnant Women and Neonates in a Tertiary Care Hospital in South India

Objectives To assess the prevalence of maternal and neonatal group B Streptococcal colonization, incidence of neonatal systemic illness, and antibiotic sensitivity of isolates. Methods This prospective cohort study was conducted in a South Indian tertiary care hospital. Rectovaginal swabs from pregnant mothers at 360/7–376/7 wk gestation and throat and rectal swabs from their neonates at 48 h of age were collected. Presence of group B Streptococcus (GBS) was identifed by broth enrichment step, and traditional microbiologic methods and antibiotic sensitivity of isolates was noted. All mothers received intrapartum antibiotic prophylaxis (IAP). Culture-positive sepsis, clinical sepsis, pneumonia, meningitis, and urinary tract infection were defned as neonatal systemic illness. Neonates of colonized mothers were followed at 3 mo for late-onset sepsis. Results Of the 310 mothers, 40 were GBS colonized (prevalence: 12.9%; 95% CI 9.2%, 17.6%). None of the neonates were colonized. Maternal GBS colonization was signifcantly associated with premature rupture of membrane (RR - 2.93, 95% CI - 1.66–5.16) and neonatal systemic illness (RR - 2.78, 95% CI - 1.39–5.54). Positive correlation was noted between duration of IAP?4 h and neonatal illness and between maternal GBS colonization and Apgar at 1 min?4. Clindamycin resistance was noted in 20%. All neonates remained well at 3 mo follow-up. Conclusion High maternal colonization alerts the need for GBS screening in India. Clindamycin resistance among GBS isolates questions its efectiveness as alternative therapy in penicillin allergy.

Caesarian Vs Vaginal Delivery: From A Human Microbiota Perspective

The route of the birth delivery influences new born's health. Children born via Cesarean section are at increased risk of developing asthma, systemic connective tissue disorders, juvenile arthritis, inflammatory bowel disease, immune deficiencies and leukemia. Part of these diseases is believed to be related to maturation of neonatal immune system. During vaginal delivery, the contact with the maternal vaginal and intestinal flora is an important source for the start of the infant's colonisation. During Caesarean delivery, this direct contact is absent, and non-maternally derived environmental bacteria plays an important role for infant's gastro-intestinal colonisation. The primary function of microbial colonisation during the foetal period, intrapartum and after the birth is crucial in maturation and development of new-bornimmune system. This review supports the choice of the route of birth delivery and consequently favours a decrease in unnecessary Cesarean sections. It is crucial to provide this information to pregnant women and/or couples and health workers to make informed and educated decisions

A Colonização dos Corpos e dos Afetos pelo Capitalismo: Um Debate Necessário / The Colonization of Bodies and Affections for Capitalism: A Necessary Debate / La Colonización de los Cuerpos y el Afecto por el Capitalismo: Un Debate Necesario

O presente estudo teórico tem por objetivo problematizar uma prática consolidada no contemporâneo: o consumo. Longe de responder à satisfação de necessidades básicas, as práticas de consumo são engendradas por uma série de enquetes realizadas por áreas como o marketing, a publicidade e o design. Elas visam não apenas conhecer as expectativas dos consumidores, mas também incutir neles o prazer de consumir, valendo-se de elementos simbólicos, afetivos e subjetivos. A argumentação teórica deste estudo, pautada na Psicologia Social, percorre o seguinte trajeto: primeiro, busca-se compreender o processo de colonização pela via do consumo atentando para como elas incidem sobre os corpos e os afetos. Na sequência, é colocada em análise a complexa relação com o que chamamos de estrangeiro, que pode tomar contornos colonizadores, mas também engendrar outras sensibilidades e maneiras de se vincular ao mundo. Ao final do estudo constata-se o quanto o sujeito contemporâneo deixa-se colonizar pelas promessas midiáticas de felicidade, satisfação e prazer que são proclamadas de maneira idealizada nas campanhas publicitárias em favor do consumo. Isso coloca à Psicologia Social o desafio de dar visibilidade aos processos de colonização, analisando criticamente os efeitos estéticos, afetivos, econômicos e políticos gerados para a população e para o planeta.

The present theoretical study aims to analyze a consolidated practice in the contemporary: consumption. Far from responding to the satisfaction of basic needs, consumer practices are engendered through surveys conducted by areas such as marketing, advertising and design. They aim not only to know the expectations of consumers, but also to instill in them the pleasure of consuming, using symbolic, affective and subjective elements. The theoretical argumentation of this study, based on Social Psychology, follows the following path: first, we seek to understand the process of colonization through consumption by looking at how they affect bodies and affections. Next, the complex relationship with what we call the alien, which can take colonizing contours, but also engender other sensitivities and ways of linking to the world, is put into analysis. At the end of the study, it is verified how much the contemporary subject is colonized by the media promises of happiness, satisfaction and pleasure that are proclaimed in an idealized way in advertising campaigns in favor of consumption. This gives social psychology the challenge of giving visibility to colonization processes, critically analyzing the aesthetic, affective, economic and political effects generated for the population and for the planet.

El presente estudio teórico pretende problematizar una práctica consolidada en lo contemporáneo: el consumo. Lejos de responder a la satisfacción de las necesidades básicas, las prácticas de consumo se engendran a través de encuestas realizadas por áreas como el marketing, la publicidad y el diseño. Su objetivo no es solo conocer las expectativas de los consumidores, sino también inculcarles el placer de consumir, utilizando elementos simbólicos, afectivos y subjetivos. La argumentación teórica de este estudio, basada en la Psicología Social, sigue el siguiente camino: en primer lugar, busca comprender el proceso de colonización a través del consumo observando cómo afectan a los cuerpos y a las afecciones. A continuación, se analiza la compleja relación con lo que llamamos el extranjero, que puede tomar contornos colonizadores, pero también engendrar otras sensibilidades y formas de vincularse con el mundo. Al final del estudio, se verifica hasta qué punto el sujeto contemporáneo está colonizado por las promesas mediáticas de felicidad, satisfacción y placer que se proclaman de manera idealizada en las campañas publicitarias a favor del consumo. Esto pone a la Psicología Social el desafío de dar visibilidad a los procesos de colonización, analizando críticamente los efectos estéticos, afectivos, económicos y políticos generados para la población y para el planeta.

Descripción morfológica y caracterización molecular de los hongos asociados a la raíz de Masdevallia coccinea Linden ex Lindl / Morphological description and molecular characterization of fungi associated with the root of Masdevallia coccinea Linden ex Lindl

RESUMEN Masdevallia coccinea es una orquídea llamativa, endémica de Colombia, empleada en la generación de híbridos ornamentales con más de una década, clasificada como una especie en peligro de extinción. Entre las técnicas usadas para la propagación in vitro y ex situ de especies de la familia Orchidaceae, se estudia la simbiosis micorrízica, debido a que esta familia micoheterótrofa depende de una correlación con estos hongos para subsistir en las primeras etapas de desarrollo en estado silvestre. Con el objetivo de caracterizar e identificar los hongos asociados a las raíces de M. coccinea, se realizó un estudio histológico en raíces y, a partir de micropreparados, se caracterizó morfológicamente micro, macroscópica y molecularmente diez aislamientos. Se identificó a M. coccinea como una orquídea que presenta diferentes patrones de colonización micorrízicos y con posibles efectos endófitos de los géneros Aspergillus, Scopulariopsis, Trichoderma, Ilyonectria y del orden Xylariales en condiciones ex situ.

ABSTRACT Masdevallia coccinea is a striking orchid, endemic to Colombia, used in the generation of ornamental hybrids, with more than a decade classified as an endangered species. Among the techniques used for in vitro and ex situ propagation of species of the Orchidaceae family, mycorrhizal symbiosis is studied, because this mycoheterotrophic family depends on a correlation with these fungi to survive in the early stages of development in the wild. In order to characterize and identify the fungi associated with the roots of M. coccinea, a histological study was carried out on roots and 10 isolates were morphologically, macroscopically and molecularly characterized from micropreparations. M. coccinea is identified as an orchid with different mycorrhizal colonization patterns and with possible endophytic effects of the genera Aspergillus, Scopulariopsis, Trichoderma, Ilyonectria and the order Xylariales under ex situ conditions.

Health of the Newborn and Breastfeeding during the COVID-19 Pandemic: A Literature Review / Saúde do recém-nascido e amamentação durante a pandemia de COVID-19: Uma revisão da literatura

Abstract Objective The present article presents a literature review concerning the microbiota of breast milk and the influence of epigenetics in the susceptibility to COVID-19. Methods A literature review. Results Breastfeeding transfers microbiota, nutrients, diverse white blood cells, prebiotics, hormones, and antibodies to the baby, which provide short- and longterm immunological protection against several infectious, gastrointestinal, and respiratory illnesses. The little evidence available shows that breast milk very rarely carries the SARS-CoV-2 virus, and even in those cases, it has been discarded as the source of contagion. Conclusion The reviewed studies show evidence of a beneficial effect of breastfeeding and highlights its importance on the current pandemic due to the immune reinforcement that it provides. Breastfed individuals showed better clinical response due to the influence on the microbiota and to the nutritional and immune contribution provided by breast milk, compared with those who were not breastfed.

Resumo Objetivo O presente artigo apresenta uma revisão de literatura sobre amicrobiota do leite materno e a influência da epigenética na suscetibilidade à COVID-19. Métodos Revisão de literatura. Resultados A amamentação transfere microbiota, nutrientes, diversos glóbulos brancos, prebióticos, hormônios e anticorpos para o bebê, os quais proporcionam proteção imunológica de curto e longo prazo contra diversas doenças infecciosas, gastrointestinais e respiratórias. As poucas evidências disponíveis mostram que o leite materno transportamuito raramente o vírus SARS-CoV-2, emesmo nestes casos, ele foi descartado como fonte de contágio. Conclusão Os estudos revisados mostram evidências de um efeito benéfico da amamentação e destacam sua importância na atual pandemia devido ao reforço imunológico que ela proporciona. Os indivíduos amamentados mostraram melhor resposta clínica devido à influência sobre a microbiota, e à contribuição nutricional e imunológica proporcionada pelo leite materno, em comparação com aqueles que não o foram.

Distribuição de grupos folclóricos em Santa Catarina e sua relação com a colonização do Estado / Distribution of folkloric groups in Santa Catarina and its relation to the colonization of the State / Distribución de grupos folclóricos en Santa Catarina y su relación con la colonización del Estado

O objetivo foi verificar se o histórico de colonização das diferentes regiões de Santa Catarina se reflete na distribuição atual dos grupos folclóricos do estado. Os dados quantitativos foram retirados da listagem fornecida pela Fundação Catarinense de Cultura. Para as informações históricas, foi feita uma revisão bibliográfica. Estão registrados 182 grupos folclóricos distribuídos por 74 cidades. A etnia mais abundante foi a alemã, seguida pela luso-açoriana, e então italiana, gaúcha, de outros países europeus, grupos mistos, afrobrasileiros e outros. Os grupos luso-açorianos se concentram no litoral, o que concorda com o fato de terem sido responsáveis pela colonização mais antiga. Para os alemães e demais europeus, foram geograficamente observadas as duas principais ondas de imigração historicamente registradas: primeiro no nordeste e vale do Itajaí e posteriormente no oeste. Percebeu-se que a distribuição de grupos folclóricos de cada etnia tem relação com o processo de colonização das diferentes regiões.

The objective was to verify if the colonization history of different regions of Santa Catarina is reflected on the current distribution of the folkloric groups of the state. The quantitative data were taken from the list provided by the Fundação Catarinense de Cultura. For the historical information, a bibliographic review was done. There are 182 groups registered, distributed on 74 cities. The most abundant ethnicity was German, followed by Portuguese-Azorean, Italian, gaúcha, other European countries, mixed groups, African-brazilian and others. The Portuguese-Azorean groups concentrate on the coast, what agrees with the fact they were responsible for the oldest colonization. For the Germans and other Europeans, the two main colonization waves historically registered were geographically observed: first on the northeast and Itajaí's valley and after on the west. It was perceived that the distribution of the folkloric groups of each ethnicity is related to the colonization process of the different regions.

El objetivo fue verificar si la historia de colonización de las regiones de Santa Catarina se refleja en la distribución actual de los grupos folclóricos en el estado. Los datos cuantitativos fueron tomados de la lista proporcionada por la Fundação Catarinense de Cultura. Para información histórica, se realizó una revisión bibliográfica. Hay 182 grupos folclóricos distribuidos en 74 ciudades. La etnia más abundante fue la alemana, seguida por la portuguesa-azoriana, italiana, gaucha, otros países europeos, grupos mixtos, afrobrasileños y otros. Los grupos luso-azoreanos se concentran en la costa, lo que concuerda con el hecho de que fueron los responsables de la colonización más antigua. Para los alemanes y otros europeos, se observaron geográficamente las principales olas de inmigración registradas: en el noreste, el valle de Itajaí el oeste. Se notó que la distribución de los grupos folclóricos de cada etnia está relacionada con el proceso de colonización de las regiones.

Riesgo de infección en pacientes oncológicos colonizados por bacterias productoras de p-lactamasas de espectro extendido y enterobacterias productoras de carbapenemasas / Risk of infection in cancer patients colonized by extended expectrum p-lactamases and carbapenem producing Enterobacteriaceae

INTRODUCCIÓN: La prevalencia de microorganismos multirresistentes es un problema de salud pública que continúa creciendo a lo largo del mundo. Existe una población principalmente susceptible de ser colonizada y posteriormente infectarse, son los pacientes oncológicos. OBJETIVO: Identificar las características clínicas y patológicas de los pacientes oncológicos y su relación con la infección con microorganismos productores de BLEE y EPC. PACIENTES Y MÉTODOS: Se condujo un estudio retrospectivo y de carácter analítico entre el primero de enero de 2019 y el 30 de junio de 2020 en tres unidades hemato-oncológicas. RESULTADOS: Incluyó a 3.315 pacientes, de los cuales 217 (6,5%) se encontraban colonizados por microorganismos productores de BLEE y EPC; de éstos, 106/217 (48,8%) presentaron al menos un episodio de infección. El microorganismo más frecuentemente aislado fue Klebsiella pneumoniae, en 29/106 (27,4%). De los infectados, 18/106 (17%) presentaron infección por el mismo microorganismo colonizador. La mucositis (p = 0,002), edad mayor a 65 años (p = 0,041), hipoalbuminemia (p < 0,01), neutropenia (p < 0,01) y la presencia dispositivos invasivos (p < 0,01) demostraron una relación con el desarrollo de infección. CONCLUSIÓN: La presencia de hipoalbuminemia (OR 3,3, IC 1,5-7,1, p < 0,01), dispositivos invasivos (OR 5,8, IC 3.0-11,4, p < 0,01) y neutropenia (OR 4,1, IC 1,5-11,4, p < 0,01) predicen el desarrollo de infecciones.

BACKGROUND: The prevalence of multi-resistant microorganisms is a public health problem that continues to grow globally. There is a population that is mainly susceptible to being colonized and subsequently infected, and these are cancer patients. AIM: To identify the clinical and pathological characteristics of cancer patients and their relationship with infection with ESBL and CPE producing microorganisms. METHODS: A retrospective and analytical study was conducted between January 1, 2019 and June 30, 2020 in three hematooncological units. RESULTS: We included 3315 patients of which 217 (6.5%) were colonized by microorganisms producing ESBL and CPE. Of these, 106/217 (48.8%) had at least one episode of infection. The most frequently isolated microorganism was Klebsiella pneumoniae 29/106 (27.4%). Of those infected, 18/106 (17%) presented infection by the same colonizing microorganism. Mucositis (p = 0.002), age over 65 years (p = 0.041), hypoalbuminemia (p < 0.01), neutropenia (p < 0.01) and the presence of invasive devices (p < 0.01) demonstrated a relationship with development of infection. The presence of hypoalbuminemia (OR 3.3, CI 1.5-7.1, P < 0.01), invasive devices (OR 5.8, CI 3.0-11.4, p < 0.01) and neutropenia (OR 4.1, CI 1.5-11.4, p < 0.01) predict the development of infections.

Clinical Profile of Children With Cystic Fibrosis Surviving Through Adolescence and Beyond

Objective: To document morbidities in adolescents with cystic fibrosis (CF) from India. Methods: Details of children with cystic fibrosis surviving beyond 15 years of age were extracted from hospital records, and analyzed. Results: 43 children [Median (IQR) age 18.7 (17, 20.6) years, were enrolled. Median (IQR) body mass index was 15.82 (13.5, 19.05) kg/m2. Pseudomonas species were isolated from respiratory specimens of 34 (79%) adolescents. Allergic bronchopulmonary aspergillosis (ABPA) and Cystic fibrosis-related diabetes (CFRD) were seen in 12 (28%) and 11 (26%) patients, respectively. Conjugated hyperbilirubinemia and distal intestinal obstruction syndrome (DIOS) were diagnosed in 15 (35%) and 6 (14%) children, respectively. Pseudomonas species colonization (P=0.04) and multiple pulmonary exacerbations in last one year (P<0.001) were significant predictors of FEV1% predicted. Conclusion: Malnutrition, chronic airway colonization, ABPA, CFRD, conjugated hyperbilirubinemia and DIOS are morbidities observed in adolescents with CF in India. The data support the need for early screening of CF-associated morbidities.

Epidemiological distribution of donor infection and drug resistance of main pathogens in organ donation after citizen's death / 器官移植

Objective To analyze the distribution characteristics and drug resistance of pathogens in infected donors from organ donation after citizen's death. Methods Clinical data of 465 potential donors from organ donation after citizen's death were retrospectively analyzed. The airway secretion, urine and blood samples of all donors were cultured. The infection rate of the donors, the source and composition ratio of pathogens were summarized. The drug resistance of main Gram-negative and Gram-positive pathogens was analyzed. Results Among 465 donors, 330 cases were infected and the infection rate was 71.0%. Among the positive culture samples of all donors, lower respiratory tract samples accounted for 63.8%(292/458), 18.6%(85/458) for blood samples and 17.7%(81/458) for urine samples. A total of 512 pathogens were isolated, including 75.0%(384/512) of Gram-negative pathogens, 18.2%(93/512) of Gram-positive pathogens followed by 6.8%(35/512) of fungi. Klebsiella pneumoniae, Pseudomonas aeruginosa and Acinetobacter baumannii were the most common Gram-negative pathogens. Klebsiella pneumoniae was sensitive to quinolones, compound preparations containing β-lactamase inhibitor (piperacillin-tazobactam, cefoperazone sodium-sulbactam sodium) and carbapenem antibiotics, whereas less sensitive to cephalosporins. Pseudomonas aeruginosa was sensitive to β-lactams, quinolones and aminoglycosides. Acinetobacter baumannii was sensitive to polymyxin, tigecycline and amikacin, whereas resistant to the other antibiotics. No Gram-positive pathogens was resistant to vancomycin, linezolid and teicoplanin. Staphylococcus aureus and coagulase-negative staphylococci were the most commonly isolated Gram-positive pathogens, which yielded resistance rates of 36% and 87% to oxacillin sodium, and were generally resistant to penicillin and erythromycin. The resistance rate of Enterococcus faecalis to quinolones and erythromycin exceeded 90%, and 55% for high-concentration gentamicin. Conclusions The infection rate of organ donors from organ donation after citizen's death is relatively high, and the main infection site is lung. Gram-negative pathogens are the most commonly isolated strains, and certain strains tend to exhibit multiple drug resistance.

Donor-derived or recipient airway pathogen characteristics and the correlation with post lung transplant outcomes / 中华器官移植杂志

Objective:To explore the airway pathogen characteristics and examine the correlation between donor-derived pathogens and post-transplant outcomes in patients after lung transplantation (LT).Methods:Between January 1, 2015 and December 31, 2019, retrospective review was conducted for clinical and microbiological data of 88 LT recipients.Airway pathogen percentage of different microorganisms and evolution of drug-resistance were examined.Drug-resistant pathogen positive group (n=71) and negative group (n=17) were assigned according to whether or not drug-resistant pathogens were detected.Survival analysis was conducted by Log-rank with 3-year follow-ups.Between April 11, 2020 and September 5, 2020, prospective study was conducted in 14LT recipients.The potential pathogenic bacteria from donor lungs were detected by metagenomic next generation sequencing and the impact of those bacteria was examined on 1-year post-transplantation outcome in 2020.Microbial diversity and richness were shown with Shannon index.The outcome variables included heart rate, neutrophil count, lymphocyte count, immunoglobulin level and pulmonary spirometry.ANOVA and Pearson's correlation analysis were performed for elucidating the relationship between airway microbiota and post-LT outcomes.Results:From 2015 to 2019, 88 recipients were recruited and 992 strains of airway pathogens were isolated, including bacteria 796 strains and fungi 196 strains.Gram-negative bacteria (704 strains) accounted for 88.4% of all bacteria.The detection rates of Gram-positive bacteria, Klebsiella pneumonia (Kp), Acinetobacter baumannii (Ab), Stenotrophomonas maltophilia and Candida increased in 2019 than that in 2015 (8.2% vs. 5.3%, 13.6% vs. 13.2%, 33.2% vs. 17.5%, 6.5% vs. 5.3%, 26.6% vs. 20.2%). Drug resistance rate of Kp to imipenem was 68.18% in 2019 and drug resistance rate of Ab to imipenem 98.44%.The 3-year survival rate was 46.3% and 35.3% in drug-resistance positive and negative groups and the difference was insignificant ( P=0.410). Fourteen recipients were enrolled in 2020.Potential pathogenic bacteria could be detected in all donor samples.Five recipients carried the same bacteria and two died during 1-year follow-up.Nine recipients did not carry the donor-derived pathogens and two died during 1-year follow-up.The diversity of donor/recipient-derived airway microbiota (Shannon index) showed no correlation with the outcomes of 1-year follow-up by Pearson's correlation test. Conclusions:Gram-negative bacteria predominated in airway pathogens of recipients post-LT.The drug resistance rate to imipenem remained high.The donor/recipient-derived pathogen isolates showed no correlation with immediate outcomes post-LT.

In situ activity analysis of two-step labeling probiotics with double fluorescent probes in intestinal tract / 药学学报

Effective supplementation of probiotics can be beneficial to intestinal health, but in situ analysis of probiotics activity has rarely been reported. In this study, by coupling fluorescein 5-isothiocyanate (FITC) and 5(6)-carboxytetramethylrhodamine N-succinimidyl ester (5(6)-TAMRA-SE) with D-lysine, two fluorescent D-amino acids (FDAAs) probes were obtained: green probe (fluorescein-D-lysine, FDL) and red probe (TAMRA-D-lysine, TDL). Then, we tried to label the three kinds of probiotics, Lactobacillus acidophilus (LA), Lactobacillus casei (LC) and Veillonella atypica (VA) in vitro. FDAAs was applied to the labeling of intestinal flora in mice, and a method was established to investigate the oral survival rate of three commonly used probiotics. All animal experiments were approved by the Animal Ethics Committee of Guangzhou University of Chinese Medicine. The results show that the two synthetic FDAAs can be non-toxic and 100% for the in vitro labeling of the three probiotics. Known by FDAAs two-step labeling of oral probiotics, the high survival rate of LA was 92.30% ± 1.67%. The survival rates of VA and LC are similar, 84.13% ± 4.06% and 82.27% ± 2.43%, respectively. This study can quickly compare the changes of colonization survival rate of different probiotics in vivo, provide theoretical support for the in situ colonization activity of probiotics in the intestine, and guide the rational drug use of clinical probiotics.

The effect of different ultrasound debridement method on epiphytic bacteria of diabetic foot ulcer wound / 中国实用护理杂志

Objective:To investigate the effect of ultrasonic debridement mediated by 0.9% sodium chloride solution and 0.5% iodophor volt combined with eddy current washing and high pressure pulse washing on the removal of colonized bacteria on the wound surface of diabetic foot and wound healing.Methods:From March to November 2020, a total of 60 patients using ultrasonic therapy for debridement were divided into control group, experimental group 1, experimental group 2 and experimental group 3 by random digit table in the fourth People′s Hospital of Dalian. The final effective data collected was 15 cases in each group. The control group was given ultrasonic debridement mediated by 0.9% sodium chloride solution and eddy current washing.Experimental group 1 was given ultrasonic debridement mediated by 0.9% sodium chloride solution and high pressure pulse washing. Experimental group 2 received 0.5% iodophor mediated ultrasonic debridement and eddy current washing. Experimental group 3 0.5% iodophor mediated ultrasonic debridement and high pressure pulse washing. The size of the wound was measured, sampled and bacterial cultured before and after the first, fifth and 10th intervention. The wound bacterial clearance rate and wound area reduction rate were calculated and compared.Results:Before and after 3 interventions, the bacterial clearance rate and the total reduction of wound surface in 4 groups were increased ( P<0.01), the total bacterial clearance rate of experimental group 3 was the highest, which was (93.85 ± 9.87)%.The total reduction rate of wound in experimental group 2 was the highest, which was (20.831 4 ± 9.379 8)%. Conclusions:0.5% iodophor mediated ultrasonic debridement combined with high pressure pulse washing is the most effective way in the removal of diabetic foot wounds, and 0.5% iodophor solution mediated ultrasonic debridement combined with eddy current washing is the most effective in reducing diabetic foot wounds.

The osteogenic niche-targeted arsenic nanoparticles prevent colonization of disseminated breast tumor cells in the bone

Up to 70% of patients with late-stage breast cancer have bone metastasis. Current treatment regimens for breast cancer bone metastasis are palliative with no therapeutic cure. Disseminated tumor cells (DTCs) colonize inside the osteogenic niches in the early stage of bone metastasis. Drug delivery into osteogenic niches to inhibit DTC colonization can prevent bone metastasis from entering its late stage and therefore cure bone metastasis. Here, we constructed a 50% DSS6 peptide conjugated nanoparticle to target the osteogenic niche. The osteogenic niche was always located at the endosteum with immature hydroxyapatite. Arsenic-manganese nanocrystals (around 14 nm) were loaded in osteogenic niche-targeted PEG-PLGA nanoparticles with an acidic environment-triggered arsenic release. Arsenic formulations greatly reduced 4T1 cell adhesion to mesenchymal stem cells (MSCs)/preosteoblasts (pre-OBs) and osteogenic differentiation of osteoblastic cells. Arsenic formulations also prevented tumor cell colonization and dormancy via altering the direct interaction between 4T1 cells and MSCs/pre-OBs. The chemotactic migration of 4T1 cells toward osteogenic cells was blocked by arsenic in mimic 3D osteogenic niche. Systemic administration of osteogenic niche-targeted arsenic nanoparticles significantly extended the survival of mice with 4T1 syngeneic bone metastasis. Our findings provide an effective approach for osteogenic niche-specific drug delivery and suggest that bone metastasis can be effectively inhibited by blockage of tumor cell colonization in the bone microenvironment.