[Influencia de la pandemia de la COVID-19 en la distribución de la bronquiolitis aguda en España.] / Influencia de la pandemia de la COVID-19 en la distribución de la bronquiolitis aguda en España.

OBJECTIVE: Bronchiolitis is the leading cause of hospitalization in children under one year of age, with annual epidemics. Since the onset of the SARS-CoV-2 coronavirus disease pandemic (COVID-19), there has been a change in the transmission of other respiratory viruses. Our aim in this paper was to describe how COVID-19 had affected the distribution of acute bronchiolitis in our country. METHODS: We conducted a retrospective descriptive study of the cases of bronchiolitis treated in a sample of Spanish hospitals belonging to four autonomous communities. A chi-square test and Student's t- test were used to compare epidemiological and demographic variables between patients attending the hospital with bronchiolitis during January 2021-June 2021 with patients attending the hospital in the previous three years (2018-2020). RESULTS: We analyzed 6,124 cases of bronchiolitis (58.8% males and 41.2% females). The mean age was 0.5 years (SD: 0.4). In 2020, we observed a decrease of bronchiolitis cases compared to 2019 of 67%. During 2020 and 2021, the epidemic season started in January-February and peaked in June. During the first half of 2021, the highest percentage of admissions for bronchiolitis associated with RSV infection was observed in hospitals in central Spain corresponding to the Autonomous Community of Madrid (78.5% of admissions). CONCLUSIONS: The COVID-19 pandemic significantly modifies the seasonality of bronchiolitis. In our country, the flow and distribution of the disease are not uniform. It starts in the center of Spain and ends on the coast.

OBJETIVO: La bronquiolitis es la primera causa de hospitalización en menores de un año, presentándose en forma de epidemias anuales. Desde el inicio de la pandemia por la enfermedad causada por el coronavirus SARS-CoV-2 (COVID-19) se ha producido un cambio en la transmisión de otros virus respiratorios. Nuestro objetivo en este trabajo fue describir cómo había afectado la pandemia de la COVID-19 a la distribución de la bronquiolitis aguda en nuestro país. METODOS: Realizamos un estudio descriptivo retrospectivo de los casos de bronquiolitis atendidos en una muestra de hospitales españoles que pertenecían a cuatro comunidades autónomas. Empleado el test chi-cuadrado y la prueba t de Student comparamos variables epidemiológicas y demográficas de los casos de bronquiolitis atendidos durante enero de 2021 y junio 2021, con los tres años anteriores (2018-2020). RESULTADOS: Analizamos 6.124 casos de bronquiolitis (58,8% varones y 41,2% mujeres). La media de edad fue de 0,5 años (DE: 0,4). En 2020 observamos un descenso de casos de bronquiolitis con respecto a 2019 del 67%. Durante 2020 y 2021 la temporada epidémica empezó en enero-febrero y alcanzó su pico máximo en junio. Durante el primer semestre de 2021, el porcentaje más elevado de ingresos por bronquiolitis asociados a infección VRS fue observado en hospitales del centro de España correspondientes a la Comunidad Autónoma de Madrid (78,5% de los ingresos). CONCLUSIONES: La pandemia por la COVID-19 modifica de manera significativa la estacionalidad de la bronquiolitis. En nuestro país, el flujo y distribución de la enfermedad no es uniforme, comenzado por el centro peninsular y, por último, la zona litoral.

Influencia de la pandemia dela COVID-19 en la distribución de la bronquiolitis aguda en España / Influence of the pandemic of COVID-19 in distribution of acute bronchiolitis in Spain

Fundamentos: La bronquiolitis es la primera causa de hospitalización en menores de un año, presentándose en forma de epidemias anuales. Desde el inicio de la pandemia por la enfermedad causada por el coronavirus SARS-CoV-2 (COVID-19) se ha producido un cambio en la transmisión de otros virus respiratorios. Nuestro objetivo en este trabajo fue describir cómo había afectado la pandemia de la COVID-19 a la distribución de la bronquiolitis aguda en nuestro país. Métodos: Realizamos un estudio descriptivo retrospectivo de los casos de bronquiolitis atendidos en una muestra de hospitales españoles que pertenecían a cuatro comunidades autónomas. Empleado el test chi-cuadrado y la pruebat de Student comparamos variables epidemiológicas y demográficas de los casos de bronquiolitis atendidos durante enero de 2021 y junio 2021, con los tres años anteriores (2018-2020). Resultados: Analizamos 6.124 casos de bronquiolitis (58,8% varones y 41,2% mujeres). La media de edad fue de 0,5 años (DE: 0,4). En 2020 observamos un descenso de casos de bronquiolitis con respecto a 2019 del 67%. Durante 2020 y 2021 la temporada epidémica empezó en enero-febrero y alcanzó su pico máximo en junio. Durante el primer semestre de 2021, el porcentaje más elevado de ingresos por bronquiolitis asociados a infección VRS fue observado en hospitales del centro de España correspondientes a la Comunidad Autónoma de Madrid (78,5% de los ingresos). Conclusiones: La pandemia por la COVID-19 modifica de manera significativa la estacionalidad de la bronquiolitis. En nuestro país, el flujo y distribución de la enfermedad no es uniforme, comenzado por el centro peninsular y, por último, la zona litoral.(AU)

Background: Bronchiolitis is the leading cause of hospitalization in children under one year of age, with annual epidemics. Sincethe onset of the SARS-CoV-2 coronavirus disease pandemic (COVID-19), there has been a change in the transmission of other respiratory viruses. Our aim in this paper was to describe how COVID-19 had affected the distribution of acute bronchiolitis in our country. Methods: We conducted a retrospective descriptive study of the cases of bronchiolitis treated in a sample of Spanish hospitals belonging to four autonomous communities. A chi-square test and Student’s t- test were used to compare epidemiological and demographicvariables between patients attending the hospital with bronchiolitis during January 2021-June 2021 with patients attending the hospital in the previous three years (2018-2020). Results: We analyzed 6,124 cases of bronchiolitis (58.8% males and 41.2% females). The mean age was 0.5 years (SD: 0.4). In 2020, weobserved a decrease of bronchiolitis cases compared to 2019 of 67%. During 2020 and 2021, the epidemic season started in January-February and peaked in June. During the first half of 2021, the highest percentage of admissions for bronchiolitis associated with RSVinfection was observed in hospitals in central Spain corresponding to the Autonomous Community of Madrid (78.5% of admissions).Conclusions: The COVID-19 pandemic significantly modifies the seasonality of bronchiolitis. In our country, the flow and distri-bution of the disease are not uniform. It starts in the center of Spain and ends on the coast.(AU)

Human Breast Milk microRNAs, Potential Players in the Regulation of Nervous System.

Human milk is the biological fluid with the highest exosome amount and is rich in microRNAs (miRNAs). These are key regulators of gene expression networks in both normal physiologic and disease contexts, miRNAs can influence many biological processes and have also shown promise as biomarkers for disease. One of the key aspects in the regeneration of the nervous system is that there are practically no molecules that can be used as potential drugs. In the first weeks of lactation, we know that human breast milk must contain the mechanisms to transmit molecular and biological information for brain development. For this reason, our objective is to identify new modulators of the nervous system that can be used to investigate neurodevelopmental functions based on miRNAs. To do this, we collected human breast milk samples according to the time of delivery and milk states: mature milk and colostrum at term; moderate and very preterm mature milk and colostrum; and late preterm mature milk. We extracted exosomes and miRNAs and realized the miRNA functional assays and target prediction. Our results demonstrate that miRNAs are abundant in human milk and likely play significant roles in neurodevelopment and normal function. We found 132 different miRNAs were identified across all samples. Sixty-nine miRNAs had significant differential expression after paired group comparison. These miRNAs are implicated in gene regulation of dopaminergic/glutamatergic synapses and neurotransmitter secretion and are related to the biological process that regulates neuron projection morphogenesis and synaptic vesicle transport. We observed differences according to the delivery time and with less clarity according to the milk type. Our data demonstrate that miRNAs are abundant in human milk and likely play significant roles in neurodevelopment and normal function.

[Influence of donor profile on pre and post-pasteurization bacteriology of donated human milk]. / Influencia del perfil de las donantes en la bacteriología pre- y pospasteurización de la leche humana donada.

Introduction: Introduction: breastfeeding is the gold standard for infant's nutrition. Human milk bank is an essential tool to guarantee availability and safety in those situations when breastfeeding is not an option. The manipulation during the extraction of the human milk by the donors is a critical point to ensure an adequate microbiological safety. Therefore, knowing the bacterial flora that prevails in donated milk is essential to draw conclusions that can lead to taking measures in the management of the bank. Objectives: to analyze the prevalence of microorganisms in milk samples donated to the milk bank and how the bacterial flora behaves according to the profile of the donors and the donor milk circuits. Methods: the present work is a retrospective descriptive observational study that analyzes characteristics and the positive microbiological results within our milk bank samples from June 1, 2016 to December 31, 2020. All milk bank donors voluntarily signed an informed consent that authorizes the use of data to investigation. Results: during the study period, a total of 1,587 liters of raw milk were donated by 266 women, highlighting that, despite the SARS-CoV-2 virus pandemic, 2020 has been the year in which more volume of milk has been dispensed. The results show that 221 batches had at least one positive microbiological isolation (149 of them were before and 46 after pasteurization). Pre and post-pasteurization rate varies over the years with a decrease in the pre-pasteurization discard rate (3,9%) and increase in the post-pasteurization rate (5,3%). The most frequently isolated germs found in pre-pasteurization cultures were gram positive cocci and Enterobacter and a decrease in the positivity to S. aureus after establishing an eradication protocol. In post-pasteurization cultures, the most commonly found germs are Bacillus. Regarding the donor's profile, it was found a non statistically significant way that those women with the highest donation volume and/or admission of their offspring in Neonatology were associated with higher frequency of positive cultures. Conclusions: bacteriological analysis of milk samples is an essential part of quality control for a milk bank. Our results reflect a good extraction system and transportation, as well as good training from the bank's professionals. Nevertheless, improvement of processes is necessary to reduce the rate of contamination and the amount of discarded milk.

Introducción: Introducción: la leche humana es el patrón oro en la nutrición de los neonatos. Por ello, los bancos de leche se convierten en elementos esenciales para garantizar su disponibilidad y seguridad cuando la leche materna no está disponible. La manipulación que se realiza de la leche es un punto crítico para asegurar la seguridad microbiológica de las muestras. Por ello, analizar la flora de la leche donada es fundamental para tomar medidas de mejora de los bancos de leche. Objetivos: analizar los resultados microbiológicos positivos en un banco de leche humana entre las muestras de leche cruda donadas y tras su pasteurización y evaluar si existe relación entre los aislamientos, el perfil de la donante y los circuitos de leche donada. Métodos: estudio observacional descriptivo que analiza las características de la leche donada y los resultados microbiológicos positivos de muestras de leche donadas en nuestro banco desde junio de 2016 hasta diciembre de 2020. Todas las donantes firmaron un consentimiento informado. Resultados: durante el período de estudio fueron donados 1587 litros de leche cruda por 266 mujeres destacando que, a pesar de la pandemia, 2020 ha sido el año en el que más volumen se ha dispensado (280 L). Se obtuvieron 221 lotes de leche con al menos un aislamiento microbiológico positivo (14,2 % total), de ellos 149 previos y 46 posteriores a la pasteurización. La tasa de descarte pre y pospasteurización es variable a lo largo de los años con descenso en 2020 prepasteurización (3,9%) e incremento pospasteurización (5,3%). Los gérmenes más frecuentemente aislados fueron cocos grampositivos, seguidos por Enterobacterias prepasteurización detectándose un descenso en la positividad a S. aureus tras establecerse un protocolo de erradicación. En las muestras pospasteurización predomina el género Bacillus. Se ha encontrado una relación aunque no estadísticamente significativa (p > 0,05) entre mujeres con mayor volumen de donación y/o ingreso de su hijo/a en Neonatología y una mayor frecuencia cultivos positivos. Conclusiones: el análisis bacteriológico de las muestras es parte fundamental del control de calidad. Nuestros resultados traducen una buena sistemática de extracción y transporte, así como un buen entrenamiento de los profesionales del banco. No obstante, es necesario mejorar los procesos para reducir la tasa de contaminación y la cantidad de leche desechada.

Influencia del perfil de las donantes en la bacteriología pre- y pospasteurización de la leche humana donada / Influence of donor profile on pre and post-pasteurization bacteriology of donated human milk

Introducción: la leche humana es el patrón oro en la nutrición de los neonatos. Por ello, los bancos de leche se convierten en elementos esenciales para garantizar su disponibilidad y seguridad cuando la leche materna no está disponible. La manipulación que se realiza de la leche es un punto crítico para asegurar la seguridad microbiológica de las muestras. Por ello, analizar la flora de la leche donada es fundamental para tomar medidas de mejora de los bancos de leche. Objetivos: analizar los resultados microbiológicos positivos en un banco de leche humana entre las muestras de leche cruda donadas y tras su pasteurización y evaluar si existe relación entre los aislamientos, el perfil de la donante y los circuitos de leche donada. Métodos: estudio observacional descriptivo que analiza las características de la leche donada y los resultados microbiológicos positivos de muestras de leche donadas en nuestro banco desde junio de 2016 hasta diciembre de 2020. Todas las donantes firmaron un consentimiento informado. (AU)

Introduction: breastfeeding is the gold standard for infant’s nutrition. Human milk bank is an essential tool to guarantee availability and safety in those situations when breastfeeding is not an option. The manipulation during the extraction of the human milk by the donors is a critical point to ensure an adequate microbiological safety. Therefore, knowing the bacterial flora that prevails in donated milk is essential to draw conclusions that can lead to taking measures in the management of the bank. Objectives: to analyze the prevalence of microorganisms in milk samples donated to the milk bank and how the bacterial flora behaves according to the profile of the donors and the donor milk circuits. Methods: the present work is a retrospective descriptive observational study that analyzes characteristics and the positive microbiological results within our milk bank samples from June 1, 2016 to December 31, 2020. All milk bank donors voluntarily signed an informed consent that authorizes the use of data to investigation. (AU)

Lung Ultrasound Scores Progress Differently in Extreme and Very Preterm Infants after Birth: A Multicentre Prospective Study.

INTRODUCTION: The lung ultrasound score (LUS) has been suggested to predict moderate-severe bronchopulmonary dysplasia (msBPD) in preterm infants. We aimed to assess LUS evolution after birth in preterm infants and the effect of gestational age. METHODS: This multicentre prospective observational study was performed with newborns born before 33 weeks of gestation. We created two groups: group 1 (23-27 weeks) and group 2 (28-32 weeks). We compared LUSs between the groups from birth until 36 weeks of postmenstrual age, and we estimated the LUS evolution in each group with a linear multilevel mixed-effects regression model. The effects of the need for surfactant or an msBPD diagnosis were also studied. RESULTS: We included 339 patients: 122 (36%) in group 1 and 217 (64%) in group 2. The infants in group 1 showed a steady progression in the LUS from birth until 4 weeks of age and a subsequent decrease; the infants in group 2 showed a progressive decrease in the LUS throughout the study. This progression varied significantly in the first weeks of life in infants who required surfactant at birth and after the first week of life in the patients diagnosed with msBPD. DISCUSSION/CONCLUSIONS: Extremely preterm infants showed persistently high LUSs during the first weeks of life, regardless of the progression to msBPD. In this group, the infants who did not require surfactant at birth exhibited an increase in their LUSs after the first week until their values were equal to the remaining infants in their group.

Utilidad de las prostaglandinas intravenosas en el espasmo vascular neonatal / Use of intravenous prostaglandins in neonatal vasospasm

No disponible

Analysis of the impact of social determinants and primary care morbidity on population health outcomes by combining big data: A research protocol.

Background: In recent years, different tools have been developed to facilitate analysis of social determinants of health (SDH) and apply this to health policy. The possibility of generating predictive models of health outcomes which combine a wide range of socioeconomic indicators with health problems is an approach that is receiving increasing attention. Our objectives are twofold: (1) to predict population health outcomes measured as hospital morbidity, taking primary care (PC) morbidity adjusted for SDH as predictors; and (2) to analyze the geographic variability of the impact of SDH-adjusted PC morbidity on hospital morbidity, by combining data sourced from electronic health records and selected operations of the National Statistics Institute (Instituto Nacional de Estadística/INE). Methods: The following will be conducted: a qualitative study to select socio-health indicators using RAND methodology in accordance with SDH frameworks, based on indicators published by the INE in selected operations; and a quantitative study combining two large databases drawn from different Spain's Autonomous Regions (ARs) to enable hospital morbidity to be ascertained, i.e., PC electronic health records and the minimum basic data set (MBDS) for hospital discharges. These will be linked to socioeconomic indicators, previously selected by geographic unit. The outcome variable will be hospital morbidity, and the independent variables will be age, sex, PC morbidity, geographic unit, and socioeconomic indicators. Analysis: To achieve the first objective, predictive models will be used, with a test-and-training technique, fitting multiple logistic regression models. In the analysis of geographic variability, penalized mixed models will be used, with geographic units considered as random effects and independent predictors as fixed effects. Discussion: This study seeks to show the relationship between SDH and population health, and the geographic differences determined by such determinants. The main limitations are posed by the collection of data for healthcare as opposed to research purposes, and the time lag between collection and publication of data, sampling errors and missing data in registries and surveys. The main strength lies in the project's multidisciplinary nature (family medicine, pediatrics, public health, nursing, psychology, engineering, geography).

Risk factors and bronchopulmonary dysplasia severity: data from the Spanish Bronchopulmonary Dysplasia Research Network.

GEIDIS is a national-based research-net registry of patients with bronchopulmonary dysplasia (BPD) from public and private Spanish hospitals. It was created to provide data on the clinical characterization and follow-up of infants with BPD until adulthood. The purpose of this observational study was to analyze the characteristics and the impact of perinatal risk factors on BPD severity. The study included 1755 preterm patients diagnosed with BPD. Of the total sample, 90.6% (n = 1591) were less than 30 weeks of gestation. The median gestational age was 27.1 weeks (25.8-28.5) and median birth weight 885 g (740-1,070 g). A total of 52.5% (n = 922) were classified as mild (type 1), 25.3% (n = 444) were moderate (type 2), and 22.2% (n = 389) were severe BPD (type 3). In patients born at under 30 weeks' gestation, most pre-and postnatal risk factors for type 2/3 BPD were associated with the length of exposure to mechanical ventilation (MV). Independent prenatal risk factors were male gender, oligohydramnios, and intrauterine growth restriction. Postnatal risk factors included the need for FiO2 of > 0.30 in the delivery room, nosocomial pneumonia, and the length of exposure to MV. Conclusion: In this national-based research-net registry of BPD patients, the length of MV is the most important risk factor associated with type 2/3 BPD. Among type 3 BPD patients, those who required an FiO2 > .30 at 36 weeks' postmenstrual age had a higher morbidity, during hospitalization and at discharge, compared to those with nasal positive pressure but FiO2 < .30. What is Known: • BPD is a highly complex multifactorial disease associated with preterm birth. What is New: • The length of exposure to mechanical ventilation is the most important postnatal risk factor associated to bronchopulmonary severity which modulate the effect of most pre and postnatal risk factors. • Among patients with BPD, the requirement for FiO2 >.30% at 36 weeks of postmenstrual age is associated with greater morbidity during hospitalization and at discharge.

Summary of Recommendations and Key Points of the Consensus of Spanish Scientific Societies (SEPAR, SEMICYUC, SEMES; SECIP, SENEO, SEDAR, SENP) on the Use of Non-Invasive Ventilation and High-Flow Oxygen Therapy with Nasal Cannulas in Adult, Pediatric, and Neonatal Patients With Severe Acute Respiratory Failure.

Non-invasive respiratory support (NIRS) in adult, pediatric, and neonatal patients with acute respiratory failure (ARF) comprises two treatment modalities, non-invasive mechanical ventilation (NIMV) and high-flow nasal cannula (HFNC) therapy. However, experts from different specialties disagree on the benefit of these techniques in different clinical settings. The objective of this consensus was to develop a series of good clinical practice recommendations for the application of non-invasive support in patients with ARF, endorsed by all scientific societies involved in the management of adult and pediatric/neonatal patients with ARF. To this end, the different societies involved were contacted, and they in turn appointed a group of 26 professionals with sufficient experience in the use of these techniques. Three face-to-face meetings were held to agree on recommendations (up to a total of 71) based on a literature review and the latest evidence associated with 3 categories: indications, monitoring and follow-up of NIRS. Finally, the experts from each scientific society involved voted telematically on each of the recommendations. To classify the degree of agreement, an analog classification system was chosen that was easy and intuitive to use and that clearly stated whether the each NIRS intervention should be applied, could be applied, or should not be applied.

Clínica diferencial en niños infectados por SARS-CoV-2, trazabilidad de contactos y rentabilidad de pruebas diagnósticas: estudio observacional transversal / Differential clinic in children infected by SARS-CoV-2, traceability of contacts and cost-effectiveness of diagnostic tests: Cross-sectional observational study

INTRODUCCIÓN: Ante la posible coexistencia de la infección por el virus SARS-CoV-2 con otras infecciones estacionales, se pretende identificar síntomas diferenciales. Se ha estudiado el papel de los niños en el contagio intrafamiliar y la sensibilidad de la reacción en cadena de la polimerasa con transcriptasa inversa (RT-PCR) en un área con baja transmisión comunitaria. MATERIAL Y MÉTODOS: Estudio observacional transversal. Pacientes entre 0-15 años estudiados por técnica RT-PCR por sospecha clínica de infección por virus SARS-CoV-2 en los meses de marzo-mayo del 2020. Encuesta sobre síntomas y contactos. Determinación de anticuerpos anti-SARS-CoV-2 al menos 21 días después del test RT- PCR. RESULTADOS: Se incluyó a 126 pacientes, 33 con infección confirmada y edad media 8,4 años (IC del 95%, 6,8-10,0) superior a los no infectados. La fiebre fue el síntoma más común y con mayor sensibilidad. Las diferencias encontradas fueron una mayor frecuencia de anosmia (p = 0,029) y cefalea (p = 0,009) entre los niños infectados con una especificidad del 96,7 y el 81,5% respectivamente. No hubo diferencias en la duración de los síntomas. Un 81,8% de los infectados fue probablemente contagiado en el núcleo familiar, en un 85,2% por un progenitor que trabajaba fuera del hogar. La sensibilidad de RT-PCR fue 70,9% y su valor predictivo negativo 91,1%. CONCLUSIONES: El cuadro clínico es inespecífico y los síntomas más específicos difíciles de detectar en niños más pequeños. Los niños tuvieron un papel reducido en la transmisión intrafamiliar. La sensibilidad de la RT-PCR podría estar relacionada con una menor contagiosidad infantil tras una semana de infección

INTRODUCTION: Given the possible coexistence of infection by the SARS-CoV-2 with other seasonal infections, the aim is to identify differential symptoms. I know has studied the role of children in intrafamily contagion and the sensitivity of reverse transcriptase polymerase chain reaction (RT-PCR) in an area with low community transmission. MATERIAL AND METHODS: Cross-sectional observational study. Patients between 0-15 years studied by RT-PCR technique due to clinical suspicion of infection by SARS-CoV-2 virus in the months of March-May 2020. Survey on symptoms and contacts. Determination of Anti-SARS-CoV-2 antibodies at least 21 days after the RT-PCR test. RESULTS: 126 patients were included, 33 with confirmed infection and age mean 8.4 years (95% CI 6.8-10,5) higher than not infected. Fever was the most common and with greater sensitivity. The differences found were a greater frequency of anosmia (P = 0.029) and headache (P = .009) among children infected with a specificity of 96.7% and 81.5% respectively. There were no differences in the duration of the symptoms. 81.8% of those infected were probably infected in the nucleus 85.2% by a parent who worked outside the home. The sensitivity of RT-PCR was 70.9% and its negative predictive value 91.1%. CONCLUSIONS: The clinical picture is nonspecific and the symptoms more specific difficult to detect in younger children. Children had a reduced role in the intrafamily transmission. The sensitivity of RT-PCR could be related to a less contagiousness in children after one week of infection

Differential clinic in children infected by SARS-CoV-2, traceability of contacts and cost-effectiveness of diagnostic tests: Cross-sectional observational study.

INTRODUCTION: Given the possible coexistence of infection by the SARS-CoV-2 with other seasonal infections, the aim is to identify differential symptoms. The role of children in intrafamily contagion and the sensitivity of reverse transcriptase polymerase chain reaction (RT-PCR) in an area with low community transmission has been studied. MATERIAL AND METHODS: Cross-sectional observational study. Patients between 0-15 years studied by RT-PCR technique due to clinical suspicion of infection by SARS-CoV-2 virus in the months of March-May 2020. Survey on symptoms and contacts. Determination of Anti-SARS-CoV-2 antibodies at least 21 days after the RT-PCR test. RESULTS: 126 patients were included, 33 with confirmed infection and age mean 8.4 years (95% CI 6.8-10.5) higher than not infected. Fever was the most common and with greater sensitivity. The differences found were a greater frequency of anosmia (P = .029) and headache (P = .009) among children infected with a specificity of 96.7% and 81.5% respectively. There were no differences in the duration of the symptoms. 81.8% of those infected were probably infected in the nucleus 85.2% by a parent who worked outside the home. The sensitivity of RT-PCR was 70.9% and its negative predictive value 91.1%. CONCLUSIONS: The clinical picture is nonspecific and the symptoms more specific difficult to detect in younger children. Children had a reduced role in the intrafamily transmission. The sensitivity of RT-PCR could be related to a less contagiousness in children after one week of infection.

INTRODUCCIÓN: Ante la posible coexistencia de la infección por el virus SARS-CoV-2 con otras infecciones estacionales, se pretende identificar síntomas diferenciales. Se ha estudiado el papel de los niños en el contagio intrafamiliar y la sensibilidad de la reacción en cadena de la polimerasa con transcriptasa inversa (RT-PCR) en un área con baja transmisión comunitaria. MATERIAL Y MÉTODOS: Estudio observacional transversal. Pacientes entre 0-15 años estudiados por técnica RT-PCR por sospecha clínica de infección por virus SARS-CoV-2 en los meses de marzo-mayo del 2020. Encuesta sobre síntomas y contactos. Determinación de anticuerpos anti-SARS-CoV-2 al menos 21 días después del test RT- PCR. RESULTADOS: Se incluyó a 126 pacientes, 33 con infección confirmada y edad media 8,4 años (IC del 95%, 6,8-10,0) superior a los no infectados. La fiebre fue el síntoma más común y con mayor sensibilidad. Las diferencias encontradas fueron una mayor frecuencia de anosmia (p = 0,029) y cefalea (p = 0,009) entre los niños infectados con una especificidad del 96,7 y el 81,5% respectivamente. No hubo diferencias en la duración de los síntomas.Un 81,8% de los infectados fue probablemente contagiado en el núcleo familiar, en un 85,2% por un progenitor que trabajaba fuera del hogar. La sensibilidad de RT-PCR fue 70,9% y su valor predictivo negativo 91,1%. CONCLUSIONES: El cuadro clínico es inespecífico y los síntomas más específicos difíciles de detectar en niños más pequeños. Los niños tuvieron un papel reducido en la transmisión intrafamiliar. La sensibilidad de la RT-PCR podría estar relacionada con una menor contagiosidad infantil tras una semana de infección.

Assessment of biological matrices for the detection of in utero cannabis exposure.

Cannabis consumption has been increasing worldwide among pregnant women. Due to the negative effects of prenatal cannabis exposure, it is necessary to develop an objective, sensitive, and specific method to determine cannabinoids use during pregnancy. In this study, we compared four different biological samples, maternal hair, meconium, umbilical cord, and placenta, for the detection of in utero cannabis exposure. The biological samples were collected from 627 mother-newborn dyads. All hair and meconium samples were analyzed, and umbilical cord and placenta if hair and/or meconium were positive for cannabinoids. Meconium and hair showed to complement each other, with an agreement between hair and meconium results of 96.7% but only 34.3% if just positive results were considered. Umbilical cord and placenta results showed a better agreement with meconium (91.3% and 92.6%, respectively) than with hair (39.1% and 34.6%, respectively). The predominant metabolites in meconium were 11-nor-carboxy-THC (THCCOOH) and 8,11-dihydroxy-THC (diOHTHC), and in umbilical cord and placenta was THCCOOH-glucuronide. Cannabidiol (CBD) and cannabinol (CBN) were detected in meconium but not in any umbilical cord or placenta. For the first time, prenatal marijuana exposure was analyzed and compared in paired hair, meconium, umbilical cord, and placental samples. Hair and meconium positivity rate was similar, but a more sensitive and specific analytical method for the hair may resolve discrepancies between the matrices. Umbilical cord and placenta may be considered suitable alternative matrices to meconium through the determination of THCCOOH-glucuronide as a biomarker of cannabis exposure.

The Predictive Value of Lung Ultrasound Scores in Developing Bronchopulmonary Dysplasia: A Prospective Multicenter Diagnostic Accuracy Study.

BACKGROUND: Different lung ultrasound (LUS) scanning protocols have been used, and the results in terms of diagnostic accuracy are heterogeneous. RESEARCH QUESTIONS: What is the diagnostic accuracy of the LUS score to predict moderate to severe bronchopulmonary dysplasia (msBPD)? Does scanning of posterior lung fields improve the diagnostic accuracy? STUDY DESIGN AND METHODS: This was a multicenter prospective, observational study in six centers. Two LUS aeration scores, one involving only anterolateral lung fields and the other adding the posterior fields were obtained at birth, on the third day of life (DOL), on the seventh DOL, on the 14th DOL, and on the 21st DOL. The diagnostic accuracy of both scores to predict msBPD was assessed at each time point. RESULTS: Eight hundred thirty-two LUS examinations in 298 infants were included. Both LUS score using anterolateral and posterior fields and LUS score using only anterolateral fields showed a similar moderate diagnostic accuracy to predict msBPD on the third DOL (area under the receiver operating characteristic curve [AUC] 95% CI, 0.68-0.85 vs 0.68-0.85; P = .97), seventh DOL (AUC 95% CI, 0.74-0.85 vs 0.74-0.84; P = .26), and 21st DOL (AUC 95% CI, 0.72-0.86 vs 0.74-0.88; P = .17). The LUS score using anterolateral and posterior fields was slightly more accurate at 14th DOL (AUC 95% CI, 0.69-0.83 vs 0.66-0.80; P = .01). A cutoff of 8 points in the LUS score using only anterolateral fields on the seventh DOL provided a sensitivity, specificity, positive likelihood ratio, and negative likelihood ratio of 70%, 79%, 3.3, and 0.38, respectively, to predict msBPD. Adding gestational age (GA) and sex improved the discriminative value without significant differences compared with a predictive model based on multiple clinical variables: AUC 95% CI, 0.77-0.88 vs 0.80-0.91 (P = .52). INTERPRETATION: The LUS score is able to predict msBPD from the third DOL with a moderate diagnostic accuracy. Scanning posterior lung fields slightly improved diagnostic accuracy only at the 14th DOL. Adding GA and sex improves the diagnostic accuracy of the LUS scores. The LUS score is useful to stratify BPD risk early after birth.

[Differential clinic in children infected by SARS-CoV-2, traceability of contacts and cost-effectiveness of diagnostic tests: Cross-sectional observational study]. / Clínica diferencial en niños infectados por SARS-CoV-2, trazabilidad de contactos y rentabilidad de pruebas diagnósticas: estudio observacional transversal.

INTRODUCTION: Given the possible coexistence of infection by the SARS-CoV-2 with other seasonal infections, the aim is to identify differential symptoms. There has been studied the role of children in intrafamily contagion and the sensitivity of reverse transcriptase polymerase chain reaction (RT-PCR) in an area with low community transmission. MATERIAL AND METHODS: Cross-sectional observational study. Patients between 0-15 years studied by RT-PCR technique due to clinical suspicion of infection by SARS-CoV-2 virus in the months of March-May 2020. Survey on symptoms and contacts. Determination of Anti-SARS-CoV-2 antibodies at least 21 days after the RT-PCR test. RESULTS: 126 patients were included, 33 with confirmed infection and mean age 8.4 years (95% CI 6.8-10,5), age higher than not infected. Fever was the most common symptom and with greater sensitivity. The differences found were a greater frequency of anosmia (P=0.029) and headache (P=.009) among children infected with a specificity of 96.7% and 81.5% respectively. There were no differences in the duration of the symptoms. 81.8% of those infected were probably infected in the family nucleus, 85.2% by a parent who worked outside the home. The sensitivity of RT-PCR was 70.9% and its negative predictive value 91.1%. CONCLUSIONS: The clinical picture is nonspecific and the more specific symptoms difficult to detect in younger children. Children had a reduced role in the intrafamily transmission. The sensitivity of RT-PCR could be related to a less contagiousness in children after one week of infection.

Drug testing in biological samples vs. maternal surveys for the detection of substance use during whole pregnancy.

BACKGROUND: Early diagnosis of nicotine, ethanol and drug use during pregnancy is critical in order to provide adequate care. Current screening procedures show limitations in terms of reliability and short windows of detection. OBJECTIVES: To investigate the prevalence and identify biomarkers of substance use and changes in substance use during pregnancy. To compare drug testing results in different types of biological samples (maternal hair, meconium, placenta, umbilical-cord) with self-reported data. PARTICIPANTS AND SETTING: Prospective cohort study using data from pregnant women and their newborns. METHODS: Biological matrices were collected at birth and analyzed by liquid chromatography tandem mass spectrometry. A paper survey was provided to determine substance use habits. RESULTS: 867 mother-newborn pairs were included. According to the analysis of biological samples, 29.1% cases were positive for one or more substances (13.6% nicotine, 8.4% ethanol, 8.3% cocaine, 6.4% cannabis, 5.7% opioids). The profile of the substance-using mother was a single woman, <28 years-old, with no higher education and unemployed. Segmental maternal hair analysis showed a decrease in tobacco, cannabis and cocaine use throughout pregnancy (p < 0.001). The level of concordance between results from interviews and from biological analyses was weak for opioids, cocaine, and cannabis (kappa coefficient < 0.40). Maternal hair detected the highest number of cases, followed by meconium and by placenta and/or umbilical-cord. CONCLUSIONS: Maternal survey was not a reliable screening technique. Analysis of maternal hair detected the highest number of cases with the broadest detection window (whole pregnancy).

Subtle olfactory dysfunction after SARS-CoV-2 virus infection in children.

OBJECTIVES: Anosmia/hyposomia have been described as early signs of COVID-19 infection in adults, including young asymptomatic patients who commonly refer olfactory disfunction as their only clinical manifestation. Very few studies involving paediatric age patients have been published until now. This study aims to determine the presence of olfactory dysfunction in children with COVID-19 infection through the use of a self-reported questionnaire and a new olfactory screening tool. METHODS: Nested case-control study. All paediatric patients screened by reverse transcription polymerase chain reaction (RT-PCR) and Anti-SARS-CoV-2 antibodies for COVID-19 infection, during the study period (March-May 2020), were asked to respond to a questionnaire about symptoms of olfactory disfunction. Patients above six years old also performed an odor identification test based on seven odorants (Kradeo®). This test was designed based on our cultural context and eating habits. RESULTS: 126 patients were recruited, including 33 with COVID-19 infection. 15% of the infected children referred anosmia and/or dysgeusia on the questionnaire, all of them were older than eleven years. The results of the odor test (69 patients) revealed subtle disturbances in the infected group (mostly misrecognition of odorants). Median odorant recognition was 3 odors [Interquartile range (IQR) 2-4] in case group and 4 [IQR 3-5] in controls. Male patients showed significantly larger disturbances than girls in both groups (p = 0.03). CONCLUSION: Self-referred prevalence of olfactory disfunction in our sample of infected children is lower than that described in adults, especially among the youngest ones, maybe due to immature development of angiotensin-converting enzyme 2 (ACE2) receptors expressed in nasal mucosa. Nevertheless, one month after infection, subtle disturbances (misrecognition of odors) were identified among the infected children. This screening olfactory test provides a hygienic, user-friendly tool, suitable for screening children older than six years of age.