Neurological manifestations temporally associated with SARS-CoV-2 infection in pediatric patients in Mexico.

PURPOSE: To describe the temporal association of specific acute neurological symptoms in pediatric patients with confirmed SARS-CoV-2 infection between May and August 2020. METHODS: We performed a recollection of all the clinical and laboratory data of patients having acute neurological symptoms temporally associated with SARS-CoV-2 infection at a third-level referral hospital in Mexico City (Instituto Nacional de Pediatría). Patients in an age group of 0-17 years with acute neurological signs (including ascending weakness with areflexia, diminished visual acuity, encephalopathy, ataxia, stroke, or weakness with plasma creatinine kinase (CK) elevation) were evaluated. RESULTS: Out of 23 patients with neurological manifestations, 10 (43%) had a confirmed SARS-CoV-2 infection. Among the infected patients, 5 (50%) were males aged 2-16 years old (median age 11.8 years old). Four (40%) patients confirmed a close contact with a relative positive for SARS-CoV-2, while 6 (60%) cases had a history of SARS-CoV-2-related symptoms over the previous 2 weeks. The following diagnoses were established: 3 cases of GBS, 2 of ON, 2 of AIS, one of myositis with rhabdomyolysis, one ACA, and one of anti-NMDA-R encephalitis. CONCLUSIONS: Neurological manifestations temporally associated with SARS-CoV-2 infection were noticed in the pediatric population even without respiratory symptoms. In this study, 2 of 6 symptomatic patients had mild respiratory symptoms and 4 had unspecific symptoms. During this pandemic, SARS-CoV-2 infection should be considered as etiology in patients with acute neurological symptoms, with or without previous respiratory manifestations, particularly in teenagers.

Seroprevalence of Bordetella pertussis in pediatric healthcare workers at the Hospital Infantil de México Federico Gómez.

Background: Bordetella pertussis is the causative agent of pertussis, a disease that is preventable by vaccination but has a high mortality, particularly in children < 6 months. Reports of pertussis outbreaks in hospitals show that the index case is usually an adult. In adults, the disease manifests mainly with persistent cough. The purpose of this study was to determine the seroprevalence of B. pertussis in the health personnel of a pediatric hospital in a country where vaccination of this staff is not considered mandatory. Methods: Nursing staff and resident doctors who were involved in direct treatment with hospitalized patients participated in the study. Each participant was screened for immunoglobulin G anti-pertussis toxin antibodies (anti-PT), and a questionnaire was applied for clinical and demographic data. Results: Ninety-three individuals were included, of which 85% were nurses, median age 35 years (interquartile range: 29-42.5). The participants worked in the emergency department (21.5%), in the Pediatric Intensive Care Unit (8.6%), and in the Neonatal Intensive Care Unit (6.5%). Detectable titers of anti-TP antibodies were found in 18.3%, of which 53% presented titles suggestive of recent infection and only 23.5% cough > 2 weeks of duration. Conclusions: Health personnel are at risk of suffering from the disease and be potential transmitters to infants, who may die from this cause. This study suggests that the current vaccination policies in health personnel should be modified to determine the compulsory nature of the vaccination, especially in those individuals in charge of the care of the pediatric population.

Introducción: Bordetella pertussis es el agente causal de la tosferina, una enfermedad de alta letalidad, especialmente en menores de 6 meses, pero prevenible mediante la vacunación. Los reportes en hospitales de brotes de tosferina muestran que el caso índice suelen ser personas adultas. En adultos, la enfermedad se manifiesta principalmente con tos persistente. El propósito de este estudio fue conocer la seroprevalencia de B. pertussis en el personal de salud de un hospital pediátrico en un país donde aún no se considera la vacunación obligatoria para los empleados. Métodos: Participaron personal de enfermería y médicos residentes en trato directo con pacientes hospitalizados. A cada participante se le realizó detección de anticuerpos inmunoglobulina G, antitoxina de pertussis (anti-TP) y se le aplicó un cuestionario para datos clínicos y demográficos. Resultados: Se incluyeron 93 individuos, el 85% de personal de enfermería con mediana de edad de 35 años (rango intercuartil: 29-42.5). El 21.5% de los participantes laboraban en el Servicio de Urgencias, el 8.6%, en la Unidad de Terapia Intensiva Pediátrica, el 6.5%, en la Unidad de Cuidados Intensivos Neonatales. Se encontraron títulos detectables de anticuerpos anti-TP en el 18.3%, de los cuales, el 53% presentaron títulos de infección reciente y solamente el 23.5%, historia de tos de más de dos semanas de evolución. Conclusiones: El personal de salud está en riesgo de sufrir la enfermedad y de transmitirla a los lactantes, quienes pueden fallecer por esta causa. Este estudio sugiere que las políticas actuales de vacunación en personal de salud se deben de modificar para determinar obligatoriedad de la vacuna, especialmente en quienes atienden a la población pediátrica.

Seroprevalencia de Bordetella pertussis en el personal de enfermería y médicos residentes del Hospital Infantil de México Federico Gómez / Seroprevalence of Bordetella pertussis in pediatric healthcare workers at the Hospital Infantil de México Federico Gómez

Resumen Introducción Bordetella pertussis es el agente causal de la tosferina, una enfermedad de alta letalidad, especialmente en menores de 6 meses, pero prevenible mediante la vacunación. Los reportes en hospitales de brotes de tosferina muestran que el caso índice suelen ser personas adultas. En adultos, la enfermedad se manifiesta principalmente con tos persistente. El propósito de este estudio fue conocer la seroprevalencia de B. pertussis en el personal de salud de un hospital pediátrico en un país donde aún no se considera la vacunación obligatoria para los empleados. Métodos Participaron personal de enfermería y médicos residentes en trato directo con pacientes hospitalizados. A cada participante se le realizó detección de anticuerpos inmunoglobulina G, antitoxina de pertussis (anti-TP) y se le aplicó un cuestionario para datos clínicos y demográficos. Resultados Se incluyeron 93 individuos, el 85% de personal de enfermería con mediana de edad de 35 años (rango intercuartil: 29-42.5). El 21.5% de los participantes laboraban en el Servicio de Urgencias, el 8.6%, en la Unidad de Terapia Intensiva Pediátrica, el 6.5%, en la Unidad de Cuidados Intensivos Neonatales. Se encontraron títulos detectables de anticuerpos anti-TP en el 18.3%, de los cuales, el 53% presentaron títulos de infección reciente y solamente el 23.5%, historia de tos de más de dos semanas de evolución. Conclusiones El personal de salud está en riesgo de sufrir la enfermedad y de transmitirla a los lactantes, quienes pueden fallecer por esta causa. Este estudio sugiere que las políticas actuales de vacunación en personal de salud se deben de modificar para determinar obligatoriedad de la vacuna, especialmente en quienes atienden a la población pediátrica.

Abstract Background Bordetella pertussis is the causative agent of pertussis, a disease that is preventable by vaccination but has a high mortality, particularly in children < 6 months. Reports of pertussis outbreaks in hospitals show that the index case is usually an adult. In adults, the disease manifests mainly with persistent cough. The purpose of this study was to determine the seroprevalence of B. pertussis in the health personnel of a pediatric hospital in a country where vaccination of this staff is not considered mandatory. Methods Nursing staff and resident doctors who were involved in direct treatment with hospitalized patients participated in the study. Each participant was screened for immunoglobulin G anti-pertussis toxin antibodies (anti-PT), and a questionnaire was applied for clinical and demographic data. Results Ninety-three individuals were included, of which 85% were nurses, median age 35 years (interquartile range: 29-42.5). The participants worked in the emergency department (21.5%), in the Pediatric Intensive Care Unit (8.6%), and in the Neonatal Intensive Care Unit (6.5%). Detectable titers of anti-TP antibodies were found in 18.3%, of which 53% presented titles suggestive of recent infection and only 23.5% cough > 2 weeks of duration. Conclusions Health personnel are at risk of suffering from the disease and be potential transmitters to infants, who may die from this cause. This study suggests that the current vaccination policies in health personnel should be modified to determine the compulsory nature of the vaccination, especially in those individuals in charge of the care of the pediatric population.

Dose response and efficacy of a live, attenuated human rotavirus vaccine in Mexican infants.

OBJECTIVE: Immunization against rotavirus has been proposed as the most cost-effective intervention to reduce the disease burden associated with this infection worldwide. The objective of this study was to determine the dose response, immunogenicity, and efficacy of 2 doses of an oral, attenuated monovalent G1[P8] human rotavirus vaccine in children from the same setting in Mexico, where the natural protection against rotavirus infection was studied. METHODS: From June 2001 through May 2003, 405 healthy infants were randomly assigned to 1 of 3 vaccine groups (virus concentrations 10(4.7), 10(5.2), and 10(5.8) infectious units) and to a placebo group and were monitored to the age of 2 years. The vaccine/placebo was administered concurrently with diphtheria-tetanus toxoid-pertussis/hepatitis B/Haemophilus influenzae type b vaccine at 2 and 4 months of age. After the administration of the first vaccine/placebo dose, weekly home visits to collect information regarding infant health were conducted. Stool samples were collected during each gastroenteritis episode and tested for rotavirus antigen and serotype. RESULTS: The vaccine was well tolerated and induced a greater rate of seroconversion than observed in infants who received placebo. For the pooled vaccine groups, efficacy after 2 oral doses was 80% and 95% against any and severe rotavirus gastroenteritis, respectively. Efficacy was 100% against severe rotavirus gastroenteritis and 70% against severe gastroenteritis of any cause with the vaccine at the highest virus concentration (10(5.8) infectious units). The predominant infecting rotavirus serotype in this cohort was wild-type G1 (85%). Adverse events, including fever, irritability, loss of appetite, cough, diarrhea, and vomiting, were similar among vaccinees and placebo recipients. CONCLUSION: This new oral, live, attenuated human rotavirus vaccine was safe, immunogenic, and highly efficacious in preventing any and, more importantly, severe rotavirus gastroenteritis in healthy infants. This vaccine produced comparable protection to natural infection.