Relevancia a corto plazo de la coinfección viral en pacientes menores de 2 años hospitalizados con infecciones de las vías respiratorias inferiores / Short-term relevance of lower respiratory viral coinfection in inpatients under 2 years of age

Introducción: Avances en el diagnóstico molecular han hecho posible la detección de agentes virales desconocidos en infecciones de las vías respiratorias inferiores (IVRI). Sin embargo, sigue habiendo dudas relativamente a su frecuencia y relevancia. Objetivo: Comparar la clínica y la gravedad entre la infección por virus único y la coinfección en niños admitidos por IVRI. Métodos: Se realizó un estudio durante 3 años consecutivos (2012-2015) que incluyó a niños menores de 2 años ingresados por IVRI. La identificación viral se realizó mediante la técnica de PCR para 16 virus. Los datos clínicos y el uso de los recursos hospitalarios se recogieron de forma estándar durante la estancia hospitalaria y se compararon la infección única con coinfecciones virales. Resultados: Fueron analizadas 524 muestras (451 pacientes); 448 (85,5%) tuvieron al menos un virus identificado. Coinfecciones virales se encontraron en 159 (35,5%). RSV y HRV fueron los virus más frecuentes; bronquiolitis y neumonía, los diagnósticos principales. Los pacientes con coinfecciones virales eran mayores, iban a la guardería, tenían sibilancias recurrentes con más frecuencia y eran más sintomáticos al ingreso. No fueron sometidos a más exámenes, pero les fueron prescritos medicamentos con más frecuencia. El grupo de la coinfección viral no mostró una mayor duración de la estancia hospitalaria, de la necesidad de oxígeno, de UCI o soporte ventilatorio. Discusión: Nuestro estudio mostró una proporción significativa de coinfecciones virales en los niños pequeños ingresados con IVRI y confirma dados previos que muestran que la prescripción es más frecuente en las coinfecciones virales, sin asociación con peor resultado clínico (AU)

Introduction: Advances in molecular diagnosis have made it possible to detect previously unknown viral agents as causative agents of lower respiratory tract infections (LRTI). The frequency and relevance of viral coinfections is still debatable. Objective: compare clinical presentation and severity between single virus infection and viral coinfection in children admitted for LRTI. Methods: A 3-year period observational study (2012-2015) included children younger than two years admitted for LRTI. Viral identification was performed using PCR technique for 16 viruses. Clinical data and use of health resources was gathered during hospital stay using a standard collection form and we compared single virus infection and viral coinfections. Results: The study included 524 samples (451 patients); 448 (85,5%) had at least one virus identified. Viral coinfections were found in 159 (35,5%). RSV and HRV were the most commonly identified virus; bronchiolitis and pneumonia the most frequent diagnosis. Patients with viral coinfections were older, attended day-care centers, had previous recurrent wheezing more frequently and were more symptomatic at admission. These patients did not have more complementary exams performed but were prescribed medications more often. Viral coinfection group did not show longer length of hospital stay and oxygen need, more need for ICU nor ventilatory support. Discussion: Our study showed a significant proportion of viral coinfections in young infants admitted with LRTI and confirmed previous data showing that prescription was more frequent in inpatients with viral coinfections, without an association with worst clinical outcome (AU)

[Short-term relevance of lower respiratory viral coinfection in inpatients under 2 years of age]. / Relevancia a corto plazo de la coinfección viral en pacientes menores de 2 años hospitalizados con infecciones de las vías respiratorias inferiores.

INTRODUCTION: Advances in molecular diagnosis have made it possible to detect previously unknown viral agents as causative agents of lower respiratory tract infections (LRTI). The frequency and relevance of viral coinfections is still debatable. OBJECTIVE: compare clinical presentation and severity between single virus infection and viral coinfection in children admitted for LRTI. METHODS: A 3-year period observational study (2012-2015) included children younger than two years admitted for LRTI. Viral identification was performed using PCR technique for 16 viruses. Clinical data and use of health resources was gathered during hospital stay using a standard collection form and we compared single virus infection and viral coinfections. RESULTS: The study included 524 samples (451 patients); 448 (85,5%) had at least one virus identified. Viral coinfections were found in 159 (35,5%). RSV and HRV were the most commonly identified virus; bronchiolitis and pneumonia the most frequent diagnosis. Patients with viral coinfections were older, attended day-care centers, had previous recurrent wheezing more frequently and were more symptomatic at admission. These patients did not have more complementary exams performed but were prescribed medications more often. Viral coinfection group did not show longer length of hospital stay and oxygen need, more need for ICU nor ventilatory support. DISCUSSION: Our study showed a significant proportion of viral coinfections in young infants admitted with LRTI and confirmed previous data showing that prescription was more frequent in inpatients with viral coinfections, without an association with worst clinical outcome.

Short-term relevance of lower respiratory viral coinfection in inpatients under 2 years of age.

INTRODUCTION: Advances in molecular diagnosis have made it possible to detect previously unknown viral agents as causative agents of lower respiratory tract infections (LRTI). The frequency and relevance of viral coinfections is still debatable. OBJECTIVE: Compare clinical presentation and severity between single virus infection and viral coinfection in children admitted for LRTI. METHODS: A 3-year period observational study (2012-2015) included children younger than two years admitted for LRTI. Viral identification was performed using PCR technique for 16 viruses. Clinical data and use of health resources was gathered during hospital stay using a standard collection form and we compared single virus infection and viral coinfections. RESULTS: The study included 524 samples (451 patients); 448 (85.5%) had at least one virus identified. Viral coinfections were found in 159 (35.5%). RSV and HRV were the most commonly identified virus; bronchiolitis and pneumonia the most frequent diagnosis. Patients with viral coinfections were older, attended day-care centers, had previous recurrent wheezing more frequently and were more symptomatic at admission. These patients did not have more complementary exams performed but were prescribed medications more often. Viral coinfection group did not show longer length of hospital stay and oxygen need, more need for ICU nor ventilatory support. DISCUSSION: Our study showed a significant proportion of viral coinfections in young infants admitted with LRTI and confirmed previous data showing that prescription was more frequent in inpatients with viral coinfections, without an association with worst clinical outcome.

INTRODUCCIÓN: Avances en el diagnóstico molecular han hecho posible la detección de agentes virales desconocidos en infecciones de las vías respiratorias inferiores (IVRI). Sin embargo, sigue habiendo dudas relativamente a su frecuencia y relevancia. OBJETIVO: Comparar la clínica y la gravedad entre la infección por virus único y la coinfección en niños admitidos por IVRI. MÉTODOS: Se realizó un estudio durante 3 años consecutivos (2012-2015) que incluyó a niños menores de 2 años ingresados por IVRI. La identificación viral se realizó mediante la técnica de PCR para 16 virus. Los datos clínicos y el uso de los recursos hospitalarios se recogieron de forma estándar durante la estancia hospitalaria y se compararon la infección única con coinfecciones virales. RESULTADOS: Fueron analizadas 524 muestras (451 pacientes); 448 (85,5%) tuvieron al menos un virus identificado. Coinfecciones virales se encontraron en 159 (35,5%). RSV y HRV fueron los virus más frecuentes; bronquiolitis y neumonía, los diagnósticos principales. Los pacientes con coinfecciones virales eran mayores, iban a la guardería, tenían sibilancias recurrentes con más frecuencia y eran más sintomáticos al ingreso. No fueron sometidos a más exámenes, pero les fueron prescritos medicamentos con más frecuencia. El grupo de la coinfección viral no mostró una mayor duración de la estancia hospitalaria, de la necesidad de oxígeno, de UCI o soporte ventilatorio. DISCUSIÓN: Nuestro estudio mostró una proporción significativa de coinfecciones virales en los niños pequeños ingresados con IVRI y confirma dados previos que muestran que la prescripción es más frecuente en las coinfecciones virales, sin asociación con peor resultado clínico.