[Parotitis and influenza: unusual association during 2017, in Santa Fe, Argentina]. / Parotiditis e influenza: inusual asociación durante 2017, en Santa Fe, Argentina.

BACKGROUND: Parotitis is an acute viral disease characterized by swelling and pain in one or both salivary glands, submaxillary or submental, fever, headache, muscle ache and/or fatigue. AIM: To investigate the occurrence of influenza virus infection in parotitis cases in a population of Santa Fe during 2017 and analyze clinical and epidemiological characteristics of the cases. METHODS: We studied patients with diagnosis of mumps without age restriction, who came for examination from week 26 to the network of clinicians forming the Sentinel Influenza Unit in Santa Fe. RESULTS: Between epidemiological weeks 26 and 44, 22 clinical parotitis cases we enrolled. The influenza virus was detected in 68.2%, influenza A (H3N2) 93%, and influenza B, 7%. The clinical signs of cases were mild, with an average swelling development of 5 days and no complications. 74% presented with influenza-like illness in tandem with parotitis. CONCLUSIONS: This study provides evidence that a proportion of children presenting with parotitis had influenza A(H3N2) virus infection. It is necessary to implement systematic surveillance of parotitis associated with influenza and differential diagnosis even in the absence of respiratory symptoms.

Parotiditis e influenza: inusual asociación durante 2017, en Santa Fe, Argentina / Parotitis and influenza: unusual association during 2017, in Santa Fe, Argentina

Resumen Introducción: La parotiditis es una enfermedad vírica aguda caracterizada por tumefacción y dolor en una o ambas glándulas salivales, submaxilar o submentoniana, fiebre, dolor de cabeza, dolor muscular y/o fatiga. Objetivos Investigar la ocurrencia de infección por el virus influenza en casos de parotiditis en una población de Santa Fe, durante 2017 y analizar las características clínicas y epidemiológicas de los casos. Materiales y Métodos: Se estudiaron pacientes con diagnóstico de parotiditis, que acudieron a la consulta desde la semana 26 en la red de médicos que forman la Unidad Centinela de Influenza en Santa Fe. Resultados: Entre las semanas epidemiológicas 26 y 44, se incluyeron 22 casos de parotiditis clínica. El virus influenza se detectó en 68,2%, influenza A (H3N2) 93% e influenza B 7%. Los síntomas clínicos de los casos fueron leves, con una tumefacción de cinco días y sin complicaciones. El 74% presentó una enfermedad tipo influenza en conjunto con la parotiditis. Conclusiones: Este estudio evidencia que niños que presentaban parotiditis tenían una infección por el virus de la influenza A (H3N2). Es necesario implementar una vigilancia sistemática de las parotiditis asociadas con influenza y el diagnóstico diferencial, incluso en ausencia de síntomas respiratorios.

Background: Parotitis is an acute viral disease characterized by swelling and pain in one or both salivary glands, submaxillary or submental, fever, headache, muscle ache and/or fatigue. Aim: To investigate the occurrence of influenza virus infection in parotitis cases in a population of Santa Fe during 2017 and analyze clinical and epidemiological characteristics of the cases. Methods: We studied patients with diagnosis of mumps without age restriction, who came for examination from week 26 to the network of clinicians forming the Sentinel Influenza Unit in Santa Fe. Results: Between epidemiological weeks 26 and 44, 22 clinical parotitis cases we enrolled. The influenza virus was detected in 68.2%, influenza A (H3N2) 93%, and influenza B, 7%. The clinical signs of cases were mild, with an average swelling development of 5 days and no complications. 74% presented with influenza-like illness in tandem with parotitis. Conclusions: This study provides evidence that a proportion of children presenting with parotitis had influenza A(H3N2) virus infection. It is necessary to implement systematic surveillance of parotitis associated with influenza and differential diagnosis even in the absence of respiratory symptoms.

[Monitoring of activity of influenza in Santa Fe, Argentina, 2005-2010]. / Monitoreo de la actividad de influenza en Santa Fe, Argentina, 2005-2010.

BACKGROUND: Influenza viruses have a relevant public health impact. OBJECTIVE: To describe the activity of influenza and assess the morbidity and mortality impact during 2005 to 2010 in Santa Fe, Argentina. METHODS: Epidemiological and virological indicators were calculated based on sentinel surveillance. Mortality data from patients over and under the age of 65 were analyzed using the integrated autoregressive moving average model and an excess of mortality attributable to influenza was determined. RESULTS: The viral circulation effect on morbidity was measured through the evolution in the proportion of influenza-like illness (ILI) patients. Peak incidence was observed between weeks 23 and 33. An excess of deaths was identified in 2007 among patients over 65 and among those under 65 in 2009, which was related with influenza A(H3N2) and A(H1N1)pandemic virus circulation respectively, associated with a higher proportion of virus recovery and a higher ILI percentage. CONCLUSIONS: The sentinel surveillance of influenza is a simple and efficient methodology that identifies influenza trends. Our study showed that the virus has caused a rise of mortality in patients > 65 in epidemic periods associated with the H3N2 subtype and in patients < 65 in the pandemic period with the circulation ofA(HIN1)pandemic virus.

Monitoreo de la actividad de influenza en Santa Fe, Argentina, 2005-2010 / Monitoring of activity of influenza in Santa Fe, Argentina, 2005-2010

Background. Influenza viruses have a relevant public health impact. Objective. To describe the activity of influenza and assess the morbidity and mortality impact during 2005 to 2010 in Santa Fe, Argentina. Methods. Epidemiological and virological indicators were calculated based on sentinel surveillance. Mortality data from patients over and under the age of 65 were analyzed using the integrated autoregressive moving average model and an excess of mortality attributable to influenza was determined. Results. The viral circulation effect on morbidity was measured through the evolution in the proportion of influenza-like illness (ILI) patients. Peak incidence was observed between weeks 23 and 33. An excess of deaths was identified in 2007 among patients over 65 and among those under 65 in 2009, which was related with influenza A(H3N2) and A(H1N1)pandemic virus circulation respectively, associated with a higher proportion of virus recovery and a higher ILI percentage. Conclusions. The sentinel surveillance of influenza is a simple and efficient methodology that identifies influenza trends. Our study showed that the virus has caused a rise of mortality in patients > 65 in epidemic periods associated with the H3N2 subtype and in patients < 65 in the pandemic period with the circulation of A(H1N1) pandemic virus.

Introducción: Los virus influenza son agentes patógenos de gran importancia para la salud pública. Objetivos: Describir la actividad de influenza y evaluar su impacto en la morbilidad y mortalidad durante el período 2005 - 2010 en Santa Fe, Argentina. Métodos: A partir de la vigilancia centinela se han calculado indicadores epidemiológicos y virológicos. Se analizaron datos de mortalidad en mayores y menores de 65 años, utilizando el método auto-regresivo integrado de promedios móviles y se determinó el exceso de mortalidad atribuible a influenza. Resultados: El efecto de la circulación viral sobre la morbilidad se midió a través de la proporción de pacientes con ETI. El pico de incidencia se observó entre la semana 23 y 33. Se identificó exceso de muertes en 2007 en mayores de 65 años y en 2009 en menores de 65 asociado a la circulación de influenza A(H3N2) e influenza A(H1N1)pdm 2009, respectivamente, acompañado de mayor proporción de recuperación del virus y porcentaje de ETI. Conclusión: La vigilancia centinela es sencilla, oportuna e identifica la tendencia de la ocurrencia de influenza en el tiempo. Las estimaciones demuestran que el virus ha ejercido un aumento de la mortalidad en > 65 años en períodos epidémicos asociado al subtipo H3N2 y en < 65 años en período pandémico con la circulación del nuevo virus.