SEASONALITY OF VIRAL RESPIRATORY INFECTIONS IN SOUTHEAST OF BRAZIL: THE INFLUENCE OF TEMPERATURE AND AIR HUMIDITY


Autoria(s): Gardinassi, Luiz Gustavo; Marques Simas, Paulo Vitor; Salomao, Joao Batista; Durigon, Edison Luiz; Zanetta, Dirce Maria Trevisan; Cordeiro, Jose Antonio; Lacerda, Mauricio Nogueira; Rahal, Paula; de Souza, Fatima Pereira
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

29/10/2013

29/10/2013

2012

Resumo

Viruses are the major cause of lower respiratory tract infections in childhood and the main viruses involved are Human Respiratory Syncytial Virus (HRSV), Human Metapneumovirus (HMPV), Influenzavirus A and B (FLUA and FLUB), Human Parainfluenza Virus 1, 2 and 3 (HPIV1, 2 and 3) and Human Rhinovirus (HRV). The purposes of this study were to detect respiratory viruses in hospitalized children younger than six years and identify the influence of temperature and relative air humidity on the detected viruses. Samples of nasopharyngeal washes were collected from hospitalized children between May/2004 and September/2005. Methods of viral detection were RT-PCR, PCR and HRV amplicons were confirmed by hybridization. Results showed 54% (148/272) of viral positivity. HRSV was detected in 29% (79/272) of the samples; HRV in 23.1% (63/272); HPIV3 in 5.1% (14/272); HMPV in 3.3% (9/272); HPIV1 in 2.9% (8/272); FLUB in 1.4% (4/272), FLUA in 1.1% (3/272), and HPIV2 in 0.3% (1/272). The highest detection rates occurred mainly in the spring 2004 and in the autumn 2005. It was observed that viral respiratory infections tend to increase as the relative air humidity decreases, showing significant association with monthly averages of minimal temperature and minimal relative air humidity. In conclusion, viral respiratory infections vary according to temperature and relative air humidity and viral respiratory infections present major incidences it coldest and driest periods.

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [02/08461-2, 04/06883-2]

Identificador

BRAZILIAN JOURNAL OF MICROBIOLOGY, SAO PAULO, v. 43, n. 1, supl., Part 1-2, pp. 98-108, JAN-MAR, 2012

1517-8382

http://www.producao.usp.br/handle/BDPI/36405

10.1590/S1517-83822012000100011

http://dx.doi.org/10.1590/S1517-83822012000100011

Idioma(s)

eng

Publicador

SOC BRASILEIRA MICROBIOLOGIA

SAO PAULO

Relação

BRAZILIAN JOURNAL OF MICROBIOLOGY

Direitos

openAccess

Copyright SOC BRASILEIRA MICROBIOLOGIA

Palavras-Chave #VIRAL RESPIRATORY INFECTIONS #HRSV #HRV #TEMPERATURE #RELATIVE AIR HUMIDITY #SYNCYTIAL VIRUS-INFECTION #HUMAN METAPNEUMOVIRUS #CLIMATE-CHANGE #TRACT INFECTIONS #YOUNG-CHILDREN #HUMAN HEALTH #DISEASE #EPIDEMIOLOGY #TRANSMISSION #COMMUNITY #MICROBIOLOGY
Tipo

article

original article

publishedVersion