Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity
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...
Main Authors: | , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Sociedade Brasileira de Microbiologia
2012-03-01
|
Series: | Brazilian Journal of Microbiology |
Subjects: | |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100011 |
id |
doaj-db1564fe33bf4e64ac3256aa7dd5d982 |
---|---|
record_format |
Article |
spelling |
doaj-db1564fe33bf4e64ac3256aa7dd5d9822020-11-24T23:10:30ZengSociedade Brasileira de MicrobiologiaBrazilian Journal of Microbiology1517-83821678-44052012-03-014319810810.1590/S1517-83822012000100011Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidityLuiz Gustavo GardinassiPaulo Vitor Marques SimasJoão Batista SalomãoEdison Luiz DurigonDirce Maria Zanetta TrevisanJosé Antonio CordeiroMauricio Nogueira LacerdaPaula RahalFátima Pereira de SouzaViruses 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100011Viral Respiratory InfectionsHRSVHRVTemperatureRelative Air Humidity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Luiz Gustavo Gardinassi Paulo Vitor Marques Simas João Batista Salomão Edison Luiz Durigon Dirce Maria Zanetta Trevisan José Antonio Cordeiro Mauricio Nogueira Lacerda Paula Rahal Fátima Pereira de Souza |
spellingShingle |
Luiz Gustavo Gardinassi Paulo Vitor Marques Simas João Batista Salomão Edison Luiz Durigon Dirce Maria Zanetta Trevisan José Antonio Cordeiro Mauricio Nogueira Lacerda Paula Rahal Fátima Pereira de Souza Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity Brazilian Journal of Microbiology Viral Respiratory Infections HRSV HRV Temperature Relative Air Humidity |
author_facet |
Luiz Gustavo Gardinassi Paulo Vitor Marques Simas João Batista Salomão Edison Luiz Durigon Dirce Maria Zanetta Trevisan José Antonio Cordeiro Mauricio Nogueira Lacerda Paula Rahal Fátima Pereira de Souza |
author_sort |
Luiz Gustavo Gardinassi |
title |
Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity |
title_short |
Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity |
title_full |
Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity |
title_fullStr |
Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity |
title_full_unstemmed |
Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity |
title_sort |
seasonality of viral respiratory infections in southeast of brazil: the influence of temperature and air humidity |
publisher |
Sociedade Brasileira de Microbiologia |
series |
Brazilian Journal of Microbiology |
issn |
1517-8382 1678-4405 |
publishDate |
2012-03-01 |
description |
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. |
topic |
Viral Respiratory Infections HRSV HRV Temperature Relative Air Humidity |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100011 |
work_keys_str_mv |
AT luizgustavogardinassi seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity AT paulovitormarquessimas seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity AT joaobatistasalomao seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity AT edisonluizdurigon seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity AT dircemariazanettatrevisan seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity AT joseantoniocordeiro seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity AT mauricionogueiralacerda seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity AT paularahal seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity AT fatimapereiradesouza seasonalityofviralrespiratoryinfectionsinsoutheastofbraziltheinfluenceoftemperatureandairhumidity |
_version_ |
1725607003287453696 |