Seasonal variation of hepatitis A virus infection in the city of Rio de Janeiro, Brazil
Hepatitis A virus (HAV) infection constitutes a major public health problem in Brazil. The transmission of HAV is primarily by fecal-oral route so the water is an important vehicle of HAV dissemination. There is a great incidence of acute cases of hepatitis A in some areas of Brazil however the seas...
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Universidade de São Paulo (USP)
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ftdoajarticles:oai:doaj.org/article:664bb7694a4f4e11a5b77c1747c9ebb9 2024-09-09T19:26:15+00:00 Seasonal variation of hepatitis A virus infection in the city of Rio de Janeiro, Brazil Livia Melo VILLAR Vanessa Salete DE PAULA Ana Maria Coimbra GASPAR 2002-10-01T00:00:00Z https://doaj.org/article/664bb7694a4f4e11a5b77c1747c9ebb9 EN eng Universidade de São Paulo (USP) http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652002000500011&tlng=en https://doaj.org/toc/1678-9946 1678-9946 https://doaj.org/article/664bb7694a4f4e11a5b77c1747c9ebb9 Revista do Instituto de Medicina Tropical de São Paulo, Vol 44, Iss 5, Pp 289-292 (2002) Hepatitis A Seasonal variation Rio de Janeiro Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2002 ftdoajarticles 2024-08-05T17:49:31Z Hepatitis A virus (HAV) infection constitutes a major public health problem in Brazil. The transmission of HAV is primarily by fecal-oral route so the water is an important vehicle of HAV dissemination. There is a great incidence of acute cases of hepatitis A in some areas of Brazil however the seasonal variation of these cases was not documented. The aim of this study was to determine the seasonality of HAV infection in Rio de Janeiro. From January 1999 to December 2001, 1731 blood samples were collected at the National Reference Center for Hepatitis Viruses in Brazil (NRCHV). These samples were tested by a commercial enzyme-immunoassay to detect anti-HAV IgM antibodies. Yearly positive rates were 33.74% in 1999, 32.19% in 2000, and 30.63% in 2001. A seasonal variation was recognized with the highest incidence in spring and summer. Furthermore a seasonal increase in incidence of HAV infection was found during the rainy season (December to March) because the index of rains is very high. It is concluded that HAV infections occur all year round with a peak during hot seasons with great number of rains. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Hepatitis A Seasonal variation Rio de Janeiro Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Hepatitis A Seasonal variation Rio de Janeiro Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Livia Melo VILLAR Vanessa Salete DE PAULA Ana Maria Coimbra GASPAR Seasonal variation of hepatitis A virus infection in the city of Rio de Janeiro, Brazil |
topic_facet |
Hepatitis A Seasonal variation Rio de Janeiro Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Hepatitis A virus (HAV) infection constitutes a major public health problem in Brazil. The transmission of HAV is primarily by fecal-oral route so the water is an important vehicle of HAV dissemination. There is a great incidence of acute cases of hepatitis A in some areas of Brazil however the seasonal variation of these cases was not documented. The aim of this study was to determine the seasonality of HAV infection in Rio de Janeiro. From January 1999 to December 2001, 1731 blood samples were collected at the National Reference Center for Hepatitis Viruses in Brazil (NRCHV). These samples were tested by a commercial enzyme-immunoassay to detect anti-HAV IgM antibodies. Yearly positive rates were 33.74% in 1999, 32.19% in 2000, and 30.63% in 2001. A seasonal variation was recognized with the highest incidence in spring and summer. Furthermore a seasonal increase in incidence of HAV infection was found during the rainy season (December to March) because the index of rains is very high. It is concluded that HAV infections occur all year round with a peak during hot seasons with great number of rains. |
format |
Article in Journal/Newspaper |
author |
Livia Melo VILLAR Vanessa Salete DE PAULA Ana Maria Coimbra GASPAR |
author_facet |
Livia Melo VILLAR Vanessa Salete DE PAULA Ana Maria Coimbra GASPAR |
author_sort |
Livia Melo VILLAR |
title |
Seasonal variation of hepatitis A virus infection in the city of Rio de Janeiro, Brazil |
title_short |
Seasonal variation of hepatitis A virus infection in the city of Rio de Janeiro, Brazil |
title_full |
Seasonal variation of hepatitis A virus infection in the city of Rio de Janeiro, Brazil |
title_fullStr |
Seasonal variation of hepatitis A virus infection in the city of Rio de Janeiro, Brazil |
title_full_unstemmed |
Seasonal variation of hepatitis A virus infection in the city of Rio de Janeiro, Brazil |
title_sort |
seasonal variation of hepatitis a virus infection in the city of rio de janeiro, brazil |
publisher |
Universidade de São Paulo (USP) |
publishDate |
2002 |
url |
https://doaj.org/article/664bb7694a4f4e11a5b77c1747c9ebb9 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Revista do Instituto de Medicina Tropical de São Paulo, Vol 44, Iss 5, Pp 289-292 (2002) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652002000500011&tlng=en https://doaj.org/toc/1678-9946 1678-9946 https://doaj.org/article/664bb7694a4f4e11a5b77c1747c9ebb9 |
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1809895911603568640 |