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Revista do Instituto de Medicina Tropical de São Paulo

On-line version ISSN 1678-9946

Rev. Inst. Med. trop. S. Paulo vol.38 no.2 São Paulo Mar./Apr. 1996 



Human enterovirus infection in stray dogs. Some aspects of interest to public health


Infecção por enterovirus humanos em cães errantes. Alguns aspectos de interesse em Saúde Pública



Eliseu Alves WaldmanI; Regina C. MoreiraII; Sueli G. SaezII; Denise F.C. SouzaII; Rita de C.C. CarmonaII; Sueko TakimotoII; Valdson de A. CortesIII

IDep. de Epidemiologia da Faculdade de Saúde Pública da Universidade de São Paulo
IIInstituto Adolfo Lutz, São Paulo SP, Brazil
IIICentro de Controle de Zoonoses do Município de São Paulo, SP, Brazil (in memoriam)

Correspondence to




To investigate the possible role of domestic animals as reservoirs of human enteroviruses, we studied 212 stray dogs captured in different areas of the municipality of São Paulo. The captured animals were divided into 19 groups of 10 to 20 dogs each; faeces of 126 of the 212 dogs were processed for enterovirus isolation. The following viruses were isolated from 12 dogs: poliovirus type 1 (2 dogs), poliovirus type 3 (1 dog), echovirus type 7 (8 dogs) and echovirus type 15 (1 dog). Of the 12 infected animals, four had specific homotypic neutralizing antibody titres > 16. All 212 animals were tested for the presence of neutralizing antibodies to human enteroviruses. The frequency of neutralizing antibodies present in titres of > 16 was 10.3%, 3,8% and 4.3% for vaccinal prototypes of polioviruses 1, 2 and 3 respectively; 1,9%, 1.4% and 1.5% for wild prototypes of the same viruses, 11.3% for echovirus 7, and 2.4% for echovirus 15. The proportion of dogs with neutralizing antibodies varied with the virus studied. Some indication of the susceptibility of dogs to infection with human enteroviruses was demonstrated, and the importance of this fact for the Plan for Global Eradication of the Wild Poliovirus is discussed.

Keywords: Enterovirus epidemiology; Poliovirus epidemiology; Enterovirus infection; Human enterovirus infection in animals; Poliovirus eradication.


Foram estudados 212 cães errantes, capturados em áreas periféricas do município de São Paulo, com o objetivo de investigar o possível papel desses animais como reservatórios de enterovírus humanos. Os animais capturados foram divididos em 19 grupos compostos por 10 a 20 animais cada um. Foram efetuadas tentativas de isolamento em amostras de fezes em 126/212 cães, obtendo-se resultados positivos em 12 deles, assim distribuídos: poliovirus tipo 1 (dois cães), poliovírus tipo 3 (um cão), echovirus tipo 7 (oito cães) e echovirus tipo 15 (um cão). Dos 12 animais infectados, quatro apresentaram anticorpos neutralizantes homotípicos com títulos > 16. Todos os 212 cães foram submetidos a pesquisa de anticorpos neutralizantes contra enterovírus humanos. As frequências de anticorpos neutralizantes com títulos > 16 foram de 10,3%, 3,8% e 4,3%, respectivamente, contra protótipos vacinais de poliovírus 1, 2 e 3 e 1,9% 3,8% e 4,3% contra protótipos "selvagens" dos mesmos vírus; de 11,3% contra echovírus tipo 7 e de 2,4% contra echovírus tipo 15. São discutidos dados sugestivos da suscetibilidade de cães à infecção por enterovírus humanos e a possível importância desse fato para o Plano de Erradição do Poliovírus "Selvagem".



Full text available only in PDF format.

Texto completo disponível apenas em PDF.




We are grateful to Mr. Bienvenido Martin, Adolfo Lutz Institute, to the team of the Centre of Zoonoses Control of the Municipality of São Paulo, and its Director Dr. Arnaldo Vila Nova for their invaluable collaboration. We are also grateful to Drs. Juan Angulo and José A. Neves Candeias for opportune critiques and suggestions.



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Correspondence to:
Eliseu Alves Waldman
Av. Dr. Arnaldo 715
01246-904 São Paulo, SP, Brazil

Recebido para publicação em 11/09/1995
Aceito para publicação em 14/03/1996

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