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Prevalence of antibody against influenza A viruses in the Kren-Akorore, an Indian tribe of Central Brazil, first contacted in 1973

Published online by Cambridge University Press:  19 October 2009

J. P. Nascimento ,
M. M. Krawczuk ,
L. F. Marcopito  and
R. G. Baruzzi
J. P. Nascimento
Affiliation:
Centro de Referênda de Influenza, Departamento de Virologia, Instituto Oswaldo Cruz, Rio de Janeiro, Brasil
M. M. Krawczuk
Affiliation:
Centro de Referênda de Influenza, Departamento de Virologia, Instituto Oswaldo Cruz, Rio de Janeiro, Brasil
L. F. Marcopito
Affiliation:
Departamento de Medicina Preventiva, Escola Pawista de Medicina, São Paulo, Brasil
R. G. Baruzzi
Affiliation:
Departamento de Medicina Preventiva, Escola Pawista de Medicina, São Paulo, Brasil
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Influenza A antibodies in serum samples obtained in 1980 from two Indian populations in Central Brazil were compared. The Kren-Akorore, who were first contacted in 1973 and two years later transferred to the Xingu Indian Park (PIX), were compared with Indians from other tribes already living in the PIX before 1975. An analysis was made of the prevalence and distribution of antibodies against the influenza A viruses which have circulated in the civilized world since 1918. Antibodies to the early influenza A viruses were absent in both Indian populations, but A/Hong Kong/1/68 (H3N2) virus apparently circulated in the PIX. No antibody to influenza A/Bangkok/I/79 or to A/Brazil/11/78 (H1N1) was found in any of the sera, whereas antibodies to these viruses were commonly found in urban populations in Brazil. The evidence from influenza antibodies agrees with the information that the Kren-Akorore Indians had been living in complete isolation until 1973, when they were first contacted.

Type
Research Article
Information
Journal of Hygiene , Volume 95 , Issue 1 , August 1985 , pp. 159 - 164
Copyright
Copyright © Cambridge University Press 1985

References

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