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Population Ecology of Hantavirus Rodent Hosts in Southern Brazil

2014; American Society of Tropical Medicine and Hygiene; Volume: 91; Issue: 2 Linguagem: Inglês

10.4269/ajtmh.13-0465

1476-1645

Bernardo Rodrigues Teixeira, Nathalie Loureiro, Liana Strecht, Rosana Gentile, Renata Carvalho de Oliveira, Alexandro Guterres, Jorlan Fernandes, Luciana Helena Bassan Vicente de Mattos, Sonia M. Raboni, Giselia Rubio, Cibele Rodrigues Bonvicino, Claudia Nunes Duarte dos Santos, Elba Regina Sampaio de Lemos, Paulo Sérgio D’Andrea,

Viral Infections and Outbreaks Research

In this study we analyze population dynamics of hantavirus rodent hosts and prevalence of infection over a 2-year period in Southern Brazil, a region with a high incidence of hantavirus pulmonary syndrome. The 14 small mammal species captured were composed of 10 rodents and four marsupials, the six most abundant species being Akodon serrensis , Oxymycterus judex , Akodon montensis , Akodon paranaensis , Oligoryzomys nigripes , and Thaptomys nigrita . These species displayed a similar pattern with increasing population sizes in fall/winter caused by recruitment and both, increase in reproductive activity and higher hantavirus prevalence in spring/summer. Specific associations between A. montensis /Jaborá Virus (JABV) and O. nigripes /Juquitiba-like Virus (JUQV-like) and spillover infections between A. paranaensis /JABV, A. serrensis /JABV, and A. paranaensis /JUQV-like were observed. Spillover infection in secondary hosts seems to play an important role in maintaining JABV and JUQV-like in the hantavirus sylvatic cycle mainly during periods of low prevalence in primary hosts.