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Year 2017 - Volume 37, Number 5
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Isolation and characterization of Pythium species from swampy areas in the Rio Grande do Sul, Brazil, and evaluation of pathogenicity in an experimental model, 37(5):459-464
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ABSTRACT.- Zambrano C.G., Fonseca A.O.S., Valente J.S.S., Braga C.Q., Sallis E.S.V., Azevedo M.I., Weiblen C., Santurio J.M., Botton S.A. & Pereira D.I.B. 2017. [Isolation and characterization of Pythium species from swampy areas in the Rio Grande do Sul, Brazil, and evaluation of pathogenicity in an experimental model.] Isolamento e caracterização de espécies de Pythium de ambientes aquáticos no Estado do Rio Grande do Sul e avaliação da patogenicidade em modelo experimental. Pesquisa Veterinária Brasileira 37(5):459-464. Laboratório de Micologia, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS 96160-000, Brazil. E-mail: danielabrayer@gmail.com
One hundred and eighty-six water samples from swampy areas were collected in 13 municipalities of South, Central and West regions of Rio Grande do Sul, Brazil, in order to isolate and characterize Pythium species and assess their pathogenicity using rabbits as experimental model. Different Pythium species were isolated from 22 (11.8%) water samples, including P. insidiosum (n=1), P. catenulatum (n=3), P. pachycaule voucher (n=1), P. rhizo-oryzae (n=3), P. torulosum (n=4) e Pythium spp. (n=10). Zoospores of these microorganisms were produced in vitro and inoculated subcutaneously into rabbits, which were assessed over 45 days. Only P. insidiosum showed pathogenicity, causing pythiosis in the experimental model. |
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