Short Report: Identification of Virulence-Associated Plasmids in Rhodococcus equi in Humans with and without Acquired Immunodeficiency Syndrome in Brazil
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2011-09-01
Autores
Ribeiro, Márcio Garcia [UNESP]
Takai, Shinji
de Vargas, Agueda Castagna
Mattos-Guaraldi, Ana Luiza
Ferreira Camello, Thereza Cristina
Ohno, Ryoko
Okano, Hajime
da Silva, Aristeu Vieira
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Amer Soc Trop Med & Hygiene
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Virulence of Rhodococcus equi strains from 20 humans in Brazil was investigated by using a polymerase chain reaction to characterize isolates as virulent (VapA), intermediately virulent (VapB), and avirulent. Nine isolates were obtained from human immunodeficiency virus (HIV)-positive patients, six from HIV-negative patients, and five from patients of unknown status. Five isolates were VapB positive, four were VapA positive, and eleven were avirulent. Among the nine isolates from HIV-positive patients, five contained VapB plasmids and two contained VapA plasmids. Five VapB-positive isolates had the type 8 virulence plasmid. Eleven of the patients had a history of contact with livestock and/or a farm environment, and none had contact with pigs.
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American Journal of Tropical Medicine and Hygiene. Mclean: Amer Soc Trop Med & Hygiene, v. 85, n. 3, p. 510-513, 2011.