Cover The American Journal of Tropical Medicine and Hygiene
The American Journal of Tropical Medicine and Hygiene
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0002-9637
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Identification of virulence-associated antigens and plasmids in Rhodococcus equi from patients with acquired immune deficiency syndrome and prevalence of virulent R. equi in soil collected from domestic animal farms in Chiang Mai, Thailand.

Shinji TakaiDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Prasit TharavichitkulDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Chie SasakiDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Yoko OnishiDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Shigeki YamanoDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Tsutomu KakudaDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Shiro TsubakiDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Chumnan TrinarongDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Suvichai RojanasthienDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Anucha SirimalaisuwanDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Ted TesaprateepDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Niwat ManeekarnDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Thira SirisanthanaDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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Teruo KirikaeDepartment of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. takai@vmas.kitasato-u.ac.jp

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DOI:
https://doi.org/10.4269/ajtmh.2002.66.52
Volume/Issue:
Volume 66: Issue 1
Page(s):
52–55
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The prevalence of virulent Rhodococcus equi in soil collected from 17 domestic animal farms (from 12 cattle, 1 pig, and 4 horse farms) and in 6 clinical specimens from patients with acquired immune deficiency syndrome (AIDS) in Chiang Mai, Thailand, was investigated. The isolates were tested for the presence of 15-17-kDa antigens (VapA) and a 20-kDa antigen (VapB) by immunoblotting and for the presence of virulence plasmid DNA. Rhodococcus equi was isolated from most soil samples (68 of 80) obtained from the 17 farms, with 2.0 x 10(2) to 6.0 x 10(5) colony-forming units per gram of soil. We detected VapA in none of the 537 isolates from the soil samples. In one isolate from a pig farm, both VapB and virulence plasmid DNA were detected. Of the 6 clinical isolates from patients with AIDS, however, 4 isolates contained both VapB and virulence plasmid DNA. The remaining 2 isolates were avirulent.

Published Online:
Jan 2002
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