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Journal of Clinical Microbiology, May 2005, p. 2104-2110, Vol. 43, No. 5
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.5.2104-2110.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Genotypic Study of Pneumocystis jirovecii in Human Immunodeficiency Virus-Positive Patients in Thailand

Suradej Siripattanapipong,1 Jeerapun Worapong,2 Mathirut Mungthin,3 Saovanee Leelayoova,3 and Peerapan Tan-ariya1*

Department of Microbiology, Faculty of Science, Mahidol UniversityRama VI Rd.,1 Department of Parasitology, Phramongkutklao College of Medicine, Ratchawithi Rd., Bangkok 10400,3 Center for Biotechnology and Department of Biotechnology, Institute of Science and Technology for Research and Development, Mahidol University, Salaya, Nakornpratom 73170, Thailand2

Received 18 October 2004/ Returned for modification 3 November 2004/ Accepted 17 January 2005

Pneumocystis jirovecii is one of the common opportunistic infections in human immunodeficiency virus (HIV)-infected patients in Thailand. Information regarding genotypic and epidemiological of this organism in Thai patients is not available. We analyzed the genotypes of 28 P. jirovecii-positive specimens from bronchoalveolar lavage and sputum samples from HIV-infected Thai patients based on nucleotide variations of the internal transcribed spacer regions 1 and 2 of the rRNA gene. Thirteen genotypes were the same as previously reported outside Thailand. Ten genotypes, which included Bp, Er, Eq, Ic, Ir, Ip, Rc, Rp, Qb, and Qq, were new. Ir and Rp were unique and dominant types observed in HIV-infected Thai patients. Thirteen specimens (46.4%) were infected with a single type of P. jirovecii, and fifteen (53.6%) were mixed infections. These differences may be used as genotypic markers for studying the epidemiology and transmission of P. jirovecii in the Thai population.

* Corresponding author. Mailing address: Department of Microbiology, Faculty of Science, Mahidol University, Rama VI Rd., Phayathai, Bangkok 10400, Thailand. Phone: (662) 2015524. Fax: (662) 6445411. E-mail: scptn{at}mahidol.ac.th.

Journal of Clinical Microbiology, May 2005, p. 2104-2110, Vol. 43, No. 5
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.5.2104-2110.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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