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TRANSMISSION OF ENTEROCYTOZOON BIENEUSI GENOTYPE A IN A THAI ORPHANAGE

A cross-sectional study of Enterocytozoon bieneusi infection in children who lived in an orphanage in Bangkok, Thailand was conducted in April 2003. Two hundred ninety stool specimens were collected and examined under light microscopy after staining with gram-chromotrope. Confirmation of E. bieneusi was done using transmission electron microscopy. Of 290 samples, 12 (4.1%) were positive for E. bieneusi. Genotypic characterization of 10 E. bieneusi showed that all were genotype A, which might indicate the same source of infection. Multivariate analysis showed that orphans who were 12–23 months old, girls, and living in one particular house were independently associated with E. bieneusi infection. Our study suggests that E. bieneusi infection in this orphanage might be transmitted person to person.

Received October 11, 2004. Accepted for publication November 25, 2004.

Acknowledgments: We gratefully thank the director and childcare workers of the orphanage for their support of this study.

Financial support: This work was supported by the Phramongkutklao Research Fund and the Thailand-Tropical Diseases Research Program (T-2), ID 02-2-ARI-24-007.

^* Address correspondence to Mathirut Mungthin, Department of Parasitology, Phramongkutklao College of Medicine, 315 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand. E-mail: mathirut{at}pmk.ac.th

Authors’ addresses: Saovanee Leelayoova, Tawee Naaglor, and Mathirut Mungthin, Department of Parasitology, Phramongkutklao College of Medicine, 315 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand, Telephone and Fax: 66-2-354-7761, E-mail: mathirut{at}pmk.ac.th. Ittisak Subrungruang and Porntip Chavalitshewinkoon-Petmitr, Department of Protozoology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400 Thailand. Ram Rangsin, Department of Military and Community Medicine, Phramongkutklao College of Medicine, 315 Ratchawithi Road, Ratchathewi, Bangkok 10400, Thailand. Jeerapan Worapong, Center for Biotechnology and Department of Biotechnology, Institute of Science and Technology for Research and Development, Salaya, Nakornpratom 73170, Thailand.

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