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Bartonella Strains in Small Mammals from Dhaka, Bangladesh, Related to Bartonella in America and Europe

Ecological and bacteriologic observations of small mammals captured in Dhaka, Bangladesh, indicated that Bartonella infections occurred in high prevalence among lesser bandicoot rats (Bandicota bengalensis), black rats (Rattus rattus), and house shrews (Suncus murinus). Sequence analysis of the citrate synthase gene of Bartonella isolates showed that small mammals in Bangladesh harbored a diverse assemblage of strains. Some cultures were genetically related to Bartonella elizabethae, a species identified from a human patient in the United States. Sequences of some other cultures from Bandicota and Rattus rats were identical to sequences of cultures from domestic rats in France, Portugal, and the United States. The finding of Bartonella species in a high proportion of the mammalian samples from Dhaka suggests the need to study whether these agents might be responsible for human cases of febrile illness of unknown etiology in Bangladesh and elsewhere in south Asia.

Received March 13, 2007. Accepted for publication May 14, 2007.

Acknowledgments: The authors thank all people from Safeway Pest Control, Dhaka, Bangladesh, who trapped and processed the animals. Authors’ addresses: Ying Bai, Kelly W. Sheff, and Michael Y. Kosoy, Centers for Disease Control and Prevention, Division of Vector Borne Infectious Diseases, Fort Collins, CO 80522. Susan P. Montgomery, Centers for Disease Control and Prevention, Division of Vector Borne Infectious Diseases, Fort Collins, CO 80522. Current address: Centers for Disease Control and Prevention, Division of Parasitic Diseases, Chamblee, GA. Manjur A. Chowdhury, Safeway Pest Control, Dhaka, Bangladesh. Robert F. Breiman, ICDDR, B: Centre for Health and Population Research, Dhaka, Bangladesh. Current address: International Emerging Infections Program, CDC-KEMRI, Nairobi, Kenya. Hidenori Kabeya, Nihon University, College of Bioresource Sciences, Fujisawa, Japan.

^* Address correspondence to Michael Y. Kosoy, CDC, Rampart Road, Fort Collins, CO 80521. E-mail: mck3{at}cdc.gov or mkosoy{at}cdc.gov

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