Molecular Characterization of a Non–Babesia divergensOrganism Causing Zoonotic Babesiosis in Europe
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Open Access
- 1 August 2003
- journal article
- case report
- Published by Centers for Disease Control and Prevention (CDC) in Emerging Infectious Diseases
- Vol. 9 (8) , 942-955
- https://doi.org/10.3201/eid0908.020748
Abstract
In Europe, most reported human cases of babesiosis have been attributed, without strong molecular evidence, to infection with the bovine parasite Babesia divergens. We investigated the first known human cases of babesiosis in Italy and Austria, which occurred in two asplenic men. The complete 18S ribosomal RNA (18S rRNA) gene was amplified from specimens of their whole blood by polymerase chain reaction (PCR). With phylogenetic analysis, we compared the DNA sequences of the PCR products with those for other Babesia spp. The DNA sequences were identical for the organism from the two patients. In phylogenetic analysis, the organism clusters with B. odocoilei, a parasite of white-tailed deer; these two organisms form a sister group with B. divergens. This evidence indicates the patients were not infected with B. divergens but with an organism with previously unreported molecular characteristics for the 18S rRNA gene.Keywords
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