Journal
CURRENT CLINICAL MICROBIOLOGY REPORTS
Volume 2, Issue 4, Pages 173-181Publisher
SPRINGER
DOI: 10.1007/s40588-015-0025-z
Keywords
Babesia; Malaria; B. microti; B. divergens; Zoonosis; Transfusion-transmitted babesiosis
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Funding
- NHLBI NIH HHS [R01 HL105694, R21 HL129215] Funding Source: Medline
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Human babesiosis is a zoonotic disease caused by protozoan parasites of the Babesia genus, primarily in the Northeastern and Midwest USA due to Babesia microti and Western Europe due to Babesia divergens. Parasites are transmitted by the bite of the ixodid tick when the vector takes a blood meal from the vertebrate host, and the economic importance of bovine babesiosis is well understood. The pathology of human disease is a direct result of the parasite's ability to invade host's red blood cells. The current understanding of human babesiosis epidemiology is that many infections remain asymptomatic, especially in younger or immune competent individuals, and the burden of severe pathology resides within older or immunocompromised individuals. However, transfusion-transmitted babesiosis is an emerging threat to public health as asymptomatic carriers donate blood, and there are as yet no licensed or regulated tests to screen blood products for this pathogen. Reports of tick-borne cases within new geographical regions such as the Pacific Northwest of the USA, through Eastern Europe, and into China are also on the rise. Further, new Babesia spp. have been identified globally as agents of severe human babesiosis, suggesting that the epidemiology of this disease is rapidly changing, and it is clear that human babesiosis is a serious public health concern that requires close monitoring and effective intervention measure.
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