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A new ovine Babesia species transmitted by Hyalomma...

Summary citation from AGRICOLA, the online catalog of the National Agricultural Library (NAL)
 

A new ovine Babesia species transmitted by Hyalomma anatolicum anatolicum

The pathogenicity and morphology of a large Babesia species, Babesia sp. Xinjiang, are described here. The parasite has very low virulence for sheep, and caused no detectable clinical symptoms. Splenectomized sheep infected with the parasite showed mild fever and low parasitemia and would recover gradually. If splenectomized sheep were immuno-suppressed with dexamethasone, the parasitemia could reach 8.5%, and death occurred. A splenectomized calf could not be infected with the Babesia species. Paired parasites were the typical form of the Babesia species in erythrocytes and the average size of a pair of parasites was 2.42 (±0.35) μm x 1.06 (±0.22) μm. Merozoites were found in the gut, salivary gland, haemolymph, ovary and eggs of female Hyalomma anatolicum anatolicum engorged on sheep infected with the parasites. The results of experimental transmission showed that the larval, nymph and adult stages of H. a. anatolicum could transmit the Babesia species to sheep.

Journal Title: Experimental parasitology.
Journal Volume/Issue: 2009 Aug., v. 122, issue 4
Main Author: Guan, Guiquan
Other Authors: Ma, Miling, Moreau, Emmanuelle, Liu, Junlong, Lu, Bingyi, Luo, Jianxun, Jorgensen, Wayne, Chauvin, Alain, Yin, Hong
Format: Electronic
Language: English
Subjects: Babesia
new species
sheep
babesiosis
disease transmission
virulence
disease vectors
ticks
Hyalomma anatolicum anatolicum
developmental stages
anatomy and morphology
ribosomal DNA
sequence analysis
phylogeny
Internet resource
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