Abstract

The transmissible diseases of cattle caused by the pathogens Theileria and Babesia are highly hazardous to animals and lead to significant economic losses in cattle breeding. In this work, a molecular-genetic method was used to identify these pathogens in the blood of animals of one of the farms in the Moscow Region. The causative agent of babesiosis was not revealed, while the level of distribution of Theileria spp. fluctuated in significant range from 19 to 43%, depending on seasonality. Identity from 97 to 100% to five different species of Theileria spp.was shown for the nucleotide sequences of the fragment of 18S rRNA gene of the obtained Theileria spp. isolates. The obtained data on the level of infestation of cattle by Theileria spp. allow drawing attention to a problem that can play a significant role in the economic losses in the livestock in Russia. &nbsp

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