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  • Title: Nested PCR assay for detection of Theileria annulata in Hyalomma anatolicum infesting cattle from coastal Odisha, India.
    Author: Dehuri M, Panda M, Sahoo N, Mohanty B, Behera B.
    Journal: Anim Biotechnol; 2022 Nov; 33(6):1229-1234. PubMed ID: 33688785.
    Abstract:
    Ticks are economically important obligatory blood feeding arthropods that have a pivotal role in transmission of infection. The present study was conducted in ixodid ticks collected from four districts of coastal Odisha, India to investigate the prevalence of Theileria annulata. Adult semi engorged Hyalomma anatolicum ticks (n = 178) were dissected, the salivary gland was isolated and DNA was extracted. A nested PCR targeting the Tams1 gene of T. annulata, utilizing two sets of primers (N516F, N517R, and Ta14136iF, Ta249R) was utilized for detection of the parasite. The PCR products were then sequenced and subjected to BLAST analysis, alignment, and phylogenetic study. Two sequences deposited in GenBank were assigned Accession No MH477290.1 and Accession No MH477291.1. The molecular investigation of T. annulata revealed an overall prevalence of 14.6% in tick vectors, and nested PCR was found to have significant (p < 0.05) higher results than primary PCR. A significant higher presence (p < 0.05) was recorded in female ticks compared with male ticks. This is the first report of detection of the parasite in tick vectors in the state of Odisha.
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