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Sri Venkateswara Veterinary University, Tirupati (2019)

PREVALENCE AND RISK FACTORS ASSOCIATED WITH BOVINE TICK INFESTATION IN TWO DIFFERENT AGRO-CLIMATIC ZONES IN ANDHRA PRADESH

SUNEETHA, KANDI

Titre : PREVALENCE AND RISK FACTORS ASSOCIATED WITH BOVINE TICK INFESTATION IN TWO DIFFERENT AGRO-CLIMATIC ZONES IN ANDHRA PRADESH

Auteur : SUNEETHA, KANDI

Université de soutenance : Sri Venkateswara Veterinary University, Tirupati

Grade : Master of Veterinary Science 2019

Résumé partiel
The present study was carried out to identify the tick species and risk factors associated with tick prevalence in bovines in Andhra Pradesh, India. A total of 3720 animals, including 1942 cattle and 1778 buffaloes in 344 livestock farms covering tropical wet and dry zone (North coastal zone) and tropical semi-arid zone (scarce rainfall zone of Rayalaseema) were examined for the presence of ticks. Overall, 10,371 ticks representing three genera were collected. Analysis on morphology and DNA sequence of 16S ribosomal RNA and cytochrome C oxidase subunit I (COI) four species : Haemaphysalis bispinosa (n = 5704), Rhipicephalus microplus (n = 2533), Hyalomma anatolicum (n = 1272) and H. isaaci (n = 862) were identified with single infestations being the rule. Results revealed that the molecular and morphological data were consistent in the identification of four tick species. The constructed COI phylogenetic tree further identified R. microplus tick samples as R. microplus clade C. Haemaphysalis bispinosa was the predominant species in two zones and the occurrence of H. anatolicum was restricted to semi-arid zone.

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