Variation among Bm86 sequences in Rhipicephalus (Boophilus) microplus ticks collected from cattle across Thailand

Experimental & Applied Acarology
S KaewmongkolSathaporn Jittapalapong

Abstract

Anti-tick vaccines based on recombinant homologues Bm86 and Bm95 have become a more cost-effective and sustainable alternative to chemical pesticides commonly used to control the cattle tick, Rhipicephalus (Boophilus) microplus. However, Bm86 polymorphism among geographically separate ticks is reportedly associated with reduced effectiveness of these vaccines. The purpose of this study was to investigate the variation of Bm86 among cattle ticks collected from Northern, Northeastern, Central and Southern areas across Thailand. Bm86 cDNA and deduced amino acid sequences representing 29 female tick midgut samples were 95.6-97.0 and 91.5-93.5 % identical to the nucleotide and amino acid reference sequences, respectively, of the Australian Yeerongpilly vaccine strain. Multiple sequence analyses of these Bm86 variants indicated geographical relationships and polymorphism among Thai cattle ticks. Two larger groups of cattle tick strains were discernable based on this phylogenetic analysis of Bm86, a Thai group and a Latin American group. Thai female and male cattle ticks (50 pairs) were also subjected to detailed morphological characterization to confirm their identity. The majority of female ticks had morphological features consisten...Continue Reading

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Citations

May 21, 2016·Parasite Immunology·J de la FuenteC Maritz-Olivier
Aug 23, 2018·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Isabella Maiumi Zaidan BlechaRenato Andreotti
Jun 24, 2020·Parasitology Research·Sarah Melissa Lugo-Caro Del CastilloRodolfo Lagunes-Quintanilla
Mar 4, 2021·Vaccines·Balasamudram Chandrasekhar ParthasarathiSrikant Ghosh
Sep 19, 2017·Journal of Proteome Research·Saúl G Martínez-ArzateHumbert González-Díaz

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