RESEARCH ARTICLES
Deltamethrin resistance in Rhipicephalus sanguineus and Rhipicephalus (Boophilus) microplus tick population in Kerala
Amrutha Anand, Bindu Lakshmanan, T.A. Kajal, Siju Joseph, T.V. Aravindakshan and Jain Jose
doi: https://doi.org/10.51966/jvas.
Journal of Veterinary and Animal Sciences.2021. 52(1):19-25.
Author Details
Amrutha Anand: MSc Scholar, School of Applied Animal Production and Biotechnology, College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
Bindu Lakshmanan: Associate Professor, Department of Veterinary Parasitology,College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
T.A. Kajal: MVSc Scholar, Department of Veterinary Parasitology,College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
Siju Joseph: Assistant Professor, Department of Veterinary Microbiology,College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
T. V. Aravindakshan: Director, Centre for Advanced studies in Animal Genetics and Breeding, College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
Jain Jose: Research Assistant, Department of Animal Genetics and Breeding, CVAS, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
Article History
Received: 22.05.2020, Accepted: 10.10.2020, Published online: 01.01.2021
Corrersponding author: Amrutha Anand
e-mail: amruthaanand1010@gmail.com
Citation: Anand, A., Lakshmanan, B., Tambe, K.A., Joseph, S., Aravindakshan, T.V. and Jose, J. 2021.Deltamethrin resistance in Rhipicephalus sanguineus and Rhipicephalus (Boophilus) microplustick population in Kerala. J. Vet. Anim. Sci.52(1): 19-25.
Abstract
The study evaluated deltamethrin resistance in Rhipicephalus sanguineus and Rhipicephalus (Boophilus) microplus tick populations of Kerala in India, using larval packet test (LPT). Dose response data were analysed by the probit method, the LC50 and LC95 of deltamethrin against ticks were determined by applying regression equation analysis to the probit-transformed data of mortality. In R. sanguineus, 50 per cent of isolates were found resistant at discriminating dose (600 ppm) by larval packet test. The p value obtained upon regression analysis was < 0.05 and was considered as significant. A majority of R. (B.) microplus were found to be susceptible to deltamethrin. However, these susceptible isolates survived doses which were twice the recommended doses (1.25 ppm – 100 ppm). The p value of isolates except isolate 1 and 5 were < 0.05 and statistically significant. The results highlight acaricide resistance to be one of the reasons for the alarming prevalence of tick-borne haemoparasites in Kerala and demand urgent interventions to ameliorate the resistance by alternate control strategies.
Keywords: Rhipicephalus sanguineus, Rhipicephalus (Boophilus) microplus, Larval Packet test
