Background on the control of the cattle tick R. (B.) microplus and the use of coumarin substances as an alternative

Molano, Carlos Eduardo Rodríguez; Torres, Sergio Ulloa; Monrroy, Laura-Estefanía Niño

doi:10.15406/ppij.2020.08.00299

Cited by 3 publications

(2 citation statements)

References 166 publications

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“…The animals raised at latitude -11 ° showed greatest infestation, followed by latitude -18 °, suggesting that the closer the line to the equator, the greater the infestation. RoDRÍGUEZ-Molano et al (2020) related is widely distributed in tropical and subtropical regions between 32 °N and 35 °S latitude, covering central and South america, Africa and Oceania.…”

Section: Resultsmentioning

confidence: 99%

Genetic and environmental factors that affect tick infestation in Nelore x Angus crossbreed cattle

et al. 2021

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This study evaluated the effects of seasons and latitude on tick counting and determined the best model to estimate genetic parameters for tick count and hair coat. Records of animals naturally exposed to ticks on farms in several Brazilian states and in Paraguay were used. The ANOVA was used to verify the effects of seasons and latitude on the tick count trait. Spring was the season with the highest average, followed by summer and autumn, which showed no differences between them. The winter presented the lowest average values. Latitude -11° had the highest mean value followed by latitude -18°. The Bayesian approach was used to evaluate tick count and hair coat and to identify a suitable model for estimating genetic parameters for use in genetic evaluations. The data were analyzed using an animal model with four different specifications for “fixed” purposes. The inference was based on a Markov chain Monte Carlo (MCMC). The criteria for selection of the Bayesian model indicated that the M1 model, which considered the breed composition in the contemporary group, was superior to the other models, both for tick count and hair coat. Heritability estimates for tick count and hair coat obtained using the M1 model were 0.14 and 0.22, respectively. The rank correlations between the models for tick count and hair coat were estimated and reordering was verified for tick count. The estimated genetic correlation between tick count and hair coat traits was negative (-0.12). These findings suggest that different genes regulate tick count and hair coat.

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Section: Resultsmentioning

confidence: 99%

Genetic and environmental factors that affect tick infestation in Nelore x Angus crossbreed cattle

et al. 2021

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“…Plant extracts or secondary metabolites, including flavonoids, terpenes, spilanthol and coumarins, have been studied comprehensively for their potential to control ticks [156]. The primary reason for the development of plant extracts for tick control is the global inclination to reduce chemical acaricides for fear of developing resistance and the presence of chemical residues that pose a danger to human and animal health [156]. SEA is home to the diverse biodiversity of tropical plants that have been shown to possess medicinal properties [157].…”

Section: Controlling and Acaricides Resistancementioning

confidence: 99%

Rhipicephalus Tick: A Contextual Review for Southeast Asia

et al. 2021

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Rhipicephalus species are distributed globally with a notifiable presence in Southeast Asia (SEA) within animal and human populations. The Rhipicephalus species are highly adaptive and have established successful coexistence within human dwellings and are known to be active all year round, predominantly in tropical and subtropical climates existing in SEA. In this review, the morphological characteristics, epidemiology, and epizootiology of Rhipicephalus tick species found in SEA are reviewed. There are six commonly reported Rhipicephalus ticks in the SEA region. Their interactions with their host species that range from cattle, sheep, and goats, through cats and dogs, to rodents and man are discussed in this article. Rhipicephalus-borne pathogens, including Anaplasma species, Ehrlichia species, Babesia species, and Theileria species, have been highlighted as are relevant to the region in review. Pathogens transmitted from Rhipicepahalus ticks to host animals are usually presented clinically with signs of anemia, jaundice, and other signs of hemolytic changes. Rhipicephalus ticks infestation also account for ectoparasitic nuisance in man and animals. These issues are discussed with specific interest to the SEA countries highlighting peculiarities of the region in the epidemiology of Rhipicephalus species and attendant pathogens therein. This paper also discusses the current general control strategies for ticks in SEA proffering measures required for increased documentation. The potential risks associated with rampant and improper acaricide use are highlighted. Furthermore, such practices lead to acaricide resistance among Rhipicephalus species are highlighted.

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Status of Acaricide Resistance and Detecting the Knockdown Resistance Mutation T2134A in the Cattle Tick Rhipicephalus microplus (Acari: Ixodidae) from Northeastern Mexico

Juache-Villagrana,

Ponce-Garcia,

Gonzalez-Escandon

et al. 2023

Journal of the American Mosquito Control Association

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Rhipicephalus microplus is the most important tick in veterinary medicine, given its repercussions on animal production. The principal strategy to avoid adverse effects associated with R. microplus is the chemical control of tick populations through organosynthetic acaricides. Therefore, monitoring susceptibility to acaricides is paramount in any control program. This study aimed to analyze the resistance status of 2 populations of R. microplus from northeastern Mexico to the organochlorine (OC) lindane, organophosphates (OP) coumaphos, chlorfenvinphos, diazinon, and chlorpyrifos, and the synthetic pyrethroids (SPs) flumethrin, deltamethrin, and cypermethrin. Discriminating doses (DD) of each acaricide were used in the larval packet bioassay (LPT). Additionally, the presence of the knockdown resistance (kdr) mutation T2134A associated with pyrethroid resistance was evaluated using allele-specific polymerase chain reaction (PCR). The populations of R. microplus showed a high frequency of resistance to SP, with mortality rates of less than 5%; they also showed resistance to the OPs (diazinon and chlorpyrifos) with mortality rates ranging from 1.29% to 34.62%; meanwhile, they were susceptible to coumaphos and chlorfenvinphos. Mortality rates higher than 66% were observed for lindane, indicating susceptibility. The mutant allele of the kdr mutation T2134A was detected in 75% and 100% of the pools analyzed. The populations studied presented a highly resistant profile to pyrethroids, with the presence of the kdr mutant allele A2134. The susceptibility to the organophosphates such as coumaphos and chlorfenvinphos of R. microplus from northeastern Mexico should be noted.

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Background on the control of the cattle tick R. (B.) microplus and the use of coumarin substances as an alternative

Abstract: Background on the control of the cattle tick R. (B.) microplus and the use of coumarin substances as an alternative Volume 8 Issue 4 -2020

Cited by 3 publications

References 166 publications

Genetic and environmental factors that affect tick infestation in Nelore x Angus crossbreed cattle

Genetic and environmental factors that affect tick infestation in Nelore x Angus crossbreed cattle

Rhipicephalus Tick: A Contextual Review for Southeast Asia

Status of Acaricide Resistance and Detecting the Knockdown Resistance Mutation T2134A in the Cattle Tick Rhipicephalus microplus (Acari: Ixodidae) from Northeastern Mexico

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