Resistencia de la garrapata Boophilus microplus a los ixodicidas

Alonso-Díaz, Miguel Ángel; Rodríguez-Vivas, RI; Fragoso-Sanchez, H.; Rosario-Cruz, Rodrigo

doi:10.4067/s0301-732x2006000200003

Cited by 48 publications

(26 citation statements)

References 38 publications

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“…(B.) microplus is found (Soberanes-Céspedes et al, 2002;Miller et al, 2005;Alonso-Díaz et al, 2006;Ntondini et al, 2008;Guerrero et al, 2012;Reck et al, 2014;Van Wyk et al, 2016;Vudriko et al, 2016). Ticks of the sub-genus Rhipicephalus (Boophilus) are most frequently associated with selection for resistance to acaricides, particularly R.…”

Section: Acaricide Resistance In Rhipicephalus (Boophilus) Microplus mentioning

confidence: 99%

Driving forces for changes in geographic range of cattle ticks (Acari: Ixodidae) in Africa: A review

Nyangiwe

Yawa²,

Muchenje³

2018

SA J. An. Sci.

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Ticks are the most important external parasites of cattle and are known to transmit more pathogens than any other group of arthropods worldwide. About 80% of the world cattle population is at risk of ticks and tick-borne diseases, causing a global annual loss of $US22-30 billion. In Africa, the impact of ticks is ranked high, and they transmit diseases such as cowdriosis, anaplasmosis, bovine babesiosis and theileriosis. A range expansion of ixodid ticks has been observed in Africa, in particular for the genera Amblyomma and Rhipicephalus, which contribute greatly to cattle loss owing to morbidity and mortality. Distributional changes in ticks can lead to the emergence or re-emergence of infectious and parasitic diseases. Climate change is frequently invoked as the primary cause of tick distribution, but it is not the only factor. Human lifestyle changes, including transportation of livestock within countries, have promoted the introduction of new tick species and the diseases they transmit. One such example is the spread of the Asian cattle tick Rhipicephalus (Boophilus) microplus to West Africa. Rhipicephalus (Boophilus) microplus was recorded for the first time in Namibia and was probably introduced into Namibia from South Africa. Likewise, Amblyomma variegatum, the vector of heartwater disease, has the largest distribution in Africa. Its spread is outside its native range and it is considered the second most invasive tick species after R. (B.) microplus on the continent. Rhipicephalus (Boophilus) microplus is a one-host tick that is reported to be resistant to conventional acaricides and this contributes largely to its spread into non-endemic areas.

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Section: Acaricide Resistance In Rhipicephalus (Boophilus) Microplus mentioning

confidence: 99%

Driving forces for changes in geographic range of cattle ticks (Acari: Ixodidae) in Africa: A review

Nyangiwe

Yawa²,

Muchenje³

2018

SA J. An. Sci.

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“…Acaricide resistance is caused by several intrinsic and operational factors [7,8]. Intrinsic factors are related to the biology, ecology, genetics, and the mutation rate of ticks, while operational factors are management-related [8,9].…”

Section: Introductionmentioning

confidence: 99%

The current status of resistance to alpha-cypermethrin, ivermectin, and amitraz of the cattle tick (Rhipicephalus microplus) in Ecuador

et al. 2017

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Rhipicephalus microplus is widely distributed in tropical and subtropical areas of the world where livestock is a principal activity with great veterinary and economic importance. In Ecuador, this hematophagous ectoparasite has been observed between 0 and 2600 masl. One of the main tick control measures is the use of acaricides, which have been indiscriminately used worldwide and in Ecuador. In this country, no studies on acaricide resistance in Rhipicephalus microplus have been published. The current study aims to characterise the level of resistance of R. microplus against three main acaricides commonly used in Ecuador i.e. amitraz, alpha-cypermethrin and ivermectin to determine the level and pattern of dose-responses for R. microplus in 12 field populations (farms). The level of acaricide resistance was evaluated using three different bioassays: adult immersion test (AIT), larval package test (LPT) and larval immersion test (LIT), as recommended by the FAO. The predictive dose-responses were analysed by binomial logistics regression of the larval survival rate (resistance). In general, we found resistance of 67% for amitraz; 50% for alpha-cypermethrin and from 25 to 42% for ivermectin in the twelve field populations analysed. Resistance levels were studied in larval and adult bioassays, respectively, which were slightly modified for this study. For larval bioassays based on corrected mortality i.e. high (above 51%), medium (21–50%) and low (11–20%) resistance, percentages less than 10% were considered as susceptible. For the adult test, two resistance levels were used i.e. high (more than 76%) and medium (51 to 75%) resistance. Percentages lower than 50% were considered as susceptible. In this context, for larval bioassays, amitraz showed 21%, 38% and 8% for high, medium and low resistance, respectively. Alpha-cypermethrin presented 8%, 4 and 38% for high, medium and low resistance, respectively. Ivermectin presented 8%, 25% and 8% for high, medium and low resistance, respectively. For adult tests with amitraz 50% and 17% of the field populations showed average and high resistance, with evidences of average resistance to alpha-cypermethrin in 50% of the samples and average resistance against ivermectin in 25% of the farms. No statistical difference amongst the three bioassays was found and acaricide resistance was confirmed by logistic regression analysis; hence resistance (dose-responses) in each field populations differed, depending on the choice of the acaricide, frequent usage, frequency of treatment and farm management. The effective estimated dose needed to eliminate 99% of ticks is higher than dose recommended by the manufacturer. In conclusion, amitraz showed the highest resistance followed by ivermectin and alpha-cypermethrin and reveals differences on resistance in each individual field population. This information is important in order to establish the monitoring of resistance on each farm individually, contributing to the rational use of acaricides included in an integrated control program for R. m...

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“…El desarrollo de poblaciones de garrapatas resistentes a los acaricidas se da como resulta do de la eliminación constante de individuos genéticamente susceptibles a cualquiera de estas sustancias, fomentando la supervivencia de los individuos insensibles (resistentes) (ALONSO-DÍAZ et al, 2006). Los mecanismos que confieren la resistencia varían entre individuos, y los mejor descritos, hasta el momento, incluyen la insensibilidad en el sitio de acción, la resistencia metabólica y la disminución en la permeabilidad de la cutícula de la garrapata (ALONSO-DÍAZ et al, 2006;GUERRERO et al, 2012).…”

Section: Introductionunclassified

“…Los mecanismos que confieren la resistencia varían entre individuos, y los mejor descritos, hasta el momento, incluyen la insensibilidad en el sitio de acción, la resistencia metabólica y la disminución en la permeabilidad de la cutícula de la garrapata (ALONSO-DÍAZ et al, 2006;GUERRERO et al, 2012).…”

Section: Introductionunclassified

Resistencia in vitro de la garrapata equina (Dermacentor nitens) en el departamento de Córdoba, Colombia

et al. 2017

Rev Colombiana Cienc Anim. RECIA

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Determinar la resistencia de la garrapata Dermacentor nitens a metrifonato (Neguvon®, Bayer©, Alemania), cipermetrina (Ganabaño®, Novartis©, USA), y amitraz (Triatox®, Schering Plough©, USA). Un estudio experimental no probabilístico por conveniencia, de cinco predios, donde se recolectaron 120 teleogínas ingurgitadas de D. nitens, las teleogínas fueron sometidas a inmersión según prueba de Drummond. Se encontró que el tratamiento que menos quimioresistencia produjo fue amitraz con 97% de efectividad, seguido por cipermetrina con 93% y metrifonato con 53% respectivamente. A la evaluación de la oviposición, se encontró que amitraz es el de mayor efectividad 23%, luego cipermetrina 18% y metrifonato con 1%. La evaluación porcentual de eclosión fue mayor para el metrifonato con 18,97%, cipermetrina con 4,70% y amitraz con 1,68% respectivamente. Se concluye que amitraz es el acaricida más efectivo in vitro no solo para eliminar adultos sino afectar el ciclo de D. nitens, pero su uso en la práctica in vivo es improbable por los efectos tóxicos en équidos. Entre los productos utilizables en los equinos, la cipermetrina es el fármaco de elección.

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Resistencia de la garrapata Boophilus microplus a los ixodicidas

Cited by 48 publications

References 38 publications

Driving forces for changes in geographic range of cattle ticks (Acari: Ixodidae) in Africa: A review

Driving forces for changes in geographic range of cattle ticks (Acari: Ixodidae) in Africa: A review

The current status of resistance to alpha-cypermethrin, ivermectin, and amitraz of the cattle tick (Rhipicephalus microplus) in Ecuador

Resistencia in vitro de la garrapata equina (Dermacentor nitens) en el departamento de Córdoba, Colombia

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