Multiresistance to acaricides in tick populations, a potential problem for livestock in Ecuador?
(2022) 15th International Congress of Parasitology. ICOPANHAGEN — Location: Copenhagen, Denmark (21.August.2024)
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- Authors
Pérez Otáñez, Ximena 
- et. al.
- Abstract
- Ticks of the genus Rhipicephalus microplus are obligate hematophagous ectoparasites of tropical and subtropical areas of the world. Ticks are a serious problem that is difficult to control due to the growing problem of resistance to acaricides, the main method of control. In Ecuador, R. microplus ticks cause serious economic losses to farmers due to the multiple health problems associated with them. In recent years, studies on acaricide resistance have been carried out in depth, believing it to be the main problem; however, the recurrence of multiresistance has been observed. The objective of this project was to diagnose the tick populations of cattle farms to amitraz (AM), ivermectin (IV) and alphacypermethrin (AC) and to emphasize the multiresistance to two or three acaricides by means of larval package. A total of 96 farms in nine provinces of continental Ecuador were sampled, of which 12.5% (12/96) and 18.76% (18/96) of susceptible and mono-resistant farms; while 68.75% (66/96) present multiresistances: 8.33%(8/96) are resistant to AM and IV; 4.17%(4/96) to AM and AC; 7.29%(7/96) to IV and AC; and 48.96%(47/96) to AM, IV and AC. Multiresistance to acaricides complicates tick control, increases management costs due to inadequate and unsuccessful use of acaricides and the pharmaceutical sector encourages this problem by promoting combinations of 2 or more products without technical criteria, which could become a problem of human, environmental and public health.
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Pérez Otáñez, X., & et al. (2022). Multiresistance to acaricides in tick populations, a potential problem for livestock in Ecuador? 15th International Congress of Parasitology. ICOPANHAGEN, Copenhagen, Denmark. https://hdl.handle.net/2078.5/260674