Efficacy of fluralaner (Exzolt) for the treatment of natural Allopsoroptoides galli infestations in laying hens

Soares, Nilce Maria; Tucci, Edna Clara; Perdoncini, Gustavo; Matta, Ricardo Della

doi:10.1016/j.psj.2022.102099

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…Thus, the high plasma concentrations of fluralaner obtained in previous studies with Exzolt® would be expected to kill 100% of the bed bugs for at least the first 14 days post initial treatment. Likewise, in a previous study, treatments of hens with a liquid formulation of fluralaner killed 100% of the poultry red mite for up to the first 15 days post treatment [ 21 ], and resulted in up to 93% reduction of the mite population even 70 days post treatment [ 38 ]. These high mortality and high control rates, coupled with the mites’ LC 50 of approximately 125 ng/ml blood [ 37 , 39 ], again suggest that Exzolt® delivers high plasma concentrations of fluralaner.…”

Section: Discussionmentioning

confidence: 99%

Systemic veterinary drugs for control of the common bed bug, Cimex lectularius, in poultry farms

et al. 2022

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Background The common bed bug, Cimexlectularius L., is a hematophagous ectoparasite that was a common pest in poultry farms through the 1960s. Dichlorodiphenyltrichloroethane (DDT) and organophosphates eradicated most infestations, but concurrent with their global resurgence as human ectoparasites, infestations of bed bugs have been reappearing in poultry farms. Although the impact of bed bugs on chicken health has not been quantified, frequent biting and blood-feeding are expected to cause stress, infections and even anemia in birds. Bed bug control options are limited due to the sensitive nature of the poultry environment, limited products labeled for bed bug control and resistance of bed bug populations to a broad spectrum of active ingredients. Veterinary drugs are commonly used to control endo- and ectoparasites in animals. In this study, we evaluated the effects of two common veterinary drugs on bed bugs by treating the host with systemic antiparasitic drugs. Methods We conducted dose–response studies of ivermectin and fluralaner against several bed bug strains using a membrane feeding system. Also, different doses of these drugs were given to chickens and two delivery methods (topical treatment and ingestion) were used to evaluate the efficacy of ivermectin and fluralaner on bed bug mortality. Results Using an artificial feeding system, both ivermectin and fluralaner caused high mortality in insecticide-susceptible bed bugs, and fluralaner was found to be effective on pyrethroid- and fipronil-resistant bed bugs. Ivermectin was ineffective in chickens either by the topical treatment or ingestion, whereas bed bugs that fed on chickens which had ingested fluralaner suffered high mortality when feeding on these chickens for up to 28 days post treatment. Conclusions These findings suggest that systemic ectoparasitic drugs have great potential for practical use to control bed bug infestations in poultry farms. These findings also demonstrate the efficacy of fluralaner (and potentially other isoxazolines) as a potent new active ingredient for bed bug control. Graphical Abstract

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Section: Discussionmentioning

confidence: 99%