Rachel Busselman


Curriculum vitae



Ecology and Evolutionary Biology

Texas A&M University

Ecology and Evolutionary Biology
School of Veterinary Medicine
Department of Veterinary Integrative Biosciences



Canine Systemic Insecticides Fluralaner and Lotilaner Induce Acute Mortality of Triatoma gerstaeckeri, North American Vector of the Chagas Disease Parasite


Journal article


Rachel E. Busselman, Italo B Zecca, G. Hamer, S. Hamer
American Journal of Tropical Medicine and Hygiene, 2023

Semantic Scholar DOI PubMedCentral PubMed
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Cite

APA   Click to copy
Busselman, R. E., Zecca, I. B., Hamer, G., & Hamer, S. (2023). Canine Systemic Insecticides Fluralaner and Lotilaner Induce Acute Mortality of Triatoma gerstaeckeri, North American Vector of the Chagas Disease Parasite. American Journal of Tropical Medicine and Hygiene.


Chicago/Turabian   Click to copy
Busselman, Rachel E., Italo B Zecca, G. Hamer, and S. Hamer. “Canine Systemic Insecticides Fluralaner and Lotilaner Induce Acute Mortality of Triatoma Gerstaeckeri, North American Vector of the Chagas Disease Parasite.” American Journal of Tropical Medicine and Hygiene (2023).


MLA   Click to copy
Busselman, Rachel E., et al. “Canine Systemic Insecticides Fluralaner and Lotilaner Induce Acute Mortality of Triatoma Gerstaeckeri, North American Vector of the Chagas Disease Parasite.” American Journal of Tropical Medicine and Hygiene, 2023.


BibTeX   Click to copy

@article{rachel2023a,
  title = {Canine Systemic Insecticides Fluralaner and Lotilaner Induce Acute Mortality of Triatoma gerstaeckeri, North American Vector of the Chagas Disease Parasite},
  year = {2023},
  journal = {American Journal of Tropical Medicine and Hygiene},
  author = {Busselman, Rachel E. and Zecca, Italo B and Hamer, G. and Hamer, S.}
}

Abstract

ABSTRACT. Chagas disease is a health concern for humans and animals across the Americas, and control options targeting the triatomine vectors of Trypanosoma cruzi, the causative agent of Chagas disease, are limited. Host-targeted interventions may be a useful and underused tool in controlling the spread of T. cruzi from vectors to hosts. Domestic dogs are known to be key bloodmeal hosts for triatomines as well as T. cruzi reservoirs and may be an effective and practical target for host-targeted insecticide deployment. We hypothesized that treating dogs with commercially available systemic insecticides (labeled for flea and tick control) would result in mortality of triatomines after consuming treated blood. We enrolled 16 privately owned dogs into five treatment groups to receive either fluralaner (Bravecto) or lotilaner (Credelio), alone or in combination with ivermectin. Blood from dogs before the initiation of treatment served as controls. Blood was collected 0, 7, 30, 45, and 90 days after the initial canine insecticide treatment and fed to 10 Triatoma gerstaeckeri nymphs through a membrane feeder, and survival was tracked daily for 7 days and weekly thereafter. All triatomines in the control and ivermectin groups survived the initial period, with no significant difference in long-term survival. In contrast, 99.7% of triatomines that fed on blood from dogs treated with either fluralaner or lotilaner died within 3 days. Although the impact of canine treatment on suppressing vector populations is unknown, fluralaner and lotilaner appear to be a compelling option for an integrated vector management approach to triatomine control.


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