Abundant triatomines in Texas dog kennel environments: Triatomine collections, infection with Trypanosoma cruzi, and blood feeding hosts

Busselman, R.E.; Curtis-Robles, R.; Meyers, A.C.; Zecca, I.B.; Auckland, L.D.; Hodo, C.L.; Christopher, D.; Saunders, A.B.; Hamer, S.A.

doi:10.1016/j.actatropica.2023.107087

Acta Tropica

2024

DOI: 10.1016/j.actatropica.2023.107087

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Abundant triatomines in Texas dog kennel environments: Triatomine collections, infection with Trypanosoma cruzi, and blood feeding hosts

R.E. Busselman,

R. Curtis-Robles,

A.C. Meyers

et al.

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Cited by 2 publications

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Merging ecology and control of vectors as a strategy to reduce zoonotic risks: An introduction to the special issue

Córdoba-Aguilar,

Beier

2024

Acta Tropica

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Merging ecology and control of vectors as a strategy to reduce zoonotic risks: An introduction to the special issue

Córdoba-Aguilar,

Beier

2024

Acta Tropica

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Viable Trypanosoma cruzi cultured from a dead Paratriatoma lecticularia (Hemiptera: Reduviidae) encountered in a large dog kennel environment in south Texas, USA

Busselman,

Killets,

Saunders

et al. 2024

Journal of Medical Entomology

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Trypanosoma cruzi (Chagas, 1909) is a protozoan parasite transmitted by triatomine (Hemiptera: Reduviidae) insects and is the causative agent of Chagas disease. Oral transmission of the parasite occurs through consumption of contaminated food or infected triatomines and may depend on the degree to which T. cruzi survives in triatomine abdomens. Dead triatomines may be abundant in areas with insecticide use, such as dog kennels where animals may encounter them. We attempted to culture T. cruzi from the gut material of 108 triatomines collected near dog kennels—14 found alive and 94 found dead—and also tested for T. cruzi DNA and discrete typing units using PCR. In total, 30 (27.8%) tested positive for T. cruzi using PCR, 5 alive (35.7%) and 25 dead (26.6%), with no difference in infection between insects found alive versus dead (P-value = 0.53) and more PCR positives identified in dead triatomines with intact gut contents than in dead desiccated triatomines (P-value = 0.049). One Paratriatoma lecticularia (Stål, 1859) that was found dead (1.1%, n = 94) had T. cruzi growth in culture. Given the use of bleach for external decontamination of triatomines as well as the level of bacterial and fungal contamination of cultures, both of which may have impacted the growth of T. cruzi, the apparent prevalence of viable parasites in this study should be interpreted as a conservative estimate. Vector control initiatives should consider that dead insects may still pose a risk of T. cruzi transmission to animals and humans.

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Abundant triatomines in Texas dog kennel environments: Triatomine collections, infection with Trypanosoma cruzi, and blood feeding hosts

Cited by 2 publications

References 82 publications

Merging ecology and control of vectors as a strategy to reduce zoonotic risks: An introduction to the special issue

Merging ecology and control of vectors as a strategy to reduce zoonotic risks: An introduction to the special issue

Viable Trypanosoma cruzi cultured from a dead Paratriatoma lecticularia (Hemiptera: Reduviidae) encountered in a large dog kennel environment in south Texas, USA

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