• Trypanosoma cruzi infection en...

*Result*: Trypanosoma cruzi infection enhances olfactory response in Triatoma pallidipennis Stål (Hemiptera: Triatominae) to compounds potentially useful for insect control.

Title:
Trypanosoma cruzi infection enhances olfactory response in Triatoma pallidipennis Stål (Hemiptera: Triatominae) to compounds potentially useful for insect control.
Authors:
Jiménez-Santiago B; Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico.; Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Circuito de Posgrados, Ciudad Universitaria, Mexico City, Mexico., Flores-Villegas AL; Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico., Cruz-Esteban S; Instituto de Ecología, A.C., Centro Regional del Bajío, Red de Diversidad Biológica del Occidente Mexicano., Pátzcuaro, Michoacán, Mexico.; CONAHCYT, Ciudad de México, Mexico., Cabrera-Bravo M; Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico., Toriello C; Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Source:
Medical and veterinary entomology [Med Vet Entomol] 2025 Mar; Vol. 39 (1), pp. 160-170. Date of Electronic Publication: 2024 Oct 14.
Publication Type:
Journal Article
Language:
English
Journal Info:
Publisher: Published for the Royal Entomological Society of London by Blackwell Scientific Publications Country of Publication: England NLM ID: 8708682 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1365-2915 (Electronic) Linking ISSN: 0269283X NLM ISO Abbreviation: Med Vet Entomol Subsets: MEDLINE
Imprint Name(s):
Original Publication: Oxford ; Boston : Published for the Royal Entomological Society of London by Blackwell Scientific Publications, [c1987-
MeSH Terms:
Triatoma*/parasitology , Triatoma*/physiology , Triatoma*/growth & development , Triatoma*/drug effects , Trypanosoma cruzi*/physiology , Insect Control*/methods , Insect Vectors*/parasitology , Insect Vectors*/physiology , Insect Vectors*/drug effects , Pheromones*/pharmacology, Animals ; Nymph/parasitology ; Nymph/growth & development ; Nymph/physiology ; Nymph/drug effects ; Octanols/pharmacology ; Chagas Disease/transmission ; Odorants
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Contributed Indexing:
Keywords: Triatoma pallidipennis; Trypanosoma cruzi; chemical attraction; chemical ecology
Substance Nomenclature:
0 (Pheromones)
0 (Octanols)
WXB511GE38 (1-octen-3-ol)
0 (insect attractants)
Entry Date(s):
Date Created: 20241014 Date Completed: 20250424 Latest Revision: 20250515
Update Code:
20260130
PubMed Central ID:
PMC11793133
DOI:
10.1111/mve.12770
PMID:
39400392
Database:
MEDLINE

*Further Information*

*In Mexico, Triatoma pallidipennis is a major vector of Trypanosoma cruzi, the causative agent of Chagas disease. Current efforts are focused on developing attractants to control these vectors, using volatile substances derived from vertebrate hosts or compounds known to attract hematophagous insects. However, the efficacy of these compounds in attracting parasite-infected triatomines remains to be evaluated. In this study, we assessed the attractant activity of octenol (1-octen-3-ol), nonanal and a mixture of odorants consisting of ammonium hydroxide, lactic acid and hexanoic acid (in a ratio of 1:0.2:0.4 respectively), at concentrations of 1, 10 and 100 ng on the N3, N4 and N5 nymphal stages of T. pallidipennis, both infected and non-infected with T. cruzi. We also evaluated the synergistic effect of the most effective compounds and doses. All experiments were performed in a laboratory using a Y-type glass olfactometer. We found that both infected and non-infected N3 and N4 nymphs were attracted to low doses of octenol, nonanal and the odorant mixture. Particularly noteworthy was the synergistic effect observed between the odorant mixture and nonanal, which significantly increased attraction of T. cruzi-infected individuals. These findings contribute to the development of baited traps utilising these compounds for monitoring triatomines in epidemiological studies or for mass trapping to control these vectors.
(© 2024 The Author(s). Medical and Veterinary Entomology published by John Wiley & Sons Ltd on behalf of Royal Entomological Society.)*