Life history data of a Triatoma protracta nahuatlae, T. sinaloensis, and their laboratory hybrids (Hemiptera: Reduviidae)

Chagas disease is one of the most significant vector-borne diseases in Mexico. The presence of “sylvatic” triatomine vectors of Trypanosoma cruzi (Chagas) inside human dwellings necessitates estimating their vectorial capacity. To estimate this capacity in Triatoma protracta nahuatlae (Ryckman), Tri...

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Bibliographic Details
Published in:Journal of medical entomology 2024-03, Vol.61 (2), p.309-317
Main Authors: Martínez-Ibarra, José Alejandro, Grant-Guillén, Yunuen, Nogueda-Torres, Benjamín, Meraz-Medina, Tzintli, Martínez-Grant, Diana Monserrat
Format: Article
Language:English
Subjects:
biology
Chagas disease
Defecation
DEVELOPMENT, LIFE HISTORY
Entomology
Epidemiology
Feeding
Hybrids
Infectious diseases
Life history
Mexico
Mortality
Parameters
Protozoa
secondary species
Surveillance
Triatoma
Triatoma protracta
triatomines
Vector-borne diseases
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Summary:Chagas disease is one of the most significant vector-borne diseases in Mexico. The presence of “sylvatic” triatomine vectors of Trypanosoma cruzi (Chagas) inside human dwellings necessitates estimating their vectorial capacity. To estimate this capacity in Triatoma protracta nahuatlae (Ryckman), Triatoma sinaloensis (Ryckman), and their laboratory hybrids, 6 biological parameters were examined. Triatoma sinaloensis exhibited the shortest development time (155 days), with a median of 12 blood meals. Mortality rates varied from 35% to 45% in the 3 studied cohorts. All 3 cohorts were aggressive, initiating feeding within 0.5–1 min, and had similar feeding periods ranging from 10 to 18 min. A majority (75.3–97.9%) of the hybrids defecated when feeding, immediately after feeding, or in less than 1 min post-feeding. In contrast, only 7–42% of nymphs of T. sinaloensis defecated during the same period. Our results regarding the 6 parameters studied confirm the potential role of T. p. nahuatlae as an efficient vector of T. cruzi. Triatoma sinaloensis, on the other hand, exhibited limited vectorial capacity primarily due to its poor defecation behavior. Continued surveillance of these “sylvatic” triatomine populations is necessary to prevent an epidemiological problem. Graphical Abstract
ISSN:0022-2585
1938-2928
1938-2928
DOI:10.1093/jme/tjae007