Electroantennogram responses of the Triatoma dimidiata complex to volatiles produced by its exocrine glands

May-Concha, Irving; Guerenstein, Pablo G.; Malo, Edi A.; Catalá, Silvia; Rojas, Julio C.

doi:10.1016/j.actatropica.2018.06.018

Cited by 11 publications

(11 citation statements)

References 48 publications

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“…Besides, that study describes a chemical signal which promotes the attraction of males to volatiles emitted by females and to mating couples [30]. On the other side, based on previous works on olfactory receptors [24][25][26], we propose that the increased number of TH chemo-sensilla in infected males could suggest a greater e ciency in the perception of odor molecules involved in sexual communication compared with infected females. In contrast, the increased number of BA chemo-sensilla in infected females could suggest a greater e ciency in the perception of host odors compared with infected males.…”

Section: Discussionmentioning

confidence: 73%

“…In insects, the olfactory system plays an important role in many behavioral contexts, such as food, refuges and mate nding, alarm and aggregation behaviors, as well as avoidance of natural enemies [24]. In triatomines, the antennal phenotype (AP) comprises the type and number of sensilla (classi ed as mechanoreceptors and chemoreceptors) distributed on the antennae.…”

Section: Introductionmentioning

confidence: 99%

“…In triatomines, the antennal phenotype (AP) comprises the type and number of sensilla (classi ed as mechanoreceptors and chemoreceptors) distributed on the antennae. Sensilla act as an interface between the external and internal environments of insects (inter and intraspeci c communication), capturing different stimuli from the external environment and directing them to the central nervous system [24][25][26]. This then triggers speci c behavioral responses, such as the selection of a host for feeding, oviposition behavior, mate nding, as well as alarm and aggregation behaviors [27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Trypanosoma Cruzi Affects The Sensory Biology of Triatoma Dimidiata (Hemiptera: Reduviidae).

May-Concha

Talavera

Dujardin

et al. 2021

Preprint

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Background: Triatoma dimidiata is a vector of the protozoan parasite Trypanosoma cruzi, the etiologic agent of Chagas disease. Phenotypic plasticity allows an organism to adjust its phenotype in response to stimuli or environmental conditions. Understanding the effect of T. cruzi on the phenotypic plasticity of its vectors, known as triatomines, has attracted great interest because of the implications of the parasite-triatomine interactions in the eco-epidemiology and transmission of the parasite. We investigated whether the infection of the vector with T. cruzi can change the antennal phenotype of sylvatic, domestic, and laboratory-reared populations of T. dimidiata. Methods: The abundance of each type of sensillum (bristles, basiconic, thick- and thin-walled trichoid) on the antennae of T. cruzi-infected and non-infected T. dimidiata reared in the laboratory or collected in sylvatic and domestic ecotopes were measured under light microscopy and compared using Kruskal–Wallis non-parametric tests and Permutational Multivariate Analysis of Variance. Results: We found significant differences between sensilla patterns of infected and non-infected insects within sylvatic and domestic populations. Conversely, we found no significant differences between sensilla patterns of infected and non-infected insects within the laboratory-reared population. Besides, our results show that the infection with T. cruzi affects the sexual dimorphism linked to antennal phenotype in sylvatic and domestic populations. Conclusion: These differences could be linked, for infected insects, to higher efficiency in the perception of odor molecules related to the search of distant mates and hosts and for flight dispersal in search of new habitats, and the possibility of a positive effect on population dynamics and on the vectorial transmission of T. cruzi.

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Section: Discussionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Trypanosoma Cruzi Affects The Sensory Biology of Triatoma Dimidiata (Hemiptera: Reduviidae).

May-Concha

Talavera

Dujardin

et al. 2021

Preprint

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show abstract

“…Triatomines' nymphs and adults are strict blood-sucking insects that feed on vertebrate species available in their habitat [20]. The olfactory system plays an important role in many behavioral contexts, such as host-seeking, refuges and mate nding, alarm and aggregation behaviors, as well as avoidance of natural enemies [24]. In triatomines, the antennal phenotype (AP) comprises the type and number of sensilla (classi ed as mechanoreceptors and chemoreceptors) distributed on the antennae.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Does Trypanosoma cruzi modify the antennal phenotype of Triatoma dimidiata (Hemiptera: Reduviidae)?

Jean-Pierre.

et al. 2022

Preprint

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Background: Triatoma dimidiata is a vector of the protozoan parasite Trypanosoma cruzi, the etiologic agent of Chagas disease. Phenotypic plasticity allows an organism to adjust its phenotype in response to stimuli or environmental conditions. Understanding the effect of T. cruzi on the phenotypic plasticity of its vectors, known as triatomines, has attracted great interest because of the implications of the parasite-triatomine interactions in the eco-epidemiology and transmission of the parasite. We investigated if the infection of the vector with T. cruzi may be associated with a change in the antennal phenotype of sylvatic, domestic, and laboratory-reared populations of T. dimidiata. Methods: The abundance of each type of sensillum (bristles, basiconic, thick- and thin-walled trichoid) on the antennae of T. cruzi-infected and non-infected T. dimidiatareared in the laboratory or collected in sylvatic and domestic ecotopes were measured under light microscopy and compared using Kruskal–Wallis non-parametric tests and Permutational Multivariate Analysis of Variance. Results: We found significant differences between sensilla patterns of infected and non-infected insects within sylvatic and domestic populations. Conversely, we found no significant differences between sensilla patterns of infected and non-infected insects within the laboratory-reared population. Besides, for sylvatic and domestic populations, sexual dimorphism tended to be increased in infected insects. Conclusion: The differences observed in infected insects could be linked to higher efficiency in the perception of odor molecules related to the search for distant mates and hosts and the flight dispersal in search of new habitats. In addition, these insects could have a positive effect on population dynamics and the transmission of T. cruzi.

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Chemical ecology of triatomines: current knowledge and implications for Chagas disease vector management

Alavez-Rosas,

Vargas-Abasolo,

Albores-Flores

et al. 2023

J Pest Sci

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Triatomines (Hemiptera: Heteroptera: Reduviidae), commonly known as conenose or kissing bugs, includes species of outstanding medical importance given their role as vectors of the protozoan parasite Trypanosoma cruzi Chagas (Kinetoplastida: Trypanosomatidae), the aetiological agent of Chagas disease. Herein, we present an updated review of the chemical ecology of triatomines, with special reference to molecules involved in the communication of these insects. Infochemicals, including hormones and semiochemicals (pheromones and allelochemicals), have a pivotal role in mediating information and shaping interactions within and between triatomines, during distinct behavioural contexts. We analyse the new findings about the chemical composition of alarm, aggregation and sex pheromones, as well as on cuticular hydrocarbons, host attractants and repellents. We also discuss how triatomine hormones may serve as communication signals and highlight the importance of the reverse chemical ecology approach in studying the complex chemoecology of these arthropod vectors. In the final section, we outline how knowledge about triatomine chemical ecology can be used for implementing real-world control operations with proven epidemiological impact.

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Electroantennogram responses of the Triatoma dimidiata complex to volatiles produced by its exocrine glands

Cited by 11 publications

References 48 publications

Trypanosoma Cruzi Affects The Sensory Biology of Triatoma Dimidiata (Hemiptera: Reduviidae).

Trypanosoma Cruzi Affects The Sensory Biology of Triatoma Dimidiata (Hemiptera: Reduviidae).

Does Trypanosoma cruzi modify the antennal phenotype of Triatoma dimidiata (Hemiptera: Reduviidae)?

Chemical ecology of triatomines: current knowledge and implications for Chagas disease vector management

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