Formas anômalas de Triatoma infestans

Juarez, Edmundo

doi:10.1590/s0034-89101972000400010

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“…Anatomical studies of the triatomines are common and have contributed to the taxonomic, systematic and evolutionary knowledge of the vectors (Pinto, 1927;Galvão, 2014). However, little is known about anatomical teratologies in the subfamily Triatominae, being the majority of studies performed in Triatoma infestans (Carcavallo, 1967;Juárez, 1972;Carcavallo and Galíndez Girón, 1995;Jurberg et al, 1997). The teratologies are present in the structures of the head, thorax and abdomen of triatomines (Carcavallo et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…Although the teratologies of the triatomines generally are associated with hormonal dysfunction of the corpus allatum (responsible for producing juvenile hormone) (Juárez, 1972), the causes of their occurrence are very diverse (genetic basis or unfavorable conditions of the breeding environment), as described by Ryckman (1971). Triatomines exposed to 9-cis-retinoic acid (9cisRA) or juvenile hormone underwent profound morphological changes upon moult, generating abnormal 5th instar nymphs and also markedly increased the death of insects during the moulting (Nakamura et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Reproductive aspects of Chagas disease vectors (Hemiptera, Triatominae) with anatomical teratologies

et al. 2018

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As Chagas disease has no cure, vector control is the most effective method of preventing this neglected disease. Generally the anatomical teratologies are associated with hormonal dysfunction of the corpus allatum (juvenile hormone), presents genetic basis or unfavorable conditions, and are recessive and not sex linked. Thus, we characterize the male gonads and spermatogenesis of triatomines with anatomical teratologies to evaluate if the malformations interfere in the gametogenesis of these vectors. All teratogenic triatomines analyzed did not present presented gonadal dysgenesis and alterations in spermatogenesis. Thus, we characterize the presence of anatomical teratologies in some species of triatomines and demonstrate that these malformations in the external morphology do not interfere in the gonads and gametogenesis of these vectors. In addition, although new studies with the corpus allatum should be conducted we suggesting that the use of juvenile hormones does not present effectiveness in the reproductive control of these vectors.

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Section: Introductionmentioning

confidence: 99%