The Physiology of Sperm Transfer and Egg Production in Vectors of Chagas Disease with Particular Reference to Rhodnius prolixus

Chiang, R. Gary; Chiang, Jennifer A.

doi:10.1007/978-3-030-64548-9_13

Cited by 5 publications

(1 citation statement)

References 55 publications

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“…These changes are induced by the proteins and other molecules carried in the male's ejaculate. These mating factors result in the mated females being quite different from virgin females [7,[14][15][16][17][18][19]. The transfer of sperm and fluids occurs during copulation and is facilitated through the coordinated contractions of the muscles within the male reproductive system.…”

Section: Introductionmentioning

confidence: 99%

The Male Reproductive System of the Kissing Bug, Rhodnius prolixus Stål, 1859 (Hemiptera: Reduviidae: Triatominae): Arrangements of the Muscles and the Myoactivity of the Selected Neuropeptides

Lange

Kisana

Leyria

et al. 2023

Insects

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The gross anatomy of the male reproductive structures and their associated musculature are described in the blood-gorging vector of Chagas disease, Rhodnius prolixus. The male reproductive system is composed of muscular tissues each performing contractions that aid in the movement of sperm out of the testis into the vas deferens, seminal vesicle and then into the ejaculatory duct, along with proteins and lipids from the transparent and opaque accessory glands. Phalloidin staining shows the various patterns of muscle fiber layers, from thin circular to more complex crisscross patterns, implying subtle differences in the form of the contractions and movement of each of the structures, allowing for waves of contractions or twisting patterns. The transcripts for the receptors for proctolin, myosuppressin (RhoprMS) and for the extended FMRFamides are expressed in the various regions of the reproductive system, and the nerve processes extending over the reproductive structures are positive for FMRFamide-like immunoreactivity, as are neurosecretory cells lying on the nerves. Proctolin and AKDNFIRFamide are strong stimulators for the frequency of the contractions, and RhoprMS can inhibit the proctolin-induced contractions. Taken together, this work implicates these two families of peptides in coordinating the male reproductive structures for the successful transfer of sperm and the associated accessory gland fluid to the female during copulation.

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Section: Introductionmentioning

confidence: 99%

The Male Reproductive System of the Kissing Bug, Rhodnius prolixus Stål, 1859 (Hemiptera: Reduviidae: Triatominae): Arrangements of the Muscles and the Myoactivity of the Selected Neuropeptides

Lange

Kisana

Leyria

et al. 2023

Insects

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Crossing experiments detect partial reproductive isolation among populations ofTriatoma longipennis(Hemiptera: Reduviidae: Triatominae)

Martínez-Ibarra,

Nogueda-Torres,

Meraz-Medina

et al. 2023

Journal of Medical Entomology

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Chagas disease is an important vector-borne disease endemic in Mexico. Of the 33 triatomine species found in Mexico, Triatoma longipennis (Usinger) is considered among the most important because of its infection indices, capacity for transmitting Trypanosoma cruzi (Chagas), and its distribution areas. Here, we describe the results of a reproductive isolation analysis among 5 populations of T. longipennis collected from representative areas of Mexico. Fertility and segregation of morphological characteristics were examined in two generations of hybrids. The percentage of pairs with (fertile) offspring varied from 30% to 100% in the parental crosses, while these values varied from 0 to 100% in the intersite crosses. Our results indicate partial reproductive isolation among these populations. These findings shed light on the potential presence of a cryptic species complex of T. longipennis in Mexico.

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

Martínez-Ibarra,

Grant-Guillén,

Nogueda-Torres

et al. 2024

Journal of Medical Entomology

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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.

show abstract

The Physiology of Sperm Transfer and Egg Production in Vectors of Chagas Disease with Particular Reference to Rhodnius prolixus

Cited by 5 publications

References 55 publications

The Male Reproductive System of the Kissing Bug, Rhodnius prolixus Stål, 1859 (Hemiptera: Reduviidae: Triatominae): Arrangements of the Muscles and the Myoactivity of the Selected Neuropeptides

The Male Reproductive System of the Kissing Bug, Rhodnius prolixus Stål, 1859 (Hemiptera: Reduviidae: Triatominae): Arrangements of the Muscles and the Myoactivity of the Selected Neuropeptides

Crossing experiments detect partial reproductive isolation among populations ofTriatoma longipennis(Hemiptera: Reduviidae: Triatominae)

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

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