scholarly journals Oriented responses of the triatomine bugs Rhodnius prolixus and Triatoma infestans to vertebrate odours on a servosphere

1995 ◽  
Vol 176 (4) ◽  
Author(s):  
J. Taneja ◽  
P.M. Guerin
Keyword(s):  
Rhodnius Prolixus ◽  
Triatoma Infestans ◽  
Triatomine Bugs

Rearing triatomine bugs in the absence of a live host and some effects of diet on reproduction in Rhodnius prolixus Stål (Hemiptera: Reduviidae)

1978 ◽  
Vol 68 (2) ◽  
pp. 243-250 ◽  
Author(s):  
P. A. Langley ◽  
R. W. Pimley
Keyword(s):  
Silicone Rubber ◽  
Rhodnius Prolixus ◽  
Triatoma Infestans ◽  
Adult Size ◽  
Egg Hatch ◽  
Egg Weight ◽  
Panstrongylus Megistus ◽  
Three Generations ◽  
Triatomine Bugs ◽  
Two Generations

AbstractRhodnius prolixus Stȧl was successfully reared for three generations on a diet of defibrinated pig blood fed through Parafilm or silicone-rubber membranes. Reproduction in terms of the number and sizes of eggs produced was superior to, while survival from egg to adult was equal to that reported for, insects fed on live hosts. The technique appears equally applicable to the rearing of Panstrongylus megistus (Burm.), Triatoma infestans (Klug) and T. brasiliensis Neiva. The inadequacy of cow blood as a diet for R. prolixus was manifested in a decrease in adult size after two generations and in a reduction of egg weight from 30 to around 16 mg per female per week. This was accompanied by a corresponding reduction in egg hatch from 90 to about 50%.

scholarly journals Elucidating the Mechanism of Trypanosoma cruzi Acquisition by Triatomine Insects: Evidence from a Large Field Survey of Triatoma infestans

2020 ◽  
Vol 5 (2) ◽  
pp. 87
Author(s):  
Aaron W. Tustin ◽  
Ricardo Castillo-Neyra ◽  
Laura D. Tamayo ◽  
Renzo Salazar ◽  
Katty Borini-Mayorí ◽  
...  
Keyword(s):  
Trypanosoma Cruzi ◽  
Regression Models ◽  
Control Strategies ◽  
Protozoan Parasite ◽  
Etiologic Agent ◽  
Triatoma Infestans ◽  
Large Field ◽  
Blood Sucking ◽  
Triatomine Bugs ◽  
Cruzi Infection

Blood-sucking triatomine bugs transmit the protozoan parasite Trypanosoma cruzi, the etiologic agent of Chagas disease. We measured the prevalence of T. cruzi infection in 58,519 Triatoma infestans captured in residences in and near Arequipa, Peru. Among bugs from infected colonies, T. cruzi prevalence increased with stage from 12% in second instars to 36% in adults. Regression models demonstrated that the probability of parasite acquisition was roughly the same for each developmental stage. Prevalence increased by 5.9% with each additional stage. We postulate that the probability of acquiring the parasite may be related to the number of feeding events. Transmission of the parasite does not appear to be correlated with the amount of blood ingested during feeding. Similarly, other hypothesized transmission routes such as coprophagy fail to explain the observed pattern of prevalence. Our results could have implications for the feasibility of late-acting control strategies that preferentially kill older insects.

scholarly journals Situação do controle da transmissão vetorial da doença de Chagas nas Américas

2000 ◽  
Vol 16 (suppl 2) ◽  
pp. S35-S42 ◽  
Author(s):  
Antonio Carlos Silveira
Keyword(s):  
Rhodnius Prolixus ◽  
Triatoma Infestans

Este trabalho identifica e descreve distintas situações do ponto de vista epidemiológico em relação à transmissão natural da doença de Chagas no continente. A importância relativa das principais espécies de vetor na veiculação da doença e o nível de controle que se pode pretender em cada caso são examinados. Apresentam-se as estimativas existentes no que concerne à população sob risco, bem como ao número de casos de infecção e de doença crônica. Por fim discutem-se as perspectivas do controle, com base nos resultados obtidos e que podem ser colhidos com a introdução de espécies como Triatoma infestans, no Cone Sul, e Rhodnius prolixus, em parte da América Central e com as demais espécies, autóctones das áreas onde são encontradas. Além disso, questiona-se o papel que os demais mecanismos de transmissão poderão representar na manutenção da endemia chagásica.

scholarly journals Arthropod transmission of rabbit fibromatosis (Shope)

1959 ◽  
Vol 57 (1) ◽  
pp. 1-30 ◽  
Author(s):  
Herbert T. Dalmat
Keyword(s):  
Aedes Aegypti ◽  
Culex Pipiens ◽  
Rhodnius Prolixus ◽  
Triatoma Infestans ◽  
Cimex Lectularius ◽  
Virus Titre ◽  
Virus Suspension ◽  
Anopheles Quadrimaculatus ◽  
Domestic Rabbits ◽  
Reduviid Bugs

The mosquitoes Aedes aegypti, A. triseriatus, Culex pipiens, C. quinquefasciatus, and Anopheles quadrimaculatus were all found to be efficient experimental vectors of Shope's virus-induced fibromas of cottontail rabbits, transmitting the virus during interrupted feedings as well as after long intervals from an infective meal. The reduviid bugs, Triatoma infestans, T. phyllosoma pallidipennis and Rhodnius prolixus, and the bedbug, Cimex lectularius, were also capable of transmitting fibroma by interrupted or delayed feeding.Evidence from various types of experiments indicated that arthropod transmission is mechanical, the virus being extremely stable in the insects. Some experiments did indicate the possibility of virus proliferation. Although mosquitoes did seem to serve as ‘flying pins’ when transmitting virus by interrupted feeding, they certainly were distinctive in that they maintained their ability to transmit for very long periods of time. To transmit fibromas, arthropods actually must draw virus up between the stylets of the mouthparts; mosquitoes were unable to transmit by feeding through skin moistened with a suspension of fibroma virus or by feeding subsequent to having their mouthparts painted with a virus suspension.While cottontail tumours at peak virus titres are always infective for suitable insects, the fibromas of adult domestic rabbits generally are not infective, even though the virus titre is equivalent. However, the tumours of suckling domestic rabbits do become infective for insects.

scholarly journals Structure Determination of Juvenile Hormone from Chagas Disease Vectors, Rhodnius prolixus and Triatoma infestans

2020 ◽  
Vol 49 (5) ◽  
pp. 538-541
Author(s):  
Keiji Matsumoto ◽  
Yoko Yasuno ◽  
Kohei Yasuda ◽  
Tsuyoshi Hayashi ◽  
Shin G. Goto ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Chagas Disease ◽  
Structure Determination ◽  
Rhodnius Prolixus ◽  
Triatoma Infestans ◽  
Disease Vectors ◽  
Chagas Disease Vectors

The Triatominae (Hemiptera: Heteroptera: Reduviidae) of Veracruz, Mexico: geographic distribution, taxonomic redescriptions, and a key

Zootaxa ◽  
2012 ◽  
Vol 3487 (1) ◽  
pp. 1 ◽  
Author(s):  
CÉSAR ANTONIO SANDOVAL-RUIZ ◽  
LUIS CERVANTESPEREDO ◽  
FREDY SEVERO MENDOZA-PALMERO ◽  
SERGIO IBÁÑEZ-BERNAL
Keyword(s):  
Literature Review ◽  
Chagas Disease ◽  
Geographic Distribution ◽  
The State ◽  
Triatoma Infestans ◽  
Museum Collections ◽  
Key To Species ◽  
Distribution Maps ◽  
Annotated List ◽  
Triatomine Bugs

An annotated list of the triatomine bugs from Veracruz, Mexico, is presented. The list is mainly based on field collections, but also on literature review and museum collections. Ten species in five genera and two tribes are known in the state. Two species, Triatoma dimidiata (Latreille), the most common and widely distributed, and Triatoma gerstaeckeri (Stål), are the most important vectors of Chagas disease in the region. Panstrongylus rufotuberculatus (Champion), Belminus costarricensis Herrer, Lent & Wygodzinsky, and Eratyrus cuspidatus (Stål) are confined to sylvan habitats in the south of the state. Triatoma rubida (Uhler) probably represent a misidentification. The presence of Meccus pallidipennis Stål, Panstrogylus geniculatus (Latrielle), Triatoma barberi Usinger, and Triatoma infestans (Klug) are fortuitous. GARP distribution maps are provided for T. dimidiata and T. gerstaeckeri. A key to species and photographs of the adults of the ten species are also included.

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