The role of salivary nitrophorins in the ingestion of blood by the triatomine bug Rhodnius prolixus (Reduviidae: Triatominae)

Araújo, Ricardo Nascimento; Soares, Adriana C.; Paim, Rafaela M.M.; Gontijo, Nelder Figueiredo; Gontijo, Alberto F.; Lehane, Michael J.; Pereira, Marcos H.

doi:10.1016/j.ibmb.2008.10.002

Cited by 44 publications

(29 citation statements)

References 34 publications

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“…Feeding time ( operating without difficulty, electrical signals exhibit spikes with regular shapes (single peaks) (Araujo et al, 2009b;Soares et al, 2014). Irregular shaped spikes may indicate a lack of synchrony between the muscle bundles responsible for operating the suction pump.…”

Section: Discussionmentioning

confidence: 99%

Physiological characterization of the hematophagy ofOrnithodoros rostratus(Acari: Argasidae) on live hosts

Costa

Soares

Pereira

et al. 2016

Journal of Experimental Biology

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Ornithodoros rostratus is an argasid tick and its importance is based on its hematophagy and the resulting transmission of pathogens such as Rickettsia rickettsii and Coxiella burnetii to its vertebrate hosts. In the face of a lack of physiological studies related to hematophagy in argasid ticks, this paper aims to identify and characterize the events that occur throughout the feeding by O. rostratus on live hosts. Electrical signals and alterations on the feeding site were monitored using intravital microscopy and electromyography. The analyses allowed for the characterization of four distinct events: suction, salivation, chelicerae movements and inactivity. Feeding was divided into two distinct phases: (1) penetration of mouthparts (when only salivation and chelicerae movements occurred) and the formation of the feeding pool (salivation and chelicerae movements with the first signs of suction) and (2) engorgement, during which chelicerae movements ceased and blood intake took place in feeding complexes (salivation followed by suction). Variations in patterns of the electrical signals, suction frequency and salivation showed four distinct subphases: (2a) suction with electrical signals of irregular shape, increased suction frequency and decreased salivation frequency throughout blood feeding; (2b) suction with electrical signals of symmetrical shape, high suction rates (3.8 Hz on average) and feeding complexes lasting for 7.7 s; (2c) suction with electrical signals of irregular shape, high suction frequency and feeding complex lasting 11.5 s; and (2d) electrical signals with no profile and the longest feeding complexes (14.5 s). Blood feeding ended with the withdrawal of the mouthparts from the host's skin.

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Section: Discussionmentioning

confidence: 99%

Physiological characterization of the hematophagy ofOrnithodoros rostratus(Acari: Argasidae) on live hosts

Costa

Soares

Pereira

et al. 2016

Journal of Experimental Biology

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“…The feeding process of triatomine bugs greatly varies among species and it is influenced by various factors, such as the characteristics of the feeding apparatus and the composition of the saliva, as well as the physiology of the host and the feeding site (Guarneri et al 2000, Araujo et al 2009). Therefore, the capacity to explore available food resources can directly influence the population dynamics and the vectorial capacity of triatominae (Pereira et al 2006).…”

Section: Discussionmentioning

confidence: 99%

“…This was especially true in experiments with mice, if we compare the frequency spectra obtained during the R. prolixus nymphs feeding on mice when similar experimental conditions were followed (Araujo et al 2009). Our results corroborate the current knowledge on the biology and the behavior of T. vitticeps.…”

Section: Discussionmentioning

confidence: 99%

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Feeding behavior of Triatoma vitticeps (Reduviidae: Triatominae) in the state of Minas Gerais, Brazil

Souza¹,

Soares

Alves

et al. 2011

Mem. Inst. Oswaldo Cruz

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The objective of this study was to evaluate the feeding behavior of Triatoma vitticeps through the identification of its food sources and the characterization of the blood ingestion process. In addition, we aimed to verify if the saliva of this vector interferes with the perception of the host during the feedings by creating a nervous impulse. Here, we demonstrated that the T. vitticeps saliva reduces, gradually and irreversibly, the amplitude of the compound action potential of the nervous fibre, which helps decrease the perception of the insect by the host. The precipitin reaction demonstrated the feeding eclecticism of this vector, with the identification of eight food sources - most of them found simultaneously in the same insect. The analysis of the electrical signals produced by the cibarial pump during meals demonstrated that the best feeding performance of T. vitticeps nymphs that fed on pigeons is mainly due to the higher contraction frequency of the pump. The longer contact period with the host to obtain a complete meal compared with other triatominae species of the same instar could favor the occurrence of multiple blood sources in T. vitticeps under natural conditions, as it was evidenced by the precipitin test

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“…The analysis of feeding parameters based on cibarial pump electromyograms of different triatomine species feeding on pigeons, mice, humans or artificial feeders has provided sufficient information for us to know whether any differences were due the host type (Guarneri et al, 2000), triatomine species (Sant'Anna et al, 2001) or developmental stage (Guarneri et al, 2003) or to molecules produced in the salivary glands (Araujo et al, 2009a) or intestine (Araujo et al, 2007) of the insect. The QLC and maximum pumping frequency (obtained from experiments using artificial feeders) are related to the intrinsic morphlogical characteristics of the insect mouthparts.…”

Section: Electromyogram Studies Of the Cibarial Pumpmentioning

confidence: 99%

Electromyogram of the Cibarial Pump and the Feeding Process in Hematophagous Hemiptera

Araújo¹,

Gontijo²,

Guarneri³

et al. 2011

Advances in Applied Electromyography

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The role of salivary nitrophorins in the ingestion of blood by the triatomine bug Rhodnius prolixus (Reduviidae: Triatominae)

Cited by 44 publications

References 34 publications

Physiological characterization of the hematophagy ofOrnithodoros rostratus(Acari: Argasidae) on live hosts

Physiological characterization of the hematophagy ofOrnithodoros rostratus(Acari: Argasidae) on live hosts

Feeding behavior of Triatoma vitticeps (Reduviidae: Triatominae) in the state of Minas Gerais, Brazil

Electromyogram of the Cibarial Pump and the Feeding Process in Hematophagous Hemiptera

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