Circadian control of photonegative sensitivity in the haematophagous bug Triatoma infestans

Reisenman, Carolina E.; Lazzari, Claudio R.; Giurfa, Martín

doi:10.1007/s003590050279

Cited by 62 publications

(58 citation statements)

References 27 publications

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“…Triatominae insects exposed to constant light sources exhibit a strong, negative, phototactic response (29) . Our experiments used this phototactic response to induce infected Rhodnius prolixus to move to one of the four dark shelters with different temperatures available in the experimental arena.…”

Section: Discussionmentioning

confidence: 99%

“…A constant light source (Philips Genie 14W warm white) in the center of the arena was placed 9cm from the acrylic cover to provide 24h illumination to the arena (Figure 1). The light source induced insects to search for a shelter to avoid lights (29) . Two rectangular (10cm × 20cm × 5cm) and unconnected shelters were placed on each of the thermal plates.…”

Section: Experimental Arena and Sheltersmentioning

confidence: 99%

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Behavioral fever response in Rhodnius prolixus (Reduviidae: Triatominae) to intracoelomic inoculation of Trypanosoma cruzi

Hinestroza¹,

Ortiz

Molina

2016

Rev. Soc. Bras. Med. Trop.

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Introduction: Behavioral fever is a response to infections with microorganisms observed in some poikilothermic animals. Rhodnius prolixus is involved in the transmission of two parasites: Trypanosoma cruzi (pathogenic for humans and transmitted in feces) and Trypanosoma rangeli (non-pathogenic for humans, pathogenic for Rhodnius and transmitted by the bite of an infected individual). Only T. rangeli is found in the hemolymph of Rhodnius as it travels to the salivary glands. Methods: To study vector-parasite interactions, we evaluated possible behavioral fever responses of R. prolixus to intracoelomic inoculation with T. cruzi or T. rangeli. Temperature preferences of fi fth-instar nymphs of R. prolixus were evaluated after inoculation with T. rangeli KP1(+), KP1(-), T. cruzi I, or the Trypanosome culture medium. Four different fi xed temperatures (25, 30, 35, and 40°C) in two simultaneous experiments (enclosed and free-moving insects) were evaluated. Free-moving insects were marked daily according to their temperature preferences on each of the 15 days after inoculation. Numbers of insects in each temperature shelter and daily mortality were compared with those enclosed shelters of different temperatures. Results: Rhodnius prolixus inoculated with both strains of T. rangeli and with the trypanosome culture medium showed preferences for the lowest temperatures (25°C). However, R. prolixus inoculated with T. cruzi I showed signifi cant preferences for temperatures around 35°C. Conclusions: This is the fi rst known investigation to demonstrate a behavioral fever response in R. prolixus injected intracoelomically with T. cruzi I.

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Section: Discussionmentioning

confidence: 99%

Section: Experimental Arena and Sheltersmentioning

confidence: 99%

Behavioral fever response in Rhodnius prolixus (Reduviidae: Triatominae) to intracoelomic inoculation of Trypanosoma cruzi

Hinestroza¹,

Ortiz

Molina

2016

Rev. Soc. Bras. Med. Trop.

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“…The positions of the insects were recorded by means of an infrared-sensitive video camera, which had its own illumination system composed of 6 IR light emitting diodes (LED's) (900 nm) and 4 extra pairs of IR-LED's placed at each corner of the arena in order to provide homogeneous illumination. This light is invisible for the bugs (Reisenman et al, 1998).…”

Section: Methodsmentioning

confidence: 99%

Temperature preference in Rhodnius prolixus, effects and possible consequences

Schilman

Lazzari

2004

Acta Tropica

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“…2a); this response can be used to trap pests, but the effective wavelengths and intensities vary among species (Coombe 1981;Hardie 1989;Kinoshita and Arikawa 2000;Menzel and Greggers 1985;Yang et al 2003) and (B) repulsion (i.e., negative phototaxis, moving away from light) (Fig. 2b); this can be used to prevent pests from entering a cultivation area by presenting light at wavelengths and intensities that repel them (Jander 1963;Kim et al 2013;Reisenman et al 1998). …”

Section: Influences Of Light On Insect Behavior and Developmentmentioning

confidence: 99%

Insect reactions to light and its applications to pest management

2013

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Insects are able to see ultraviolet (UV) radiation. Nocturnal insects are often attracted to light sources that emit large amounts of UV radiation, and devices that exploit this behavior, such as light traps for forecasting pest outbreaks, and electric insect killers, have been developed. Some diurnal species are attracted to yellow; yellow pan traps are used for conducting surveys for pest outbreaks and yellow sticky plates are used for pest control. Lamps that give off yellow illumination have been used effectively to control the activity of nocturnal moths and thus reduce damage to fruit, vegetables, and flowers. Covering cultivation facilities with film that filters out near-UV radiation reduces the invasion of pests such as whiteflies and thrips into the facilities, thus reducing damage. Reflective material placed on cultivated land can control the approach of flying insects such as aphids. Future development and use of new light sources such as light-emitting diodes is anticipated for promoting integrated pest management.

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Circadian control of photonegative sensitivity in the haematophagous bug Triatoma infestans

Cited by 62 publications

References 27 publications

Behavioral fever response in Rhodnius prolixus (Reduviidae: Triatominae) to intracoelomic inoculation of Trypanosoma cruzi

Behavioral fever response in Rhodnius prolixus (Reduviidae: Triatominae) to intracoelomic inoculation of Trypanosoma cruzi

Temperature preference in Rhodnius prolixus, effects and possible consequences

Insect reactions to light and its applications to pest management

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