Orientation behaviour of the blood-sucking bug Triatoma infestans to short-chain fatty acids: Synergistic effect of L-lactic acid and carbon dioxide

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The role of short-chain fatty acids in the host-seeking behaviour of Triatoma infestans larvae was investigated using a locomotion compensator. Several short-chain fatty acids were tested alone over a wide range of doses, or in combination with L-lactic acid (L-LA; 100 μg). Bugs showed no attractive...

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Detalles Bibliográficos
Autores principales: Barrozo, R.B., Lazzari, C.R.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2004
Materias:
Carbon dioxide
Host orientation
L-lactic acid
Short-chain fatty acids
Synergism
Triatoma infestans
butyric acid
carbon dioxide
carboxylic acid derivative
chemical compound
hexanoic acid
lactic acid
propionic acid
short chain fatty acid
valeric acid
volatile fatty acid
animal behavior
animal experiment
article
chemical interaction
concentration response
controlled study
larva
mouse
nonhuman
orienting response
priority journal
stimulation
stimulus response
animal
drug effect
drug potentiation
locomotion
orientation
physiology
Triatoma
Animals
Behavior, Animal
Carbon Dioxide
Drug Synergism
Fatty Acids, Volatile
Lactic Acid
Larva
Locomotion
Mice
Orientation
Stimulation, Chemical
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0379864X_v29_n9_p833_Barrozo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The role of short-chain fatty acids in the host-seeking behaviour of Triatoma infestans larvae was investigated using a locomotion compensator. Several short-chain fatty acids were tested alone over a wide range of doses, or in combination with L-lactic acid (L-LA; 100 μg). Bugs showed no attractive response to single carboxylic acids, but when L-LA was added to airstreams carrying specific intensities of either propionic (C3; 100 μg), butyric (C4; 1 μg) or valeric acid (C5; 1 μg), these mixtures elicited an attractive response, evincing a synergistic effect. No orientation response was observed when caproic acid (C6) was offered with L-LA at the doses tested. Two blends were created: (1) C3, C4 and C5 combined at the effective doses when added with L-LA [C3C4C5 (1)], and (2) C3, C4 and C5 combined at a third of those intensities [C3C4C5 (2)]. Both blends were tested alone, with L-LA (100 μg), with a sub-threshold concentration of CO2 (300 p.p.m. above the ambient level), and combined with both compounds together. Oriented responses of bugs were only observed with the blend (2) added with L-LA and with the combination of this lure with CO2. This last combination evoked a behavioural response similar in intensity to that induced by a live mouse. © Oxford University Press 2004; all rights reserved.

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