Evaluation of two counterflow traps for testing behaviour-mediating compounds for the malaria vector Anopheles gambiae s.s. under semi-field conditions in Tanzania

Autor: Bart G. J. Knols, Renate C. Smallegange, Gerry F. Killeen, Wolfgang H Schmied, Willem Takken
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Veterinary medicine
lcsh:Arctic medicine. Tropical medicine
Mosquito Control
lcsh:RC955-962
Anopheles gambiae
030231 tropical medicine
field-evaluation
western kenya
insect repellents
carbon-dioxide
Tanzania
mm-x traps
030308 mycology & parasitology
lcsh:Infectious and parasitic diseases
human landing catch
Discriminatory power
03 medical and health sciences
0302 clinical medicine
Anopheles gambiae S
light trap
Anopheles
Animals
Humans
lcsh:RC109-216
Laboratory of Entomology
Malaria vector
essential oils
bg-sentinel
0303 health sciences
biology
Behavior
Animal
Chemotactic Factors
Research
Trap (plumbing)
Carbon Dioxide
biology.organism_classification
PE&RC
Laboratorium voor Entomologie
Vector control
3. Good health
Mosquito control
Infectious Diseases
adult aedes-aegypti
Odorants
Female
Parasitology
Foot (unit)
Field conditions
Zdroj: Malaria Journal, 7
Malaria Journal
Malaria Journal, Vol 7, Iss 1, p 230 (2008)
Malaria Journal 7 (2008)
ISSN: 1475-2875
Popis: Background Evaluation of mosquito responses towards different trap-bait combinations in field trials is a time-consuming process that can be shortened by experiments in contained semi-field systems. Possible use of the BG Sentinel (BGS) trap to sample Anopheles gambiae s.s. was evaluated. The efficiency of this trap was compared with that of the Mosquito Magnet-X (MM-X) trap, when baited with foot odour alone or combinations of foot odour with carbon dioxide (CO2) or lemongrass as behaviour-modifying cues. Methods Female An. gambiae s.s. were released in an experimental flight arena that was placed in a semi-field system and left overnight. Catch rates for the MM-X and BGS traps were recorded. Data were analysed by fitting a generalized linear model to the (n+1) transformed catches. Results Both types of traps successfully captured mosquitoes with all odour cues used. When the BGS trap was tested against the MM-X trap in a choice assay with foot odour as bait, the BGS trap caught about three times as many mosquitoes as the MM-X trap (P = 0.002). Adding CO2 (500 ml/min) to foot odour increased the number of mosquitoes caught by 268% for the MM-X (P < 0.001) and 34% (P = 0.051) for the BGS trap, compared to foot odour alone. When lemongrass leaves were added to foot odour, mosquito catches were reduced by 39% (BGS, P < 0.001) and 38% (MM-X, P = 0.353), respectively. Conclusion The BGS trap shows high potential for field trials due to its simple construction and high catch rate when baited with human foot odour only. However, for rapid screening of different baits in a contained semi-field system, the superior discriminatory power of the MM-X trap is advantageous.
Databáze: OpenAIRE
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