Desiccation Resistance Among Subpopulations of Anopheles gambiae s.s. From Selinkenyi, Mali

Certain forms of Anopheles gambiae s.s. actively maintain malaria transmission in the driest areas and months of the year because of considerable drought tolerance. We monitored desiccation resistance of F1 offspring of both the M and S forms of field-collected An. gambiae s.s. Our results indicate...

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Bibliographic Details
Published inJournal of medical entomology Vol. 46; no. 2; pp. 316 - 320
Main Authors Lee, Yoosook, Meneses, Claudio R, Fofana, Abdrahamane, Lanzaro, Gregory C
Format Journal Article
LanguageEnglish
Published England 01.03.2009
Subjects
Animals
Anopheles - genetics
Anopheles - physiology
Anopheles gambiae
Anopheles gambiae sensu stricto
biological resistance
Chromosome Inversion
dehydration (animal physiology)
drought tolerance
Droughts
Female
gender differences
genotype
geographical variation
insect vectors
M molecular forms
malaria
Male
Mali
mortality
Phenotype
population genetics
S molecular forms
Sex Characteristics
Water - physiology
Mali
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Summary:Certain forms of Anopheles gambiae s.s. actively maintain malaria transmission in the driest areas and months of the year because of considerable drought tolerance. We monitored desiccation resistance of F1 offspring of both the M and S forms of field-collected An. gambiae s.s. Our results indicate that the geographic cline in the distribution of the two forms, as observed in Mali, corresponds to a physiological difference in response to arid environments. In addition, female mosquitoes survived significantly longer than males, enhancing the vector competence for the malaria parasite. Our study supports a genetic link to the drought tolerance phenotype, a phenotype with important consequences to malaria transmission in many places in Africa.
Bibliography:http://dx.doi.org/10.1603/033.046.0216
ISSN:0022-2585
1938-2928
DOI:10.1603/033.046.0216