Dispersal of Aedes aegypti and Aedes albopictus (Diptera: Culicidae) in an urban endemic dengue area in the State of Rio de Janeiro, Brazil.
Experimental releases of female Aedes (Stegomyia) aegypti and Aedes (Stegomyia) albopictus were performed in August and September 1999, in an urban area of Nova Igua u, State of Rio de Janeiro, Brazil, to estimate their flight range in a circular area of 1,600 m where 1,472 ovitraps were set. Releases of 3,055 Ae. aegypti and 2,225 Ae. albopictus females, fed with rubidium (Rb)-marked blood and surgically prevented from subsequent blood-feeding, were separated by 11 days. Rb was detected in ovitrap-collected eggs by atomic emission spectrophotometry. Rb-marked eggs of both species were detected up to 800 m from the release point. Eggs of Ae. albopictus were more numerous and more heterogeneously distributed in the area than those of Ae. aegypti. Eggs positively marked for Rb were found at all borders of the study area, suggesting that egg laying also occurred beyond these limits. Results from this study suggest that females can fly at least 800 m in 6 days and, if infected, potentially spread virus rapidly.
Honório
Nildimar Alves
NA
Laboratório de Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ, Brasil. honorio@ioc.fiocruz.br
Silva
Wellington da Costa
Wda C
Leite
Paulo José
PJ
Gonçalves
Jaylei Monteiro
JM
Lounibos
Leon Philip
LP
Lourenço-de-Oliveira
Ricardo
R
D000330:Aedes / Q000502:physiology*; D000823:Animal Identification Systems / Q000379:methods; D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D001938:Brazil; D002712:Chlorides / Q000032:analysis; D005247:Feeding Behavior; D005260:Female; D005426:Flight, Animal; D007303:Insect Vectors / Q000502:physiology*; D010063:Ovum / Q000737:chemistry; D011157:Population Dynamics; D012413:Rubidium / Q000032:analysis; D013054:Spectrophotometry, Atomic
D002712:Chlorides; D012413:Rubidium; C032710:rubidium chloride