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AuthorJuliano, Steven A.
AuthorRibeiro, Gabriel Sylvestre
AuthorFreitas, Rafael Maciel de
AuthorCastro, Márcia G.
AuthorCodeço, Claudia
AuthorOliveira, Ricardo Lourenço de
AuthorLounibos, L. Philip
Access date2015-09-21T17:25:31Z
Available date2015-09-21T17:25:31Z
Document date2014
CitationJULIANO, Steven A.; She’s a femme fatale: low-density larval development produces good disease vectors. Mem Inst Oswaldo Cruz, v.109, n.8, p.1070-1077, Dec. 2014.pt_BR
ISSN1678-8060pt_BR
ISSN10.1590/0074-02760140455pt_BR
URIhttps://www.arca.fiocruz.br/handle/icict/11727
Languageengpt_BR
PublisherFundação Oswaldo Cruzpt_BR
Rightsopen access
Subject in PortugueseRio de Janeiropt_BR
TitleShe’s a femme fatale: low-density larval development produces good disease vectorspt_BR
TypeArticle
AbstractTwo hypotheses for how conditions for larval mosquitoes affect vectorial capacity make opposite predictions about the relationship of adult size and frequency of infection with vector-borne pathogens. Competition among larvae produces small adult females. The competition-susceptibility hypothesis postulates that small females are more susceptible to infection and predicts frequency of infection should decrease with size. The competition-longevity hypothesis postulates that small females have lower longevity and lower probability of becoming competent to transmit the pathogen and thus predicts frequency of infection should increase with size. We tested these hypotheses for Aedes aegypti in Rio de Janeiro, Brazil, during a dengue outbreak. In the laboratory, longevity increases with size, then decreases at the largest sizes. For field-collected females, generalised linear mixed model comparisons showed that a model with a linear increase of frequency of dengue with size produced the best Akaike’s information criterion with a correction for small sample sizes (AICc). Consensus prediction of three competing models indicated that frequency of infection increases monotonically with female size, consistent with the competition-longevity hypothesis. Site frequency of infection was not significantly related to site mean size of females. Thus, our data indicate that uncrowded, low competition conditions for larvae produce the females that are most likely to be important vectors of dengue. More generally, ecological conditions, particularly crowding and intraspecific competition among larvae, are likely to affect vector-borne pathogen transmission in nature, in this case via effects on longevity of resulting adults. Heterogeneity among individual vectors in likelihood of infection is a generally important outcome of ecological conditions impacting vectors as larvae.pt_BR
AffilliationIllinois State University. School of Biological Science. Normal, IL, USA.pt_BR
AffilliationFundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro, RJ, Brasil.pt_BR
AffilliationFundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro, RJ, Brasil.pt_BR
AffilliationFundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro, RJ, Brasil.pt_BR
AffilliationPrograma de Computação Científica-Fiocruz. Rio de Janeiro, RJ, Brasil.pt_BR
AffilliationFundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro, RJ, Brasil.pt_BR
AffilliationUniversity of Florida. Florida Medical Entomology Laboratory. Gainesville, FL, USA.pt_BR
SubjectDenguept_BR
SubjectAedes Aegyptipt_BR
SubjectCompetitionpt_BR
SubjectAdult sizept_BR
SubjectLongevitypt_BR
SubjectTrans-stadial effectspt_BR
DeCSAedespt_BR
DeCSDenguept_BR
DeCSPatógenos Transmitidos pelo Sanguept_BR
DeCSLongevidadept_BR


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