Pathways of Expansion and Multiple Introductions Illustrated by Large Genetic Differentiation Among Worldwide Populations of the Southern House Mosquito

Fonseca, Dina M.; Smith, Julie L.; Wilkerson, Richard C.; Fleischer, Robert C.

doi:10.4269/ajtmh.2006.74.284

Cited by 89 publications

(82 citation statements)

References 30 publications

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“…21,51 We simulated seasonal climate variation by testing WNV vector competency at two temperatures, and hypothesized that temperature would influence viral transmission in Galápagos Cx. quinquefasciatus .…”

Section: Discussionmentioning

confidence: 99%

West Nile Virus Vector Competency of Culex quinquefasciatus Mosquitoes in the Galápagos Islands

Eastwood

Kramer²,

Goodman³

et al. 2011

The American Society of Tropical Medicine and Hygiene

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Abstract. The mosquito-transmitted pathogen West Nile virus (WNV) is not yet present in the Galápagos Archipelago of Ecuador. However, concern exists for fragile endemic island fauna after population decreases in several North American bird species and pathology in certain reptiles. We examined WNV vector competency of a Galápagos strain of mosquito ( Culex quinquefasciatus Say). Field specimens were tested for their capacity to transmit the WN02-1956 strain of WNV after incubation at 27°C or 30°C. Rates of infection, dissemination, and transmission all increased with days post-exposure to WNV, and the highest rates were observed at 28 days. Infection rates peaked at 59% and transmission rates peaked at 44% (of mosquitoes tested). Vector efficiency increased after day 14. Rates of infection but not of transmission were significantly influence by temperature. No vertical transmission was detectable. We demonstrate that Galápagos Cx. quinquefasciatus are competent WNV vectors, and therefore should be considered an animal and public health risk for the islands and controlled wherever possible.

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Section: Discussionmentioning

confidence: 99%

West Nile Virus Vector Competency of Culex quinquefasciatus Mosquitoes in the Galápagos Islands

Eastwood

Kramer²,

Goodman³

et al. 2011

The American Society of Tropical Medicine and Hygiene

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“…5 Culex quinquefasciatus (the southern house mosquito) and Cx. pipiens (the northern house mosquito) have been widely distributed across the world by humans, 6,7 with whom they are closely associated. In overlapping areas, the species have hybridized extensively.…”

Section: Introductionmentioning

confidence: 99%

Autogeny in Culex pipiens Complex Mosquitoes from the San Francisco Bay Area

Strickman¹,

Fonseca²

2012

The American Society of Tropical Medicine and Hygiene

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Abstract. We surveyed the genetic ancestry and recorded the occurrence of autogeny, the developmental times, and survival rates in families of Culex pipiens in Santa Clara County, CA, at 37 N latitude. Females in 95% of the families produced fertile egg rafts without access to blood (= autogeny) after mating in stenogamous conditions. Developmental time, survival, and egg raft production were closely correlated to temperature. Male DV/D ratios overwhelmingly matched Cx. pipiens but a microsatellite analysis revealed these were Cx. pipiens form molestus hybridized with Culex quinquefasciatus and to a lesser extent to Cx. pipiens form pipiens, a genetic mix heretofore not recorded elsewhere. Greater DV/D ratios and larger proportions of genetic ancestry from Cx. quinquefasciatus were negatively correlated to autogeny. The combination of multiple overwintering strategies and widespread autogeny in females arising from aboveground larval sites supports the hypothesis that some North American populations of Cx. pipiens complex mosquitoes express unusual phenologies.

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“…Although Culex quinquefasciatus Say (Diptera: Culicidae) is a vector of human pathogens, including agents for filariasis and several arboviruses, its epidemiological importance varies considerably among regions 14 . In equatorial-tropical regions, the species is reported as the primary vector of Wuchereria bancrofti in the transmission cycle of lymphatic filariasis 36 .…”

Section: Introductionmentioning

confidence: 99%

Low genetic diversity in Wolbachia-Infected Culex quinquefasciatus (Diptera: Culicidae) from Brazil and Argentina

Morais

Almeida

Suesdek

et al. 2012

Rev. Inst. Med. trop. S. Paulo

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SUMMARYCulex quinquefasciatus is a vector of human pathogens, including filarial nematodes and several viruses. Although its epidemiological relevance is known to vary across geographical regions, an understanding of its population genetic structure is still incipient. In light of this, we evaluated the genetic diversity of Cx. quinquefasciatus and Cx. pipiens x Cx. quinquefasciatus hybrids collected from nine localities in Brazil and one site in Argentina. We used mitochondrial genes cox1 and nd4, along with the coxA and wsp genes of the maternally-inherited Wolbachia endosymbiont. The nd4 fragment was invariant between samples, whilst cox1 exhibited four haplotypes that separated two types of Cx. quinquefasciatus, one clustered in southern Brazil. Low sequence diversity was generally observed, being discussed. Both Brazilian and Argentinian mosquitoes were infected with a single Wolbachia strain. As reported in previous studies with these populations, cox1 and nd4 diversity is not congruent with the population structure revealed by nuclear markers or alar morphology. Future Cx. quinquefasciatus research should, if possible, evaluate mtDNA diversity in light of other markers.

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Pathways of Expansion and Multiple Introductions Illustrated by Large Genetic Differentiation Among Worldwide Populations of the Southern House Mosquito

Cited by 89 publications

References 30 publications

West Nile Virus Vector Competency of Culex quinquefasciatus Mosquitoes in the Galápagos Islands

West Nile Virus Vector Competency of Culex quinquefasciatus Mosquitoes in the Galápagos Islands

Autogeny in Culex pipiens Complex Mosquitoes from the San Francisco Bay Area

Low genetic diversity in Wolbachia-Infected Culex quinquefasciatus (Diptera: Culicidae) from Brazil and Argentina

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