Gonotrophic Cycle and Survivorship of Culex Quinquefasciatus (Diptera: Culicidae) Using Sticky Ovitraps in Monterrey, Northeastern Mexico

Elizondo-Quiroga, Armando; Flores, Adriana E.; Elizondo-Quiroga, Darwin; Ponce‐García, Gustavo; Blitvich, Bradley J.; Contreras-Cordero, Juan Francisco; González-Rojas, José I.; Mercado-Hernández, Roberto; Beaty, Barry J.; Fernández‐Salas, Ildefonso

doi:10.2987/8756-971x(2006)22[10:gcasoc]2.0.co;2

Cited by 25 publications

(18 citation statements)

References 11 publications

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“…Meteorological data were recorded at the nearest meteorological station from Davidson 7 method: S = g √ parity rate, where S was the survival rate and g was the duration of the gonotrophic cycle, which was assumed to be three days. 9,15 Mosquito longevity was calculated as 1/-log e S, and the proportion of females that survived eight days was defi ned as S. 6 Eight was the probable duration of the extrinsic incubation period for the WNV virus. 12 We performed parity, survival and longevity analysis on a monthly basis due to the limitations of weekly female collections.…”

Section: Methodsmentioning

confidence: 99%

Bionomics of Culex quinquefasciatus within urban areas of Rio de Janeiro, Southeastern Brazil

2012

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Bionomia de Culex quinquefasciatus em áreas urbanas no Rio de Janeiro, RJ ABSTRACT OBJECTIVE: To evaluate density, parity rates, daily survival and longevity of natural populations of Culex quinquefasciatus in three neighborhoods with distinct socio-economic and infrastructure profi les. METHODS:Mosquito collections of the Culex quinquefasciatus species were performed weekly during two four month periods, from August to November 2008 (spring) and March to June 2009 (fall), in a favela (slum), a suburban area and a middle class area of Rio de Janeiro, Southeastern Brazil. Collections were performed with backpack aspirators, in 20 randomly selected houses in each area per week, during 15-20 minutes per house. Ovaries were removed from captured females and classifi ed as initial, intermediary or fi nal stage. Furthermore, females were dissected for determination of parity based on the condition of the tracheal system. Mosquito survival rate and longevity were estimated on a per month basis for each neighborhood. RESULTS:We collected a total of 2,062 Culex quinquefasciatus, but monthly vector density was not correlated with temperature and rainfall. We dissected the ovaries of 625 Culex quinquefasciatus, and overall, there was a higher proportion of nulliparous females during the dryer months, while gravid females were more frequent in rainy months. In the middle class neighborhood, the parity rate reached up to 93.75% with survivorship of 0.979. Lower parity and survival rates were obtained in the suburban area (as low as 36.4% parity and 0.711 daily survival). Up to 84.7% of Culex quinquefasciatus females could survive the eight day period needed to complete West Nile Virus incubation. CONCLUSIONS:The survival rate of Culex quinquefasciatus varied signifi cantly between the neighborhoods. This suggests that vectorial capacity and disease transmission risk may vary greatly between different urban areas, which is potentially useful information for vector control programs. DESCRIPTORS:Culex. Parity. Survival. Longevity. 851Rev Saúde Pública 2012;46(5): Culex quinquefasciatus Say is a cosmopolitan mosquito with worldwide distribution, more frequent in tropical and subtropical areas in association with human dwellings. The adult females lay eggs preferentially in relatively large, permanent habitats with high concentrations of decomposing organic matter, such as sewage effl uents and septic tanks. However, immature stages of this species can be found in artifi cial containers often fi lled with polluted or organic-rich water, but rarely co-exist in the same container with the dengue vector Aedes aegypti.

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Section: Methodsmentioning

confidence: 99%

Bionomics of Culex quinquefasciatus within urban areas of Rio de Janeiro, Southeastern Brazil

2012

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“…We used a linear mixed effect model to examine the relationship between clutch size and time to egg laying as a function of treatment with host ID as a random effect. We limited our analyses of reproductive success of mosquitoes (clutch size and day of egg laying) to one week after blood feeding, twice the length of the typical gonotrophic cycle of C. quinquefasciatus [27]; 70% of vectors collected from bird cages laid eggs within this period of time, 18% laid eggs after day 6, and 12% did not lay clutches at all or died before laying eggs. Effects of corticosterone on mosquito survival were assessed over the full 20 day trial.…”

Section: (E) Data Analysesmentioning

confidence: 99%

Host stress hormones alter vector feeding preferences, success, and productivity

et al. 2016

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Stress hormones might represent a key link between individual-level infection outcome, population-level parasite transmission, and zoonotic disease risk. Although the effects of stress on immunity are well known, stress hormones could also affect host-vector interactions via modification of host behaviours or vector-feeding patterns and subsequent reproductive success. Here, we experimentally manipulated songbird stress hormones and examined subsequent feeding preferences, feeding success, and productivity of mosquito vectors in addition to defensive behaviours of hosts. Despite being more defensive, birds with elevated stress hormone concentrations were approximately twice as likely to be fed on by mosquitoes compared to control birds. Moreover, stress hormones altered the relationship between the timing of laying and clutch size in blood-fed mosquitoes. Our results suggest that host stress could affect the transmission dynamics of vector-borne parasites via multiple pathways.

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“…27,59 Furthermore, based on our data and the daily survival rate obtained in earlier studies, the estimated survival of infective life rate ranged from (0.871) 15 and (0.883). 15,63 In other words, only 12.59 to 15.46% of the populations of Culex quinquefasciatus will survive up to Day 15 postinfection, which is the time needed from infection to transmission. Our Cx.…”

Section: Vector Competence Of Culex For West Nile Virus Lineagesmentioning

confidence: 99%

Vector Competence of Culex neavei and Culex quinquefasciatus (Diptera: Culicidae) from Senegal for Lineages 1, 2, Koutango and a Putative New Lineage of West Nile Virus

Fall¹,

Diallo²,

Loucoubar³

et al. 2014

The American Journal of Tropical Medicine and Hygiene

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Abstract. West Nile virus (WN virus) is one of the most widespread arbovirus and exhibits a great genetic diversity with 8 lineages, at least 4 (1, 2, Koutango, and putative new) are present in Africa. In West Africa, Culex neavei and Culex quinquefasciatus are considered as potential vectors for WN virus transmission in sylvatic or urban context. We analyzed the vector competence of these Culex species from Senegal for African lineages and envelope proteins sequences of viral strains used. We showed that lineage 1 is transmitted by both Culex mosquitoes, whereas the putative new lineage 8 is transmitted only by Cx. neavei. Our findings suggest that genetic variability can affect vector competence and depend on mosquito. However, when considering the infective life rate, the mosquito population seems to be inefficient for WN virus transmission in the field and could explain the low impact of WN virus in Africa.

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Gonotrophic Cycle and Survivorship of Culex Quinquefasciatus (Diptera: Culicidae) Using Sticky Ovitraps in Monterrey, Northeastern Mexico

Cited by 25 publications

References 11 publications

Bionomics of Culex quinquefasciatus within urban areas of Rio de Janeiro, Southeastern Brazil

Bionomics of Culex quinquefasciatus within urban areas of Rio de Janeiro, Southeastern Brazil

Host stress hormones alter vector feeding preferences, success, and productivity

Vector Competence of Culex neavei and Culex quinquefasciatus (Diptera: Culicidae) from Senegal for Lineages 1, 2, Koutango and a Putative New Lineage of West Nile Virus

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