The Abundance and Biting Patterns of <i>Culex quinquefasciatus</i> Say (Culicidae) in the Coastal Region of Nigeria

Uttah, Emmanuel Chukwunenye; Wokem, G. N.; Okonofua, Christiana

doi:10.1155/2013/640691

Cited by 26 publications

(15 citation statements)

References 30 publications

(34 reference statements)

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“…This may be due to the effect of excess rainfalls resulting into flooding that could wash off mosquito larval habitats before their complete development, thereby having a negative effect on local mosquito populations ( Epstein, 2004 ). A similar finding was reported in the study of Uttah et al (2013) in Imo state, Nigeria, where a decline in mosquito abundance was found in the months with the highest rainfall during the first year of their study. However, the highest abundance of mosquito was recorded during the month with highest rainfall in the second year of their study.…”

Section: Discussionsupporting

confidence: 89%

Influence of Meteorological Variables on Diversity and Abundance of Mosquito Vectors in Two Livestock Farms in Ibadan, Nigeria: Public Health Implications

Opayele

Adekunle

Tahiru

et al. 2017

jmr

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This study was undertaken to determine mosquito vector diversity and abundance in two livestock farms with previous history of arboviral activities in Ibadan, southwestern Nigeria. The influence of weather on mosquito populations was also studied. Adult mosquitoes were collected weekly in two proximate University of Ibadan livestock farms from March 2015 to February 2016 using CO2 baited CDC light trap and human landing collection methods. Mosquitoes were identified to species using morphological keys. Relationships and interaction of temperature, relative humidity, rainfall patterns and mosquito abundance were analysed using GENSTAT 4th edition. Among 6,195 adult mosquitoes collected, 16 species belonging to 5 genera were morphologically identified. Culex quinquefasciatus constituted the most abundant mosquito, representing 46.49% of all mosquitoes encountered. High abundance in mosquito population was noted in periods succeeding months with heavy rainfall, this is when arbovirus transmission risk is highest. A positive correlation was observed between relative humidity and abundance of Mansonia mosquitoes. This study shows the effect of weather on natural populations of mosquito vectors. The diverse mosquito species capable of transmitting arboviruses from animal reservoirs to human and animals in livestock farms and its environment in Ibadan, Nigeria was also revealed. There is need for intensive vector control strategies targeted at reducing mosquito populations and ultimately prevention of disease outbreaks.

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Section: Discussionsupporting

confidence: 89%

Influence of Meteorological Variables on Diversity and Abundance of Mosquito Vectors in Two Livestock Farms in Ibadan, Nigeria: Public Health Implications

Opayele

Adekunle

Tahiru

et al. 2017

jmr

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“…albopictus are day-time and aggressive outdoor feeders, and Cx. quinquefasciatus is both a day-time and out-door feeder (Chadee & Corbet, 1993;Liu et al, 2011;Antonio-Nkondjio et al, 2012;Bonizzoni et al, 2012;Uttah et al, 2013;Andersson et al, 2015). The differential blood feeding behavior may have influenced gene expansion in each group (Chen et al, 2015).…”

Section: Identification and Classification Of Putative Obps In An Simentioning

confidence: 99%

Genome-wide identification and characterization of odorant-binding protein (OBP) genes in the malaria vectorAnopheles sinensis(Diptera: Culicidae)

Zhang

et al. 2016

Insect Science

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Anopheles sinensis is a major malaria vector. Insect odorant-binding proteins (OBPs) may function in the reception of odorants in the olfactory system. The classification and characterization of the An. sinensis OBP genes have not been systematically studied. In this study, 64 putative OBP genes were identified at the whole-genome level of An. sinensis based on the comparison between OBP conserved motifs, PBP_GOBP, and phylogenetic analysis with An. gambiae OBPs. The characterization of An. sinensis OBPs, including the motif's conservation, gene structure, genomic organization and classification, were investigated. A new gene, AsOBP73, belonging to the Plus-C subfamily, was identified with the support of transcript and conservative motifs. These An. sinensis OBP genes were classified into three subfamilies with 37, 15 and 12 genes in the subfamily Classic, Atypical and Plus-C, respectively. The genomic organization of An. sinensis OBPs suggests a clustered distribution across nine different scaffolds. Eight genes (OBP23-28, OBP63-64) might originate from a single gene through a series of historic duplication events at least before divergence of Anopheles, Culex and Aedes. The microsynteny analyses indicate a very high synteny between An. sinensis and An. gambiae OBPs. OBP70 and OBP71 earlier classified under Plus-C in An. gambiae are recognized as belonging to the group Obp59a of the Classic subfamily, and OBP69 earlier classified under Plus-C has been moved to the Atypical subfamily in this study. The study established a basic information frame for further study of the OBP genes in insects as well as in An. sinensis.

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“…Malaria vector species exhibit diverse feeding behaviours: some feed predominantly indoors and late at night while others bite mostly outdoors in the evening and early morning [ 3 – 12 ]. While behaviour characterization of Culex spp, especially the abundant populations of Culex quinquefasciatus that proliferate and transmit lymphatic filariasis in urban settings [ 13 , 14 ], is rarely documented, this mosquito species may also exhibit diverse biting behaviour [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

An improved mosquito electrocuting trap that safely reproduces epidemiologically relevant metrics of mosquito human-feeding behaviours as determined by human landing catch

Govella¹,

Maliti²,

Mlwale³

et al. 2016

Malar J

106

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BackgroundReliable quantification of mosquito host—seeking behaviours is required to determine the efficacy of vector control methods. For malaria, the gold standard approach remains the risky human landing catch (HLC). Here compare the performance of an improved prototype of the mosquito electrocuting grid trap (MET) as a safer alternative with HLC for measuring malaria vector behaviour in Dar es Salaam, Tanzania.MethodsMosquito trapping was conducted at three sites within Dar es Salaam representing a range of urbanicity over a 7-month period (December 2012–July 2013, 168 sampling nights). At each site, sampling was conducted in a block of four houses, with two houses being allocated to HLC and the other to MET on each night of study. Sampling was conducted both indoors and outdoors (from 19:00 to 06:00 each night) at all houses, with trapping method (HLC and MET) being exchanged between pairs of houses at each site using a crossover design.ResultsThe MET caught significantly more Anopheles gambiae sensu lato than the HLC, both indoors (RR [95 % confidence interval (CI)]) = 1.47 [1.23–1.76], P < 0.0001 and outdoors = 1.38 [1.14–1.67], P < 0.0001). The sensitivity of MET compared with HLC did not detectably change over the course of night for either An. gambiae s.l. (OR [CI]) = 1.01 [0.94–1.02], P = 0.27) or Culex spp. (OR [CI]) = 0.99 [0.99–1.0], P = 0.17) indoors and declined only slightly outdoors: An. gambiae s.l. (OR [CI]) = 0.92 [0.86–0.99], P = 0.04), and Culex spp. (OR [CI]) = 0.99 [0.98–0.99], P = 0.03). MET-based estimates of the proportions of mosquitoes caught indoors (Pi) or during sleeping hours (Pfl), as well as the proportion of human exposure to bites that would otherwise occurs indoors (πi), were statistically indistinguishable from those based on HLC for An. gambiae s.l. (P = 0.43, 0.07 and 0.48, respectively) and Culex spp. (P = 0.76, 0.24 and 0.55, respectively).ConclusionsThis improved MET prototype is highly sensitive tool that accurately quantifies epidemiologically-relevant metrics of mosquito biting densities, behaviours and human exposure distribution.Electronic supplementary materialThe online version of this article (doi:10.1186/s12936-016-1513-1) contains supplementary material, which is available to authorized users.

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The Abundance and Biting Patterns of Culex quinquefasciatus Say (Culicidae) in the Coastal Region of Nigeria

Cited by 26 publications

References 30 publications

Influence of Meteorological Variables on Diversity and Abundance of Mosquito Vectors in Two Livestock Farms in Ibadan, Nigeria: Public Health Implications

Influence of Meteorological Variables on Diversity and Abundance of Mosquito Vectors in Two Livestock Farms in Ibadan, Nigeria: Public Health Implications

Genome-wide identification and characterization of odorant-binding protein (OBP) genes in the malaria vectorAnopheles sinensis(Diptera: Culicidae)

An improved mosquito electrocuting trap that safely reproduces epidemiologically relevant metrics of mosquito human-feeding behaviours as determined by human landing catch

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