Temporal Distribution of and Habitat Diversification by Some Mosquitoes (Diptera: Culicidae) Species in Benin City, Nigeria

Aigbodion, F. I.; Uyi, Osariyekemwen

doi:10.3923/je.2013.13.23

Cited by 19 publications

(10 citation statements)

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“…Anopheles gambiae complex has been noted for its role in the transmission of deadly and life-threatening diseases such as malaria, bancroftian filariasis and few viruses (Adeleke et al, 2013;Aigbodion and Osariyekemken, 2013). This group of Anopheles mosquitoes had 2008).…”

Section: Introductionmentioning

confidence: 99%

Molecular Characterization and Insecticide Susceptibility Status of Anopheles gambiae Complex (Giles, 1902) in Osun State, Southwestern Nigeria

Adeleke¹,

Adeyemi²,

Fasasi³

et al. 2018

NJE

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A major challenge facing malaria control today is the high spate of insecticide resistance in mosquito populations. The present study was designed to investigate the susceptibility of An. gambiaes.l. to Dichlorodiphenyltrichloroethane (DDT) and Deltamethrin, and determine the sibling species at selected locations in Osun State, Nigeria. Larvae of An. gambiae complex were collected from Ibokun, Ife, Ede, Osogbo, Okuku and Iwo representing the three geopolitical zones in Osun State. Two to three day old unfed female mosquitoes were subjected to bioassays using papers impregnated with 0.05% Deltametrin (pyrethroid) and 4% DDT (organochlorine) in accordance with WHO protocols. Knock down was recorded every 10 minutes for one hour and mortality measured after 24 hours. The mosquitoes were then identified using morphological keys and Polymerase Chain Reaction (PCR) assay. The results of the knockdown effects of the insecticides ranged from 40-70% in mosquitoes exposed for Deltamethrin and 15-45% for DDT across all locations. The post-exposure mortality caused by the two insecticides varied significantly; and mortality recorded in mosquitoes exposed to Deltamethrin was significantly higher than DDT (p<0.05) in all the study locations. All the mosquitoes exposed were highly resistant to DDT across all locations (0%-66.7% mortality). However, mosquitoes from Ede were susceptible to deltamethrin (100% mortality), and those from Ife and Osogbo were suspected to be resistant to deltamethrin with 95% and 90% mortalities respectively while the Anopheles mosquitoes from Okuku and Ibokun were resistant to the insecticide (with 79% and 75.6% mortalities respectively). Molecular identification showed that An. gambiae s.s was the only species found across all localities except for Osogbo and Ibokun where An. Arabiensis and An. gambiae s.s were detected. The high resistance of the mosquito populations to DDT and the suspected resistance to Deltametrin indicate that DDT may not be suitable for vector control activities in Osun State while close monitoring of deltamethrin resistance is required to inform vector control interventions in the state.

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Section: Introductionmentioning

confidence: 99%

Molecular Characterization and Insecticide Susceptibility Status of Anopheles gambiae Complex (Giles, 1902) in Osun State, Southwestern Nigeria

Adeleke¹,

Adeyemi²,

Fasasi³

et al. 2018

NJE

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“…gambiae and An. funestus complexes together comprised 14.4% of the total species recorded in Benin City Nigeria (Aigbodion et al, 2013), they form 65.2% and 17.3% respectively of most commonly reported malaria vectors in Nigeria (Okorie et al, 2011). Earlier study in other African highlands had reported these two species as the predominant anophelines (Bødker et al, 2003).…”

Section: Discussionmentioning

confidence: 95%

“…Earlier study in other African highlands had reported these two species as the predominant anophelines (Bødker et al, 2003). This has serious health implications as the two species have been identified as important malaria and lymphatic filariasis vectors in Nigeria (Aigbodion et al, 2013) particularly so that Nigeria is one of the countries with high percentage of malaria prevalence in Sub-Saharan Africa (WHO, 2015 and). An.…”

Section: Discussionmentioning

confidence: 99%

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Molecular characterization and species composition of anopheline vectors of malaria along an altitudinal gradient on the highlands of Mambilla Plateau Northeast, Nigeria

Columbus¹,

A²,

Owino³

et al. 2020

afjbs

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Diversity of species arises majorly from speciation and this has serious epidemiological implications to disease transmission. The study aimed to determine the species of anopheline vectors of malaria present in five locations along with different altitudes on the highlands of Mambilla Plateau Nigeria. These are; Nguroje (1,885 m), Yelwa (1,674 m), Gembu (1,584 m), Kakara (1,496 m) and Mayo-selbe (484 m) above sea level. Samples were collected by Center for Disease Control (CDC) light trap, Pyrethrum Spray Catches (PSC) and others were reared from larvae. A total of 878 female anopheline mosquitoes comprising of five species namely; Anopheles gambiae sl 757(86.22%), Anopheles coustani 73(8.31%), Anopheles funestus 29(3.30%), Anopheles pharoensis 18(2.05%) and Anopheles rufipes 1(0.11%). Mayo-selbe had the highest species abundance of 572 but lowest species diversity index of 0.24 An. gambiae dominated over other anopheline species 0.76. Yelwa had the least abundance but very high diversity index of 0.81 dominance was 0.41. Out of the 757 An. gambiae tested by Polymerase Chain Reaction (PCR), 712(94.06%) were An. gambiae s.s., 192(25.37%) were M form and 520(68.69%) were S form. There was a very strong positive correlation between the M and S forms. As the M forms increase along the locations so also the S forms, r 2 = 0.94204.

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“…pipiens quinquefasciatus; a major biting nuisance especially in urban areas and vectors of several arboviral infections and filariasis. The presence of Culex species has been reported indifferent parts of Nigeria [3,14,17,18]. Temperature, conductivity and pH of Cx.…”

Section: Discussionmentioning

confidence: 99%

Molecular Identification and Insecticide Resistance Status of Culex mosquitoes collected from blocked drainages in Lagos State, Nigeria

Agbor

Idowu

Fagbohun

et al. 2020

PAJOLS

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Background: Culex mosquitoes are important vectors of several human pathogens causing infections such as lymphatic filariasis and several viruses. Poor and blocked drainage system can lead to impediment in water flow, leading to the artificial creation of larval habitats for Culex mosquitoes. Culex mosquitoes has the ability to breed in organically polluted water bodies and exhibit high resistance to insecticides. Therefore, this study assessed the species and insecticides susceptibility status of Culex breeding in blocked drainages in Lagos State. Methods: Culex mosquito larvae were collected from blocked drainages in three Local Government Areas (LGAs) of Lagos State, Nigeria, using standard WHO technique. The physicochemical parameters of the larval habitats were also recorded. Collected mosquito larvae were raised to adult, 2-3 days old. Glucose fed adults female mosquitoes were exposed to permethrin (0.75%) and DDT (4.0%) WHO insecticide test papers. Morphological identification was carried out using standard keys and molecular identification of Culex pipiens sub-species and kdr genotyping was carried out using PCR Results: High level of resistance was recorded with mortality r ate after 24 hour s for DDT ranging from 20% to 32% while permethrin ranges from 14% to 36%. The pH of the all the Culex mosquito larva habitats ranges from 7.38±0.11 to 7.62±0.29, while TDS ranges from 592.6±79.1 to 655±68.1. A total of 1113 Culex pipiens mosquitoes that were identify morphologically, some were selected for molecular identification using PCR assays, out of which 96.2% were identified as Culex p. quinquefasciatus while 3.7% were unidentified. Knockdown mutation (L1014F) was not detected in DDT and pyrethroids resistant Cx. quinquefasciatus in this study. Conclusion: Unplanned ur banization, inadequate w ater su pply and inefficient solid w aste and sewage management practices can result in the creation artificial larval habitats for Culex mosquitoes leading to potential outbreak of Culex mosquito borne diseases. The resistance to DDT and permethrin insecticides in Cx. quinquefasciatus in Lagos State may represent a threat towards the efficacy of ITNs and other forms of vector control such as indoor residual spraying in the future.

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Temporal Distribution of and Habitat Diversification by Some Mosquitoes (Diptera: Culicidae) Species in Benin City, Nigeria

Cited by 19 publications

References 10 publications

Molecular Characterization and Insecticide Susceptibility Status of Anopheles gambiae Complex (Giles, 1902) in Osun State, Southwestern Nigeria

Molecular Characterization and Insecticide Susceptibility Status of Anopheles gambiae Complex (Giles, 1902) in Osun State, Southwestern Nigeria

Molecular characterization and species composition of anopheline vectors of malaria along an altitudinal gradient on the highlands of Mambilla Plateau Northeast, Nigeria

Molecular Identification and Insecticide Resistance Status of Culex mosquitoes collected from blocked drainages in Lagos State, Nigeria

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