Dynamics of anopheline vector species composition and reported malaria cases during rain and dry seasons in two selected communities of Kwara State

Oduola, A. M. J.; Adelaja, Olukayode James; Aiyegbusi, Z.O.; Tola, Monday; Obembe, A; Ande, A. T.; Awolola, Samson T

doi:10.4314/njpar.v37i2.7

Cited by 17 publications

(24 citation statements)

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“…funestus made up 72% of the total mosquito population against 28% by the Culex species. This is in agreement with the findings of Oduola et al, [30] and Bunza et al, [31] who reported Anopheles species to be more dominant in Kwara and Kastina States. However, Okonkwo et al, [32] reported Culex species to be more dominant in Oba, Idemili South of Anambra State.…”

Section: Discussionsupporting

confidence: 93%

Prevalence, intensity and some vector dynamics of malaria in Ogbaru local government area of Anambara State, Nigeria

Nkeiruka¹,

Ifeoma²,

Simon³

et al. 2020

World J. Adv. Res. Rev.

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A study on the prevalence, intensity and some vector dynamics of malaria was carried out in Ogbaru Local Government Area of Anambra State using standard parasitological and entomological techniques for rapid assessment of malaria infection, level of parasitaemia and morphological features of mosquitoes. The results showed an overall malaria RDT prevalence of 20% and community based prevalence of 13 (16.0%) and 22(24%) for Odekpe and Ogbakuba respectively. In Odekpe, the age range (1-7 years) had the highest prevalence while in Ogbakuba the highest prevalence was the age range 7-14 years. Overall, males had lower malaria prevalence (14.0%) than females (21.0%). The intensity of malaria infection from each of the communities revealed that both high (>2000 - 250000parasites/µl) and medium (>500-2000 parasites/µl) parasitaemia was more in Ogbakuba community. Two hundred and thirty (230) mosquitoes were collected. One hundred and four (45%) of the total mosquito population in the study were found to be unfed with blood meal, whereas 86(37%) and 40(17%) were freshly and previously fed respectively. One hundred and forty two (61.7%) of the mosquitoes appeared gravid against 88(38%) that were non-gravid. The mosquitoes encountered were Anopheles gambiae 76(33.04%), Anopheles funestus 86(37.39%), and Culex specie 68(29.56%). Malaria transmission and possibility of an ongoing transmission of other mosquito-borne diseases among residents in the study area should necessitate design for further studies that would explore the interactions of mosquito species and the diseases they transmit in co- endemic communities as well as effective methods for their control.

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Section: Discussionsupporting

confidence: 93%

Prevalence, intensity and some vector dynamics of malaria in Ogbaru local government area of Anambara State, Nigeria

Nkeiruka¹,

Ifeoma²,

Simon³

et al. 2020

World J. Adv. Res. Rev.

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“…The study was conducted in Kwara State, North Central Nigeria. The State has been classified as derived Savannah, being the transitional zone between the rain forest and arid Sudan Savannah region of Nigeria [ 10 ]. The land area covers about 32,500 km 2 with a population of over two million people [ 11 ] spread across sixteen Local Government Areas.…”

Section: Methodsmentioning

confidence: 99%

Mind the weather: a report on inter-annual variations in entomological data within a rural community under insecticide-treated wall lining installation in Kwara State, Nigeria

et al. 2018

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BackgroundEntomological indices within a specific area vary with climatic factors such as rainfall, temperature and relative humidity. Contributions of such weather parameter fluctuations to the changes in entomological data obtained within a community under implementation of a promising vector control intervention should be taken into account. This study reports on inter-annual changes in entomological indices within two rural communities, one of which was under insecticide-treated durable wall lining (DL) installation.MethodsCommunity-wide DL installation was followed by monthly meteorological data and pyrethrum spray mosquito collections for 2 years in intervention and a similar neighbouring community (control). Human blood meal and sporozoite ELISA tests were conducted on female mosquitoes collected alongside PCR identification of subsamples. Mosquitoes collected at the intervention site were tested in cone susceptibility assays against subsamples of installed DL materials collected on a 6-monthly basis for 2 years. Deltamethrin susceptibility of Anopheles mosquitoes from the intervention site was determined before and after DL installation. Entomological indices in the first and second years were compared within each site.ResultsRainfall in the study area increased significantly (t = -3.45, df = 11, P = 0.005) from first to second year. Correlation between rainfall and Anopheles densities in both sites were significant (r = 0.681, P < 0.001). Mosquitoes collected at the intervention site were susceptible (100%) to deltamethrin at baseline but resistant (92%) in the second year. However, subsamples of installed DL materials remained effective (100% mortality) against Anopheles mosquitoes from the intervention site throughout the 6-monthly cone assay exposures. Monthly pyrethrum spray collections showed significant increase in Anopheles densities from first to second year in the control (6.36 ± 1.61 vs 7.83 ± 2.39; t = -3.47, df = 11, P = 0.005), but not in the intervention (2.83 ± 1.86 vs 4.23 ± 3.31; t = -2.03, df = 11, P = 0.067) community. However, mean annual mosquito man-biting rates increased significantly in both intervention (0.88 ± 0.18 vs 1.06 ± 0.38; F(1, 10) = 9.50, P = 0.012) and control (1.45 ± 0.31 vs 1.61 ± 0.34; F(1, 10) = 10.18, p = 0.010) sites along with increase (≥ 1.6 times) in sporozoite rates within intervention (0–2.13%) and control (2.56–4.04%) communities.ConclusionsThe slight increase in vector density, induced by significant increase in rainfall, led to increased sporozoite infection and significantly increased man-biting rates within the intervention site. These reveal the need for incorporation of integrated vector management strategies to complement DL installation especially in regions with high rainfall and mosquito density. Promising vector control tools such as DL should be evaluated on a long-term basis to reveal the possible effect of weather parameters on control performance and also allow for holistic recommendations.Electronic supplementary materialThe online version o...

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“…Overall age-related malaria prevalence was highest among the age bracket 35 to 42 years (42.9%) followed by those in the age bracket 1-7 years (29.2%). This contradicts finding where children below age 10years had the highest prevalence [20,21,22]. This disparity could be attributed to the increased rate of ITN use among the vulnerable group of which children below the age of 10 years are among.…”

Section: Discussionmentioning

confidence: 80%

Prevalence, intensity and vector dynamics of malaria in Anambra east local government area of Anambra State, Nigeria

Ifeoma¹,

Nkiru²,

Udujih³

et al. 2021

World J. Bio. Pharm. Health Sci.

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The prevalence, intensity and some vector dynamics of malaria in two communities of Anambra East Local Government Area LGA was carried out using standard parasitological and entomological techniques for rapid assessment of malaria infection, level of parasitaemia and morphological features of mosquitoes. Results showed an overall malaria RDT (Rapid Diagnostic Test) prevalence of 22% and community based prevalence of 13 (30%) and 22(24%) for Umuoba -Anam and Nando respectively. Overall, age related prevalence in the Anambra West LGA showed that the age bracket 35 to 42 years had the highest malaria prevalence 3(42.9 %). Overall sex related prevalence in Anambra East LGA showed no statistical significance in prevalence among males (12.0%) and females (10.0%) (P<0.05). The intensity of malaria infection from each of the communities revealed that both low (50-500 parasites/ µl) and medium (>500-2000 parasites/µl) parasitaemia. There was no high parasitaemia recorded in Umuoba-Anam. Overall, a total of 225 mosquitoes were encountered with anopheles making up 61%. A hundred and twenty one (53.8% of the total mosquito population in the study was found to be unfed with blood meal whereas 54(24%) and 50 (22.2%) were freshly and previously fed respectively. One hundred and twenty one (53.8%) of the mosquitoes appeared non-gravid against 82(36.4%) that are gravid. The mosquitoes encountered were Anopheles gambiae 31(13.8%), Anopheles funestus 77(34.22%), and Culex Specie 117(52%). The two communities recorded variations in prevalence, intensity and vector dynamics. There should be intensified effort to continuously educate the masses on all the strategies of malaria prevention.

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Dynamics of anopheline vector species composition and reported malaria cases during rain and dry seasons in two selected communities of Kwara State

Cited by 17 publications

References 0 publications

Prevalence, intensity and some vector dynamics of malaria in Ogbaru local government area of Anambara State, Nigeria

Prevalence, intensity and some vector dynamics of malaria in Ogbaru local government area of Anambara State, Nigeria

Mind the weather: a report on inter-annual variations in entomological data within a rural community under insecticide-treated wall lining installation in Kwara State, Nigeria

Prevalence, intensity and vector dynamics of malaria in Anambra east local government area of Anambra State, Nigeria

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