Species Composition of Mosquitoes from Boarding School Dormitories in Benin City, Edo State, Nigeria

Abstract

<jats:p>This study investigated the distribution, species composition, and sex ratio of indoor resting mosquitoes alongside their relationship with climatic conditions in school dormitories located in Egor, Oredo and Ikpoba-okha Local Government Areas (LGAs) respectively in Benin City, Edo State, Nigeria. Indoor resting mosquitoes were collected with the aid of a sweep net and mechanical aspirator from randomly selected school dormitories between 08.00hr and 11.00hr from November (2011) to June (2012). The mosquitoes collected were identified using published morphological identification keys. A total of 766 mosquitoes containing four species: Culex quinquefasciatus (n=724; 94.5%), Anopheles gambiaes.l. (n=37; 4.8%), Culexannulioris (n=4; 0.5%) and Anopheles funestus (n=1; 0.1%) in descending order of importance, were collected. Cx.quinquefasciatus was the most predominant mosquito species in school dormitories across the three LGAs. Cx. annulioris and An. gambiaes.l were most abundant in school dormitories located in Oredo and Ikpoba-okha LGAs respectively. An.funestus occurred only in school dormitories located in Oredo LGA. Analysis of the relationship between meteorological data and species abundance varied significantly (P&lt;0.05) only among An. gambiaes.l with rainfall. There was significant difference (P&lt;0.05) in the sex ratio for all species obtained from the various locations except An. gambiae and Cx. annulioris in dormitories located in Oredo LGA Results of this study revealed the high presence of mosquito-borne disease risk within the school dormitories and environ, and therefore, the urgent need for properly planned, executed and regular evaluation of control measures.</jats:p>

Gonotrophic stages of Anopheles gambiae and Culex quinquefasciatus and their relationships with climatic conditions in selected school dormitories in Benin City, Nigeria

“…The study was conducted in Egor, Oredo and Ikpoba- LGAs respectively which have been extensively described by Omoregie et al (2019) and Omoregie and Aigbodion (2022).…”

“…Resting adult mosquitoes were sampled from 08:00 -11:00 hours in five dormitories randomly selected from each of the Local Government Areas bimonthly from January to June 2012. Techniques used for the adult mosquito collection and handling in the laboratory were also reported by Omoregie et al (2019) and Omoregie and Aigbodion (2022). Mosquitoes brought from the field in specimen bottles were first anaesthetized or killed before identification.…”

“…Weather data on mean relative humidity (%), monthly mean temperature (%) and total rainfall (mm) for the period of study was collected from the Nigeria Meteorological Agency (NIMET) Benin Office at the Benin Airport, Benin City. The data have been reported elsewhere (Omoregie et al, 2019). Data collected were analysed using the Statistical Package for Social Scientists (SPSS 16.0) and Microsoft Excel, 2010 packages.…”

“…Furthermore, there is no comprehensive data on gonotrophic status of mosquito vector species in boarding school dormitories and also on their relationships with weather conditions in Benin City, Edo State. Although, Omoregie and Aigbodion (2022) reported total count of freshly fed and unfed gonotrophic stages of Anopheles gambiae and Culex quinquefasciatus, records of their monthly average percentage abundance and of other stages were absent. This study therefore evaluated the abundance (mean monthly and total) of the gonotrophic stages such as unfed (uf), freshly fed (ff), half gravid (hg) and gravid (g) of An.…”

Commentary: Cautionary Tales and Culture History in the Evolution of the Benin Kingdom: The Ogiso Era

“…Compiling these stories he reconstructed the Ogiso period of Benin history. One historian, Uyilaiva [20,21], writes that "ororegie's tenacity in researching an documenting this period filled a major hiatus in Jacob Egharevba's works" (2016:147) [22].…”