The bionomics and diversity of freshwater snails species in Yewa North, Ogun State, Southwestern Nigeria

Abstract

Snail control as a form of integrated control for schistosomiasis has been strongly advocated but data on biocontrol using competitor snails are relatively lacking in most endemic areas. Monthly sampling of freshwater snails was conducted in four water bodies in Yewa North Local Government Area, Ogun State, Nigeria. Monthly in situ measurements of the physico-chemical characteristics of surface waters were carried out using field meters. A total number of 13 snail species were recovered from the water bodies. Of these, Bulinus camerunensis was reported for the first time in Nigeria. A significant positive relationship occurred between snail density and dissolved oxygen. Other important relationships were those between Lanistes lybicus and Bulinus senegalensis, Bulinus globosus and Bulinus jousseaumei, and B. senegalensis and Segmentorbis augustus. Snail control using competitor snails should be integrated into schistosomiasis management programmes in endemic areas in order to prevent residual schistosomiasis transmission after control intervention through mass drug treatment.

Maternal urogenital schistosomiasis; monitoring disease morbidity by simple reagent strips

“…It forms part of the epidemiological studies on urogenital schistosomiasis conducted among pregnant women between February 1, 2010 and February 15, 2011 [ 9 ]. As previously described in several studies carried out in the study area, transmission of schistosomiasis is aided by lack of potable water supply and presence of snails intermediate hosts of schistosomes [ 9 , 15 , 29 – 31 ].…”

“…The last decade estimated population of infected pregnant women totalled 10 million [ 10 ]. With increasing reports on Schistosoma infection during pregnancy [ 9 , 11 – 15 ], management of infected pregnant women through treatment with praziquantel in late trimesters has been advocated in order to avert undesirable pregnancy outcomes [ 16 ]. Despite recommendations from WHO, many endemic countries are reluctant to include it because of the side effects [ 10 ].…”

Checklist of the fresh and brackish water snails (Mollusca, Gastropoda) of Bénin and adjacent West African ecoregions

“…Distribution. Coastal countries of West Africa, i.e., Ivory Coast, Ghana, Togo, Bénin, Nigeria, Cameroon, Equatorial Guinea and Gabon (Brown 1994;Diomandé et al 2009;Jørgensen et al 2010a;Salawu and Odaibo 2014;Diakité et al 2017;Danladi et al 2019 Germain, 1907; Lanistes ovum var. major Germain, 1907; Lanistes procerus var.…”

“…Hydrophila was originally spelled as "hygrophiles" (vernacular), subsequently latinized by Herrmannsen (1847Herrmannsen ( [in 1846Herrmannsen ( -1852: 547) and established as a suborder. Later, it was treated by Thiele (1926Thiele ( [in 1925Thiele ( -1926 Faso, Ghana, Togo, Bénin, Niger, Nigeria, Cameroon, Chad, Equatorial Guinea and Gabon (Ntonifor and Ajayi 2007;Okafor and Ngang 2008;Salawu and Odaibo 2014;Diakité et al 2017;Abe et al 2018;Ouedraogo et al 2018) Evidence in Bénin. Widespread, especially at Djèffa and Ganhatin (Assogba and Youssao 2002); Acron, Cotonou garden ASECNA, Djidja, Nikki, Péhunco and Pèrèrè towns, Sô Ava, Pahou, Sand quarries, and Sô Tchanhoué (Ibikounlé et al 2009(Ibikounlé et al , 2013(Ibikounlé et al , 2014a; Alibori River (Agblonon Houelome et al 2017); Sô River (Koudenoukpo 2018 (Jørgensen et al 2011).…”

“…Bulinus globosus is diploid (2n = 36) (see Jelnes 1986). Faso, Ghana, Togo, Bénin, Niger, Nigeria, Cameroon, Chad, Equatorial Guinea and Gabon (Ntonifor and Ajayi 2007;Okafor and Ngang 2008;Salawu and Odaibo 2014;Diakité et al 2017;Abe et al 2018;Ouedraogo et al 2018).…”