Prevalence of Schistosoma mansoni and S. haematobium in Snail Intermediate Hosts in Africa: A Systematic Review and Meta-analysis

Table 2

The pooled prevalences of S. mansoni and S. haematobium infection among Biomphalaria and Bulinus snails of Africa.

Snail genus	Snail species	Studies (n)	Examined snails (n)	Infected snails
				n	pp (95%CI)
Biomphalaria	B. pfeifferi	19	46480	987	5.10 (4.05–6.15)
	B. sudanica	5	47027	1032	6.73 (4.46–9.01)
	B. alexandrina	4	3569	62	2.81 (0.75–4.87)
	B. choanomphala	2	16,100	225	1.58 (0.44–2.21)
	B. stanleyi	1	21,715	949	4.37 (4.09–4.64)
	Unclassified Biomphalaria snails	3	20414	479	21.28 (-1.78–44.34)
Bulinus	B. globosus	14	13691	2511	12.25 (6.23–18.27)
	B. truncatus	13	42538	2077	5.78 (4.36–7.20)
	B. nasutus	2	28648	278	0.98 (0.76–1.20)
	B. senegalensis	2	7344	10	4.73 (-10.72–20.18)
	B. umbilicatus	1	339	22	6.49 (3.71–9.27)
	B. forskalii	3	21461	37	0.13 (0.08–0.34)
	B. camerunensis	1	7	4	57.14 (21.30–92.99)
	Unclassified Bulinus snails	1	4312	9	2.1 (0.10–3.90)
	Total	51	273 643	8682	5.51 (4.95–6.07)