Urogenital schistosomiasis transmission on Unguja Island, Zanzibar: characterisation of persistent hot-spots

Parasites & Vectors

Table 1 Prevalence of S. haematobium in schoolchildren in persistent hot-spot and low-prevalence shehias in Unguja

	Population size (2014)^a	2012 (1st year students)		2012 (9–12 year-old students)		2013 (9–12 year-old students)		2014 (9–12 year-old students)
	Population size (2014)^a	n/N ^b	%^c	n/N	%	n/N	%	n/N	%
Persistent hot-spot shehias
Bandamaji	1273	5/44	11.4	16/94	17.0	24/89	27.0	32/117	27.4
Kinyasni	3302	24/100	24.0	21/105	20.0	20/108	18.5	37/112	33.0
Chaani	3666	8/77	10.4	6/131	4.6	35/113	31.0	12/119	10.1
Koani	3083	15/102	14.7	15/94	16.0	41/109	37.6	27/111	24.3
Kitope	2526	24/96	25.0	12/89	13.5	9/111	8.1	16/112	14.3
Low-prevalence shehias
Dole	3015	0/36	0.0	0/49	0.0	1/58	1.7	0/62	0.0
Mkwajuni	4792	1/97	1.0	0/118	0.0	2/115	1.7	1/111	0.9

^aShehia population sizes were estimated by multiplying the population size recorded in the 2012 Population and Housing census [29] by the annual growth rate (2.8%)
^b N = number of children sampled; n = number of children infected
^c% = percentage of children infected with S. haematobium

ISSN: 1756-3305