Urogenital schistosomiasis elimination in Zanzibar: accuracy of urine filtration and haematuria reagent strips for diagnosing light intensity Schistosoma haematobium infections

Table 1 Multivariate frequency distribution of S. haematobium infection and egg counts and haematuria presence and grading

Urine filtration original reading			Microhaematuria			Microhaematuria grading				Macrohaematuria grading
	n	%	n negative	n positive including trace	% positive	Trace	+	++	+++	1	2	3	4	5	6
Total children examined	39,207		36,675	2532	6.5
S. haematobium egg-negative	37,077	94.6	36,070	1007	2.7	430	264	205	108	19,070	14,265	3508	223	11	0
S. haematobium egg-positive	2130	5.4	605	1525	71.6	292	290	468	475	801	1030	279	18	2	0
S. haematobium egg counts
1–5 eggs	740	34.7	369	371	50.1	102	91	116	62	332	216	89	30	0	0
6–10 eggs	284	13.3	85	199	70.1	52	41	62	44	117	137	28	2	0	0
11–49 eggs	646	30.3	119	527	81.6	103	113	167	144	234	325	81	6	0	0
50+ eggs	460	21.6	32	428	93.0	35	45	123	225	118	252	81	7	2	0
Total adults examined	18,155		16,131	2024	11.1
S. haematobium egg-negative	17,673	97.3	15,985	1688	9.6	541	475	383	289	7275	7972	2250	170	5	1
S. haematobium egg-positive	482	2.7	146	336	69.7	65	62	99	110	157	245	67	11	2	0
S. haematobium egg counts
1–5 eggs	225	46.7	93	132	58.7	28	40	29	35	80	109	31	5	0	0
6–10 eggs	64	13.3	18	46	71.9	11	5	19	11	25	27	9	2	1	0
11–49 eggs	124	25.7	27	97	78.2	17	14	32	34	38	71	13	1	1	0
50+ eggs	69	14.3	8	61	88.4	9	3	19	30	14	38	14	3	0	0

ISSN: 1756-3305