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

Table 5 Schistosoma haematobium egg counts on discrepant slides when examined by original or quality control urine filtration (QCUF) microscopy

Microscopic examination		n	%
Children	Slides with original and QCUF reading	4477
	Slides with positive results in both readings	1096
	Slides with negative results in both readings	3087
	Slides with discrepant results (one reading positive, one reading negative)	294
	S. haematobium egg counts on discrepant slides
	1 egg	93	31.6
	2 eggs	57	19.4
	3 eggs	39	13.3
	4 eggs	23	7.8
	5 eggs	14	4.8
	1–5 eggs	226	76.9
	6–10 eggs	36	12.2
	11–49 eggs	22	7.5
	50+ eggs	10	3.4
Adults	Slides with original and QCUF reading	1566
	Slides with positive results in both readings	199
	Slides with negative results in both readings	1292
	Slides with discrepant results (one reading positive, one reading negative)	75
	S. haematobium egg counts on discrepant slides
	1 egg	34	45.3
	2 eggs	12	16.0
	3 eggs	6	8.0
	4 eggs	7	9.3
	5 eggs	4	5.3
	1–5 eggs	63	84.0
	6–10 eggs	10	13.3
	11–50 eggs	1	1.3
	51+ eggs	1	1.3