Table 1.

Occurrence of Cryptosporidium oocysts and Giardia cysts in water samples collected from swimming pools in Beijing, China

	No. of sample	Cryptosporidium (no. of oocysts/10 L)				Giardia (no. of cysts/10 L)
		No. of positive (%)	Mean±SD	Min.–Max.	95% UCLa	No. of positive (%)	Mean±SD	Min.–Max.	95% UCLa
Time of sampling
May 2015	27	2 (7.4)	0.07±0.27	0–1	0.20	4 (14.8)	0.22±0.64	0–3	0.50
August 2015	33	8 (24.2)	0.48±1.00	0–4	0.85	5 (15.2)	0.30±0.77	0–3	0.58
Pool type
Outdoor pool	5	2 (40.0)	0.60±0.89	0–2	1.50	2 (40.0)	0.80±1.30	0–3	2.00
School pool	12	4 (33.3)	0.58±1.00	0–3	1.17	2 (16.7)	0.25±0.62	0–2	0.67
Community pool	9	1 (11.1)	0.22±0.67	0–2	0.80	2 (22.2)	0.33±0.71	0–2	0.88
Hotel pool	13	1 (7.7)	0.15±0.38	0–1	0.38	1 (7.7)	0.23±0.83	0–3	0.75
Bath pool	12	0 (0.0)	0.00±0.00	0–0	0.00	0 (0.0)	0.00±0.00	0–0	0.00
Commercial pool	9	2 (22.2)	0.44±1.33	0–4	1.45	2 (22.2)	0.33±0.71	0–2	0.80
Total	60	10 (16.7)	0.30±0.79	0–4	0.50	9 (15.0)	0.27±0.71	0–3	0.45

^aUCL, upper confidence limit which was calculated based on 1,000 bootstrap samples using PASW statistics 18 software.