Table 3.

Detection of Cryptosporidium parvum and C. bovis/ryanae using PCR analysis and ELISA.

Group		No. tested	C. parvum						C. bovis/ryanae
			PCR			ELISA			PCR
			No. positive (%)	95% CIa	P-value	No. positive (%)	95% CIa	P-value	No. positive (%)	95% CIa	P-value
Sex	Male	433	21 (4.8)	2.8–6.9	0.312	42 (9.7)	6.9–12.5	0.370	15 (3.5)	1.7–5.2	0.911
	Female	248	8 (3.2)	1.0–5.4		19 (7.7)	4.4–11.0		9 (3.6)	1.3–6.0
	Unknown	270	29 (10.7)	7.1–14.4		31 (11.5)	7.7–15.3		15 (5.6)	2.8–8.3
Type of cattle	Beef	909	56 (6.2)	4.6–7.7	0.529	90 (9.9)	8.0–11.8	0.954	38 (4.2)	2.9–5.5	0.895
	Dairy	21	2 (9.5)	0–22.1		2 (9.5)	0–22.1		1 (4.8)	0–13.9
	Unknown	21	–	–		–			–	–
Region	Northern	222	3 (1.4)	0–2.9	<0.001	10 (4.5)	1.8–7.2	<0.001	5 (2.3)	0.3–4.2	0.059
	Central	146	26 (17.8)	11.6–24.0		29 (19.9)	13.4–26.3		3 (2.1)	0–4.4
	Southern	583	29 (5.0)	3.2–6.7		53 (9.1)	6.8–11.4		31 (5.3)	3.5–7.1
Season	Spring (Mar–May)	252	15 (6.0)	3.0–8.9	0.854	18 (6.7)	3.7–9.8	0.158	2 (0.8)	0–1.9	<0.001
	Summer (Jun–Aug)	240	13 (5.4)	2.6–8.3		22 (9.2)	5.5–12.8		18 (7.5)	3.5–9.8
	Fall (Sep–Nov)	250	18 (7.2)	4.0–10.4		25 (10.0)	6.3–13.7		13 (5.2)	2.5–8.0
	Winter (Dec–Feb)	209	12 (5.7)	2.6–8.9		28 (13.4)	8.8–18.0		6 (2.9)	1.2–6.4
Type of diarrhea	Hemorrhagic	105	0	–	0.025	1 (1.0)	0–2.8	0.004	10 (9.5)	2.5–12.7	0.008
	Watery	419	27 (6.4)	4.1–8.8		49 (11.7)	8.6–14.8		17 (4.1)	2.2–6.0
	Pasty	427	31 (7.3)	4.8–9.7		42 (9.8)	7.0–12.7		12 (2.8)	1.6–5.0
Total		951	58 (6.1)	4.6–7.6		92 (9.7)	7.8–11.6		39 (4.1)	2.5–5.4

^aCI: Confidence interval.