Table 2.

Occurrence of Cryptosporidium hominis, Giardia duodenalis, and co-infections of the two among 396 specimens from children in a welfare institute in Shanghai, China by age, gender, diarrhea status, and sampling time.^∗

Group	Cryptosporidium hominis					Giardia duodenalis					Co-infection
	1st sampling	2nd sampling	3rd sampling	Subtotal	P-value	1st sampling	2nd sampling	3rd sampling	Subtotal	P-value
Age (month)					P = 0.0001					P = 0.081
0–12	24.6 (14/57)	16.7 (7/42)	18.4 (7/38)	20.4 (28/137)		50.9 (29/57)	31 (13/42)	21.1 (8/38)	36.5 (50/137)		7.3 (10/137)
13–24	11.9 (8/67)	0 (0/23)	2.9 (1/34)	7.3 (9/124)		55.2 (37/67)	39.1 (9/23)	47.1 (16/34)	50 (62/124)		5.6 (7/124)
25–36	3.4 (1/29)	0 (0/9)	0 (0/21)	1.7 (1/59)		55.2 (16/29)	55.6 (5/9)	19.0 (4/21)	42.4 (25/59)		1.7 (1/59)
37–48	0 (0/15)	0 (0/1)	0 (0/13)	0 (0/29)		40 (6/15)	100 (1/1)	23.1 (3/13)	34.5 (10/29)		0 (0/29)
>48	2.6 (1/39)	0 (0/3)	0 (0/5)	2.1 (1/47)		30.8 (12/39)	0 (0/3)	40 (2/5)	29.8 (14/47)		2.1 (1/47)
Gender					P = 0.622					P = 0.237
Male	13.5 (15/111)	5.4 (2/37)	3.6 (2/55)	9.4 (19/203)		50.5 (56/111)	35.1 (13/37)	32.7 (18/55)	42.9 (87/203)		4.9 (10/203)
Female	10.3 (9/87)	12.2 (5/41)	10.7 (6/56)	10.9 (20/184)		50.6 (44/87)	36.6 (15/41)	26.8 (15/56)	36.9 (68/184)		4.9 (9/184)
Unknown	0 (0/9)	0 (0/0)	0 (0/0)	0 (0/0)		66.7 (6/9)	0 (0/0)	0 (0/0)	6.7 (6/9)		0 (0/9)
Diarrhe					P = 0.006					P = 0.832
Yes	19.6 (9/46)	17.6 (3/17)	14.3 (3/21)	17.9 (15/84)		56.5 (26/46)	11.8 (2/17)	33.3 (7/21)	41.7 (35/84)		10.7 (9/84)
No	9.3 (15/161)	6.6 (4/61)	5.6 (5/90)	7.7 (24/312)		46 (74/161)	42.6 (26/61)	28.9 (26/90)	40.4 (126/312)		3.2 (10/312)
Total	11.6 (24/207)	9 (7/78)	7.2 (8/111)	9.8 (39/396)		48.3 (100/207)	35.9 (28/78)	29.7 (33/111)	40.7 (161/396)		4.8 (19/396)

^∗Data are presented as percent of infection rate (No. of spositive/No. of specimens).