Table 1. Distribution of parasites in 1338 fecal samples stratified by age.

Parasite	≤ 12 years old	> 12 to 64 years old	≧ 65 years old
Blastocystis sp	54 (19.6)	195 (23.2)	34 (27.4)
Endolimax nana	22 (8.0)	112 (13.3)	14 (11.3)
Entamoeba coli	36 (13.0)	108 (12.8)	15 (12.1)
Entamoeba histolytica	14 (5.1)	29 (3.4)	3 (2.4)
Giardia lamblia	24 (8.7)	16 (1.9)	1 (0.8)
Iodamoeba butschlii	2 (0.7)	9 (1.1)	1 (0.8)
Strongyloides stercoralis	0 (0.0)	7 (0.8)	1 (0.8)
Ascaris lunbricoides	6 (2.2)	6 (0.7)	1 (0.8)
Entamoeba hartmanni	1 (0.4)	3 (0.4)	1 (0.8)
Schistosoma mansoni	0 (0.0)	3 (0.4)	0 (0.0)
Trichuris trichiura	2 (0.7)	2 (0.2)	1 (0.8)
Hookworms	0 (0.0)	2 (0.2)	0 (0.0)
Enterobius vermicularis	0 (0.0)	2 (0.2)	0 (0.0)
Taenia sp	0 (0.0)	1 (0.1)	0 (0.0)
Hymenolepis nana	0 (0.0)	1 (0.1)	0 (0.0)
Cryptosporidium sp	0 (0.0)	1 (0.1)	0 (0.0)