Prevalence of Intestinal Parasitic Infection among Food Handlers in Northwest Iran

Table 2

Frequency of pathogenic intestinal parasites on the separation of producers and suppliers of food trade in Tabriz.

Pollution trade unit	Total	Without infection	Infection
			Giardia	Ascaris	Entamoeba coli	H. nana	Entamoeba histolytica	Number of positive samples	% of positive samples	% of all samples
Supermarket	880	842	23	4	7	2	2	38	22.1 (38/172)	0.823 (38/4612)
Restaurant	821	797	14	2	5	1	2	24	13.95 (24/172)	0.52 (24/4612)
Sandwich and pizza	709	676	21	2	8	1	1	33	19.2 (33/172)	0.715 (33/4612)
Confectionery	229	221	5	—	2	—	1	8	4.65 (8/172)	0.173 (8/4612)
Bakery	274	265	5	1	2	1	—	9	5.25 (9/172)	0.195 (9/4612)
Butcher	95	91	2		1	—	1	4	2.32 (4/172)	0.086 (4/4612)
Dairy	403	383	13	1	5	—	1	20	11.65 (20/172)	0.433 (20/4612)
Production workshop	889	876	11	—	2	—	—	13	7.55 (13/172)	0.281 (13/4612)
Ice cream and juice	312	289	15	—	6	1	1	23	13.3 (23/172)	0.498 (23/4612)
Sum	4612	4440	109	10	38	6	9	172	—	—
% of positive samples	—	—	63.37	5.81	22.1	3.48	5.23	100	100	—
% of all samples	100	96.27	2.36	0.0021	0.0082	00.13	00.195	3.73	—	3.73