Table 7. Prevalences by intestinal protozoa and helminths found in the 865 schoolchildren surveyed in the Atlitxco municipality, Puebla, Mexico, and results obtained in nitazoxanide treatments.

Parasite species	Total positive subjects		Treated subjects followed		Negative after first treatment course		Negative after second treatment course
	No.	%	No.	%	No.	%	No.	%
Protozoa:
Entamoeaba histolytica/dispar	69	8.0	61	88.4	53	86.8	8	100
Giardia intestinalis	65	7.5	54	83.0	50	92.6	4	100
Blastocystis hominis	9	1.0	3	33.3	3	100	–	–
Helminths:
Fasciola hepatica	50	5.8	50	100	47	94.0	3	100
Hymenolepis nana	20	2.3	12	60.0	12	100	–	–
Ascaris lumbricoides	199	23.0	150	75.3	150	100	–	–
Trichuris trichiura	79	9.2	73	92.4	73	100	–	–
Ancylostomatidae	17	2.0	13	76.4	0	0	13	100
Enterobius vermicularis *	27	3.1	21	77.7	17	80.9	4	100

^*Underestimating data due to the impossibility of using anal swabs for the detection of E. vermicularis eggs.