Abstract:

Objective To analyze on the eggs of soil-transmitted nematodes by Kato-Katz technique in the single smear, and explore the interrelation between the detection rate of singe slide of Kato-Katz and the density of eggs in the stool samples. Methods The stool samples of the residents above three years old at Mengcheng County in Anhui were collected, and Ascaris lumbricoides, Trichuris trichiura and hookworms with modified Kato- Katz thick smear were examined once a year from September to November, 2006 to 2010. The number of eggs per slide was used to describe the density of eggs in the stool samples. The probability of the eggs appeared in the three smears was analyzed and compared. Results There was no statistical significance difference on the occurrence rate of eggs among the three slides. The occurrence rate of eggs was 52.26% in a single smear when the EPS less than 2, and 99.26% when the EPS was more than 16.Conclusion The occurrence rate of eggs in a singe slide was associated with EPS by Kato-Katz technique.

Key words: Soil-transmitted nematodes, Kato-Katz technique, Detective rate, Density of eggs in stool sample