[Epidemiological study on the influence of pig-derived Ascaris to the transmission of human ascariasis].

Abstract

OBJECTIVE:

An experimental epidemiological study was designed to investigate possible relations of pig-derived Ascaris to the transmission of human ascariasis which might be caused by cross-infection between the pig and humans.

METHODS:

In Xinjian County, Jiangxi province, two adjacent villages, Laozhi and Panzhi, with similar baseline of ascariasis in pig and human populations were selected as the study sites with a one-year longitudinal epidemiological follow-up study. People in the two villages received mass chemotherapy. Pigs received mass chemotherapy only in Panzhi village and was twice repeated with two months interval, while pigs in Laozhi village were not treated at all. In the following year after treatment on humans, ascariasis among villagers was studied cross-sectionally five times with Kato-katz technique.

RESULTS:

No significant difference of the re-infection patterns of human ascariasis was found between the two villages in terms of prevalence and intensity during the following year in all the five surveys (chi(2) < 0.658, F < 1.658 and P > 0.1).

CONCLUSION:

The results suggested that pig-derived Ascaris were mainly transmitted among pigs but had no important role on the transmission of human ascariasis. The results were in good accordance with the findings through a recent molecular genetic research on the local human-and pig-derived Ascaris worms. Possible confounding factors were discussed.

• Authors: W Peng, X Zhou
• Journal: Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi (Zhonghua Liu Xing Bing Xue Za Zhi) Vol. 22 Issue 2 Pg. 116-8 (Apr 2001) ISSN: 0254-6450 [Print] China
• PMID: 11860859 (Publication Type: English Abstract, Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Animals
• Ascariasis (drug therapy, transmission, veterinary)
• Ascaris suum
• Humans
• Swine
• Swine Diseases (transmission)