›› 1997, Vol. 15 ›› Issue (3): 18-180.

• 流行病学调查 • Previous Articles     Next Articles

SURVEY OF CONTAMINATION OF VEGETABLESAND SHOE-SOLE SOIL WITH ASCARIS AND OTHER SOIL-TRANSM ITTED HELMINTHS

Xu Longqi1, Zhu Xianzu1, Jiang Zexiao1, Feng Zheng1, Zhou Changhai1, Noriji Suzuki2, Wang Shunong3, Chen Weizu4, Xiao Huadong4, Yi Yanzhi5, Tao Taishun5   

  1. 1 Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai 200025, China2 Department of Parasitology, Kochi Medical School, Japan3 Chinese State Family Planning Commission. Beijing 1000884 Shaowu County Family Planning Commission, Shaowu County, Fujian Province 3540005 Jiangning County Family Planning Commission, Jiangning County, Jiangsu Province 211000
  • Received:1900-01-01 Revised:1900-01-01 Online:1997-06-30 Published:1997-06-30

Abstract:

AIM: To understand the transmission route of soil-transmitted helminth in the villages of Fujian and Jiangsu Provinces. METHODS: Soil samples were washed with water and the sedimented larvae were examined by direct smear method. Eggs were examined after separated from soil by floating with saturated sodium nitrate solution. RESULTS: Out of 16 kinds of vegatables collected from 18 households in 3 villages in Shaowu County, Fujian Province, 7 kinds were found to have the eggs and/or larvae of Ascaris and other soil-transmitted helminths. 19 samples from 47 samples were positive, the positive rate being 40.4%. Among them, garlic, onion, cabbage and water spinach were found to have higher detection rate. Of 17 kinds of vegetables collected from 20 households in 2 villages in Jiangning County, Jiangsu Province, 11 kinds were found to have eggs of Asca ris and Rhabditis larvae. 21 samples from 79 samples were egg positive, the positive rate being 26.6%. Green vegetable, water spinach and three-coloured amaranth had a higher positive rate. 4 kinds of vegetables (onion, pakchoi, coriander and cucumber) among 7 kinds bought from the market in Shaowu County, were egg positive. In Jiangning County, 4 kinds (radish, onion, tomato and yam bean) from 9 kinds were positive (Al and/or S.). The egg positive rate of the shoe-sole soil samples in Shaowu County, Fujian Province (55.6% ) was higher than that in Jiangning County, Jiangsu Province (15.0%). Ascaris lumbricoides, hookworm, Trichostrongylus and Toxocara canis were found in both places. CONCLUSION: The vegetables shoe-sole soil contaminated with helminth eggs and larvae played a role in the dissemination of soil-transmitted helminths.

Key words: Vegetable, shoe-sole soil, Ascaris egg contamination, filariform larva of hookworm, filariform larva of Strongyloides stercoralis