›› 1997, Vol. 15 ›› Issue (4): 246-250.

• 流行病学调查 • Previous Articles     Next Articles

PILOT STUDY ON CONTAMINATION OF SOIL WITH ASCARID EGG AND OTHER PARASITESIN RURAL AREASOF THREE SOUTHERN PROVINCESIN CHINA

Xu Longqi1; Noriji Suzuki2; Jiang Zexiao1; Feng Zheng1; Chen Pulin1; Zhou

Changhai1; Zhu Xianzu1; Ding Xiaoming3; Chen Hejian4; Guo Mignzhang5; Lu Ping1

  

  1. 1　Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, WHO Collaborating Centre for Malaria, Schistosomiasis and Filaraisis, Shanghai 200025 2　Department of Parasitology, Kochi Medical School, Japan 3　State Family Planning commission, Beijing 100088 4　Nanchuan County Family Planning Commission, Sichuan Province, Nanchuan, 648400 5　Duyun County Family Planning Commission, Guizhou Province, Duyun, 558000 6　Yuyao County Family Planning Commission, Zhejiang Province Yuyao, 315400
  • Received:1900-01-01 Revised:1900-01-01 Online:1997-08-30 Published:1997-08-30

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Abstract: AIM:To further survey contamination of soil with ascarid eggs and other para- sites
in and surrounding peasant’s dwellings in rural areas in south of Changjiang River.METH-
ODS:Three counties in the South of Changjiang River basin,i.e. Duyun of Guizhou Province,
Nanchuan of Sichuan Province and Yuyao of Zhejiang Province were selected as pilot spots.In each
pilot county,twenty households ( 7sites for each) were surveyed and one middle and prima- ry
school of each county as well as 2 vegetable markets and 2 meat markets were also included. Eggs were isolated from soil with 5% NaOH, centrifuged and floated with saturated magnesium sulfate solution and examinated under microscope. RESULTS: The number of ascarid eggs was highest in Duyun (1 622. 5/10 g) , fo llowed successively by Nanchuan (1 099. 2/10 g) and Yuyao( 149. 0/10 g). Among the 7 sites contamination was higest at toilet, the number of ascarid eggs took 64. 4% of the total, which was consecutively followed by livestock pen (9. 3% ), courtyard (7. 3% ), kitchen (7. 2% ), th reshold (6. 5% ), sitting room (3. 1% ) and bedroom (2. 7% ). Besides, eggs of Trichuris trichiura, Capillaria hepatica, Toxocara canis, Strongy loides sp. , Hymenolepis diminuta, oocyst of Eimeria sp. were also detected. CONCLUSION: A scarid egg contamination is most serious in rural areas of South China. Suggestion is made to strengthen night soil disposal, health education as well as rat control.

Key words: Soil contamination, ascarid eggs, other nematode eggs, tapeworm eggs, ratparasite