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Korean J Parasitol > Volume 14(1):1976 > Article

Original Article
Korean J Parasitol. 1976 Jun;14(1):32-40. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1976.14.1.32
Copyright © 1976 by The Korean Society for Parasitology
Demonstration of helminth eggs and larvae from vegetable cultivating soil
Jung Suk Lee
College of Home Economics, Youngnam University, Taegu, Korea.
Abstract

In order to clarify the contamination of vegetable gardens with human intestinal helminths, the soil samples were examined for the presence of eggs and larvae during the period from September 1973 to August l974.

When soil samples collected from the vegetable gardens in Taegu were examined, four species of helminth eggs (ascarid, whipworm, hookworm and liver fluke) and a number of unknown eggs were found.

Ascarid was found to be highest in the rate of detection(82.5%), followed by whipworm. The rates of hookworm, liver fuke and Trichostrongylus species were unexpectedly low. There was no difference between detection rate of vegetable gardens and that of vinyl green houses. However, the average number of helminth eggs detected from the soil of vinyl green houses was higher than the number of vegetable gardens.

In the monthly incidence of ascarid eggs, the highest rate was found in September, and the least often was observed in August. While, the peak in the average number of the egg was encountered in August.

There was no distinct trend in the monthly incidence of whipworm. However, it is likely that the detection number of whipworm per 100 gm of soil examined was relatively abundant in a period from May to August, and very little from October to April of next year. When the soil of vegetable gardens was divided into superficial, intermediate and deep layers and examined for presence of ascarid egg. The average number of the eggs found of the superficial layer was more abundant than those of the intermediate and deep layers, but the rate for the former was similar with the latter.

In the demonstration of larval nematodes from the soil of vegetable gardens and vinyl houses, there found the filariform and rhabditoid larvae of hookworm and the larvae of Trichostrongylus species and unknown one. The majority of the larvae detected was belonged to unknown species, followed by hookworm larvae. The least was found in the rate of Trichostrongylus species. Generally, the filariform larva of hookwom could be detected during the hot season from May to August, but no larva was found in the winter.

This suggests that the soil of vegetable gardens and vinyl green houses in Taegu is contaminated with human intestinal helminths.

Tables


Table 1
Demonstration of human helminth eggs from vegetable gardens and vinyl green house in Taegu (1973~1974)


Table 2
Comparison of number of human helminth eggs detected per 100gm of soil from vegetable gardens with vinyl green house (1973~1974)


Table 3
Monthly variation of intestinal helminth eggs detected from vegetable gardens soil (1973~1974)


Table 4
Monthly variation of intestinal helminth eggs per 100gm of vegetable gardens soil (1973~1974)


Table 5
Intestinal helminth eggs detected in different layer of vegetable gardens soil


Table 6
Demonstration of larval nematodes from soil of vegetable gardens and vinyl green houses


Table 7
Monthly variation of larval nematodes detected fro vegetable garden soil (1973~1974)


Table 8
Climatic condition in Taegu (From September, 1973 to August, 1974)

References
1. Beaver PC. Persistence of hookworm larvae in soil. Am J Trop Med Hyg 1953;2(1):102–108.
 
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