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Korean J Parasitol > Volume 10(1):1972 > Article

Original Article
Korean J Parasitol. 1972 Apr;10(1):8-21. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1972.10.1.8
Copyright © 1972 by The Korean Society for Parasitology
Studies on the incidence of the intestinal protopozoa in the mountainous area of Chollapuk-do
Hong Ki Min
Department of Parasitology, Yonsei University Medical College, Seoul, Korea.
Abstract

This study was undertaken in order to elucidate the prevalences of the intestinal protozoan infection according to localities and the mode of the infestation in the mountainous area of Chollapuk-do, Korea during the year 1970-1971.

8,508 of fecal samples were collected among the inhabitants of the mountainous area, which covered 18 Myens(=Township) from 6 Guns(=County) in the eastern part of Chollapuk-do. Most of the inhabitants of this area were engaged in farming and living under lower economic and poor sanitary conditions.

The samples were examined twice repeatedly by iodine stained direct fecal smear method.

For the study on the mode of infestation, with the exception of drinking water, the zinc sulfate floatation technic was applied for the examinations of hog-feces, manure heap, garden soil, sewage, dishtowel, dust in room and floor, house fly and house rat.

The results were summarized as follows:

1. Among total 8,508 fecal specimens examined, 3,152(37.6%) were positive for the intestinal protozoa: E. histolytica 9.8%, E. coli 25.6%, E. nana 7.2%, G. lamblia 6.8%, I. butschlii 0.6%, and C. mensnili 0.7%.

2. A single infection of the intestinal protozoa was the highest(68.3%), and double infection(22.3%) triple, quadruple and quintuple infections were in decreasing order.

3. The highest distribution (39.8%) was observed in the group aging 41-50, and the lowest (27.3%) in the group above 61. The groups under 10 years showed a relatively high positive rate among all age groups.

4. Sexual distribution of protozoan infection showed slightly higher rate (38.6%) in male than that (35.4%) of female.

5. Jangsoo-gun showed the highest positive rate (42.9%) and Namwon-gun was the lowest (32.5%). The prevalence of E. histolytica showed the highest (11.6%) in Imsil-gun and the lowest (6.9%) in Jangsoo-gun.

6. E. histolytica cysts were found 9.1% among total 99 samples of hog feces, 4.8% among 78 samples of manure heap, 0.6% among 164 samples of fingernail dirt, 5.3% among 57 samples of drinking water, 15.8% among 19 samples of sewage, 7.1% among 42 samples of dishtowel, 0.1% among 780 samples of house fly and 5.0% among 40 samples of house rat.

Figures


Fig. 1
Location of surveyed areas in mountainous area in Chollapuk-do, Korea


Fig. 2
Prevalence rate of intestinal protozoa in surveyed districts in mountainous area, Chollapuk-do.


Fig. 3
Prevalence rate of intestinal protozoa according to sex and age by stool examination.


Fig. 4
Prevalence rate of intestinal protozoa according to age by stool examination in mountainous area, Chollapuk-do.


Fig. 5
Prevalence rate of Entamoeba histolytica according to sex and age by stool examination.


Fig. 6
Prevalence rate of Entamoeba coli according to sex and age by stool examination.


Fig. 7
Prevalence rate of Giardia lamblia according to sex and age by stool examination.


Fig. 8
Number of individuals positive for one or more protozoa infection.

Tables


Table 1
Surveyed population according to sex, age and district in mountainous area, Chollapuk-do


Table 2
Prevalence rate of intestinal protozoa in surveyed districts in mountainous area, Chollapuk-do


Table 3
Prevalence rate of intestinal protozoa according to sex and age by stool examination


Table 4
Prevalence rate of intestinal protozoa according to age by stool examination in mountainous area, Chollapuk-do


Table 5
Prevalence rate of Entamoeba histolytica according to sex and age by stool examination


Table 6
Prevalence rate of Entamoeba coli according to sex and age by stool examination


Table 7
Prevalence rate of Endolimax nana according to sex and age by stool examination


Table 8
Prevalence rate of Giardia lamblia according to sex and age by stool examination


Table 9
Prevalence rate of Iodamoeba butschlii according to sex and age by stool examination


Table 10
Prevalence rate of Chilomastix mesnili according to sex and age by stool examination


Table 11
Number of individuals positive for one or more protozoa infection


Table 12
Contamination of E. histolytica cysts in various samples from mountainous area


Table 13
Comparative prevalence of intestinal protozoa in special references from 1926 to 1971 in Korea

References
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