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PubMed1976

Frequency Distribution Of Enterobius Vermicularis In A Highly Endemic Population.

The distribution patterns of worm burden of Enterobius vermicularis were studied in a primary school in rural part of Korea, on July, September and November 1976, for successively three times on 285 children. Out of the subjected children treated with pyrantel pamoate at the dose of 10 mg/kg body weight, 107 in the first, 55 in the second and 43 in the third trials were cooperative in the satisfactory collection of whole amount of feces for three days in respective trials. The distribution patterns of worm burden in these subjected children were considered by statistical analyses for the fitness with theoretical lognormal and negative binomial frequencies. The theoretical values from equations of lognormal distribution was fitted to the observed frequency distibution patterns throughout three trials, but in the second trial undertaken on September 17, 1976, both the lognormal and negative binomial were found to fit the observed data, probably because of rarity of heavy infection cases and high frequency of noninfected cases.

Journal Article↗
PubMed1976

Relationships between the results of repeated anal swab examinations and worm burden of Enterobius vermicularis.

To relate the results of repeatedly undertaken anal swabs to worm burden of Enterobius vermicularis in a highly endemic community, 193 rural schoolchildren, divided into 4 groups, were examined daily by Scotch-tape anal swab method, 1, 2, 3 and 4 times respectively. All of the schoolchildren were treated with pyrantel pamoate 10 mg/kg body weight exactly after the last anal swab in each group disregard the results. And all of the expelled E. vermicularis were collected and counted. It was found that 68.8% of total anal swabs were positive and the collection rate of E. vermicularis was 90.7% with average worm burden, 17.0, in surveyed children. From the analyses of the obtained data, following three inferences were derived. 1. The consecutive postive findings of anal swabs could not reduce the possibilities of detecting light worm burden cases when the anal swabs were undertaken daily up to 4 times. 2. The possibilities of detecting the heavy infection cases were found in consecutively positive categories of anal swab and the presence of negative result(s) of anal swab during the consecutive examinations did denote the reduced possibilities of detection heavy infection. 3. The consecutive negative findings in anal swab have tendenicies reducing the possibilities of detecting heavy worm burden cases. Above results were highly suggestive that the processes of infection loss in E. vermicularis were taken place continuously, allowing daily small allotments of discharge of fully gravid worms in heavy infection cases and massive discharge in a very short period of time is practically rare event.

Journal Article↗
PubMed1980

Chemotherapeutic control of Enterobius vermicularis infection in orphanages.

To observe the effect of egg-free state in an institute on the endemicity of Enterobius vermicularis, the theoretical condition was made by repeated chemotherapy. Mebendazole or pyrantel pamoate were administered to all orphans and their staffs concomitantly for four times, each 20-day interval. In two low endemic orphanages, in which mean egg positive rates were 18 % and 39 % respectively, the pinworm infection was controlled up to 6~7 months period. And other two highly endemic orphanages, with 70% and 55% of egg positive rates, were controlled up to 90th day after the first treatment. After then up to 7 months, the reinfection occurred, but the endemicity was brought down to about 20 % of egg positivity.

Journal Article↗
PubMed1984

[Status of Enterobius vermicularis Iifection in primary school children, Yongyang-Kun, Kyongbuk Province]

An epidemiological study was undertaken to estimate the prevalence of Enterobius vermicularis infection among the primary (and infant) school children in Yongyang-gun, Kyongsangbuk-do. During the period from 2 to 14 December 1983, a total of 2,227 school children in 13 schools were examined one time by means of scotch-tape anal swab technique with a simple questionaire study on perianal itching, enuresis and school record. The results are as follows:The overall egg positive rate was 64.1 percent and the rate ranged from 46.6 to 86.7 percent by schools. The egg positive rates of boys and girls were 60.5 and 68.0 percent respectively and the difference was statistically significant (p<0.005). There was noted a tendency of decrease in prevalence by increase of the age of children. It was revealed that perianal itching and school record were significantly correlated with E. vermicularis infection (p<0.05) while not in case of enuresis (p>0.l).

Journal Article↗
PubMed1985

[Number of intrauterine eggs in female Enterobius vermicularis by body length]

In order to correlate the number of eggs in female Enterobius vermicularis with their body length and to re-evaluate the number of eggs liberated by gravid females, a total of 203 worms were examined. Those females were removed from naturally infected orphans with mebendazole (100 mg) and had been fixed in 10 percent formalin(Cho et al., 1981). The decent ones which were selected under dissecting microscope were unbroken, neatly fixed females without contaminated eggs on their surface. The worms were measured by their body length, softened in 0.1N NaOH solution overnight, and teased by dissecting needles. And their number of shelled eggs was measured in a counting chamber made as described by Denham et al. (1971). The results were summarized as follows: The observed females, 4.10~9.90 mm long, began to have shelled eggs in uterus when body length was 5.50 mm or longer. The percentage of females with eggs in uterus was as follows by range of body length: 25 percent in 5.50~5.99 mm long, 53.3 percent in 6.00~6.49 mm long, 86.7 percent in 6.50~6.99 mm long, 95.2 percent in 7.00~7.49 mm long and 100 percent in 7.50 mm or longer. The mean and standard deviation of egg number were as follows by the length of females: 19+/-50 in 5.50~5.99 mm long, 734+/-1,597 in 6.00~6.49 mm long, 1,473+/-1,606 in 6.50-6.99 mm long, 1,530+/-2,055 in 7.00-7.49 mm long, 2,567+/-2,046 in 7.50-7.99 mm long, 5,598+/-2,470 in 8.00~8.49 mm long, 9,318+/-2,651 in 8.50~8.99 mm long, 10,678+/-2,892 in 9.00~9.49 mm long and 13,323+/-1,778 in 9.50~9.90 mm long. The numbers of uterine eggs showed greater individual variation when the female lengths were in range of 5.5~8.0 mm. When the female length was longer than 9.0 mm, the egg numbers were over 10,000 in majority, and showed lesser individual variations. Above results suggested that the egg production in female E. vermicularis began in 28-32 days after infection and that in early stages, the egg production varied by individual worms, but in gravid females longer than 9.0 mm at last deposited 10,000 to 16,000 eggs in their uterus with the least individual variations.

Journal Article↗
PubMed1986

[The egg detection rates of Enterobius vermicularis among school children in the various regions]

A total of 860 cellotape anal swab specimens from 326 school children of urban area, 243 of rura1 farm village and 291 of rural fishing village was submitted for Enterobius vermicularis egg detection from September through November 1985. Each specimen was collected in the morning. Among the total 860 children's submitting specimens, 316 (36.7 per cent) were positive for E. vermicularis eggs. Of the 326 children in the urban area, E. vermicularis eggs were detected in the 45 (13.8 per cent). This detection rate was lower significantly as compared with 143 (55.6 per cent) of 243 children in the farm village or 136 (46.7 per cent) of 291 children in the fishing village. The egg detection rate in the male children was lower remarkably than that in the female children.

Journal Article↗
PubMed1987

[Egg detection rates of Enterobius vermicularis in children]

The cello-tape anal swab specimens from 936 primary school children in Seoul, 308 primary school children in a rural area and 92 children in Nanjido, were examined for Enterobius vermicularis eggs. Out of 936 specimens from a primary school in Seoul, E. vermicularis eggs were detected in 114 specimens, the egg detection rate being 12.2 percent. In 308 specimens from a primary school in a rural area, 77 (25.0 percent) were positive for E. vermicularis eggs. Among 92 specimens from Nanjido children in Seoul, egg positive rate of E. vermicularis was 28.3 percent. The egg detection rate of primary school children in Seoul was significantly lower than that of primary school children in a rural area and of Nanjido children. The egg detection rate in boys was lower than that of girls. As the age of children increased, the egg detection rate decreased.

Journal Article↗
PubMed1988

[Recent patterns of Enterobius vermicularis infection in some school children, Korea]

To investigate the infection status of Enterobius vermicularis the author tried surveys by scotch-tape anal swap on school-children and household environmental factors considered to have influences on the infection were analyzed by an inquiry method with questionnaire. The survey was carried out in October 1986 and 1988 in urban and suburban areas and the results could summarized as follow: The egg positive rate in anal swab was 16.0 per cent (male 14.5 per cent, female 17.6 per cent) out of 2,156 school-children and higher in female group. The egg positive rate in suburban school-children (17.5 per cent out of 1,305 children of two primary school)was a little higher than that of urban school-children(13.6 per cent out of 851 children of one primary schools). The questionnaire analysis on environmental factors showed some significant relations between the egg positive rate and such factors as the number of brothers and sisters, householder's occupation, and avalibility of childroom or bathroom. The result indicate that, although enterobiasis in school-children has shown decreasing tendency in Korea, it is still considerably high in some urban and suburban areas.

Journal Article↗
PubMed1991

[Prevalence of Enterobius vermicularis infection and preventive effects of mass treatment among children in rural and urban areas, and children in orphanages].

An epidemiological study and mass treatments of Enterobius vermicularis infection among children near Wonju area of Kangwon province were carried out. The children were divided into 4 groups according to their residing localities; children in the mountainous area, rural area, urban area and in orphanage. They were examined by adhesive cellotape anal swab technique, and egg positive rates were obtained. The rates of egg reduction and re-infection rates after repeated mass treatments were also observed. The results obtained were as follows: 1. The overall egg positive rate of E. vermicularis in the first screening was 19.9% (251 out of 1,262 examinees; 19.7% in males and 20.1% in females). The positive rates were 13.0% in the mountainous area, 11.9% in the rural area, 15.1% in the urban (medium-sized) area and 61.9% in orphanages. 2. The highest positive rates were observed in the kindergarten children, and 1st and 2nd grade children of primary schools (26.2-32.2%), and the lowest rate (13.6%) in 6-year grade children of primary schools. 3. Cumulative detection rates from 3 repeated anal swabs at 4-5 days interval were higher (70.8%) than those from single anal swabs (50.0-59.2%). 4. Out of the examinees who showed the highest cumulative positive rate (70.8%), about 39.2% were consecutively positive in 3 anal swabs. Among different groups of children, the higher the total egg detection rates (87.5%), the higher the consecutive positive rates (71.9%). 5. A total of 2,609 (male: female = 1:12.4) worms were collected from 17 egg-positive cases treated with anthelmintics. The mean number of worms per child was 153 (range: 4-824).(ABSTRACT TRUNCATED AT 250 WORDS)

Child↗
PubMed2001

Infection rates of Enterobius vermicularis and Clonorchis sinensis of primary school children in Hamyang-gun, Gyeongsangnam-do (province), Korea.

The egg positive rate of Enterobius vermicularis and Clonorchis sinensis of school children in the rural area was studied in Hamyang-gun, Gyeongsangnam-do in Korea. Cellotape anal swab and formalin ether concentration methods were performed one time to 720 primary school children. The total egg positive rate of E. vermicularis was 12.6% in two schools (Baekjeon and Wiseong). In the Baekjeon and Wiseong primary school, the egg positive rate of E. vermicularis was 4.6% and 13.4%, respectively. Pinworm egg positive rate was 17.6% in the lower grades (1st, 2nd and 3rd), and 7.7% in higher grades (4th, 5th and 6th). The total egg positive rate of male and female was 12.6% and 12.7%, respectively. The egg positive rate of C. sinensis of Baekjeon and Wiseong primary school was 1.5% and 0.46%, respectively. The total egg positive rate of C. sinesis was 0.56%. This survey showed that continuous education and chemotherapy is necessary to treat and prevent reinfection of E. vermicularis. In the case of C. sinensis, health education for school children is recommended to prevent potential infection of adolescents.

Adolescent↗
PubMed2001

Enterobius vermicularis egg positive rates in primary school children in Gangwon-do (province), Korea.

A survey of the infection rate of Enterobius vermicularis among students in 4 primary schools located in Gangwon-do (Province) was done from May to June 2001. Among the 398 examinees, 39 (9.8%) were infected with E. vermicularis demonstrated by the adhesive cellotape anal swab method. The infection rates ranged from 8.3% to 11.8% among the four schools. The infection rate of males and females was 10.7% and 7.7% respectively. The first grade students showed the highest infection rate, 28.7%. The confirmed cases were treated with albendazole three times at an interval of 15 days. We were able to confirm that E. vermicularis infection is still prevalent among students in Gangwon-do, Korea.

Age Factors↗
PubMed1998

[A case of Enterobius vermicularis salpingitis].

Enterobius vermicularis peritonitis due to intestinal infection is a common entity described in the literature. We report here an unusual case of unilateral salpingitis associated with the parasite migration through the genital tract.

Adult↗
PubMed2002

Enterobius vermicularis infection among pre-school children in Karen hilltribe villages in Chiang Mai, Thailand.

We surveyed Karen hilltribe villages in the Mae Chaem District of Chiang Mai Province between April and May 2001. Two hundred and forty-nine pre-school children were selected by stratified sampling from 10 villages and were examined for Enterobius vermicularis eggs by the Scotch tape perianal examination technique. One hundred and thirteen (53 boys and 60 girls) were found to have E. vermicularis eggs, giving an overall infection rate of 45.38%. We were able to determine that E. vermicularis infection is prevalent among the children of these hilltribe villages.

Child↗
PubMed1992

Prevalence of Enterobius vermicularis amongst adults living in hostels by six successive day examination.

The prevalence of Enterobius vermicularis in four groups of adults, all trainee public health inspectors or public health nurses, aged 18-35 years and all living in hostels on campus was studied. The modified scotch tape technique was used and the subjects were taught to do the examination on themselves to detect the presence of eggs over a period of 6 successive mornings. Each was given an elaborately illustrated diagram on how and when to take the samples and given demonstration in groups. The samples were examined by trained people. Most of the subjects took samples on 6 consecutive days. Of the 119 subjects who returned samples, the overall prevalence of E. vermicularis was 9.2% and this was thought to be high for this particular age group. This was due to the higher prevalence (19.4%) in one group, whereas in the others the range was 3.5-8.0%. Based on the samples returned on the first day none of the subjects were detected as having the infection. After examination on 3 successive days (109 subjects) 10.1% were found to be infected (chi 2 = 10.704; d. f. = 1) and after examination on 6 successive days (72 subjects) 13.9% were found to be infected (chi 2 = 3.026; d. f. = 1). There was no significance between examination over 3 successive days and 6 consecutive days (chi 2 = 0.296; d. f. = 1). There was no difference in the prevalence between males and females.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1989

The prevalence of Enterobius vermicularis amongst primary school children in Pulau Ketam, Selangor--1988.

A survey was conducted to investigate the prevalence of Enterobius vermicularis in 1352 Chinese children between the ages of 6-12 years from the three National Type Chinese Primary Schools in Pulau Ketam in 1988, using the scotch-tape technique on three successive days. The overall prevalence was high (56.88%). The prevalence in Sin Bin School was significantly lower (50.86%) compared to the other two schools (56.60% and 61.04%). Prevalence was significantly higher amongst the 6-7 years age group (61.61%-70.18%) compared to other age groups (47.9%-59.29%). There was no difference in the prevalence between the boys and girls being 56.15% and 57.55% respectively.

Child↗
PubMed1985

Enterobius vermicularis and acute appendicitis.

The relationship between Enterobius vermicularis and acute appendicitis has been discussed for more than 80 years. The latest histological examinations show that the parasites do invade the wall of the vermiform appendix, and related to these are inflammatory reactions. This invasion causes the symptoms that lead to appendectomy. A case report of a patient with symptoms of acute appendicitis and a histological finding of intramural parasites is presented.

Acute Disease↗
PubMedDate not supplied

[Vulvar granuloma due to Enterobius vermicularis (author's transl)].

The authors report a case of casual discovery of a enterobiasic vulvar granuloma arising on the left labia. This woman, living in Lille (France), 70 years had been treated by surgery and roentgentherapy for a well differentiated squamous carcinoma of the vulva. They consider the question of the genital localisation of Enterobius vermicularis in women and discuss the pathogenic hypothesis.

Aged↗