• 한국버섯학회지
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• 제17권3호
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• pp.93-98
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• 2019

We investigated the correlation between density of air and the infection rate of airborne microorganisms in mushroom cultivation facilities and found that the correlation was low in places where the infection rate during cultivation was less than 1%. The farms with an infection rate of 2~5% showed a high infection rate in the inoculation room in spring and summer seasons, and in the incubation room in autumn, and the farms with an infection rate of more than 6% showed infection in all the rooms regardless of the season. The farms where the Trichoderma sp. was investigated at the time of the mushroom cultivation showed the highest infection rates of 3.17%, 2.74%, and 2.64% in summer, spring, and autumn, respectively. The farms infected with Neurospora tetrasperma showed a lesser rate of infection than the ones infected with Trichoderma sp., and the highest infection rate of 0.56% was observed in summer. Based on these results, the type of infection could be classified into five groups, where type I was farms where the infection rate is less than 1% in all seasons. Three farms belonged to this type, and the infection rate in this type was lower than that in the other types.

• 한국동물위생학회지
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• 제22권1호
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• pp.71-77
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• 1999

Research results on actual management situation of 16 goat farms and internal parasite infection of 155 goats from January to November in 1997 in southern Kyoungnam area were as follows ; 1. An average number of goats was 93. Among them, 81% were farming the goat as avocation with the income rate less then 50%, Eight-four percent of farms terminated the parasites more than twice a year, and the survey showed the black goats had a high digestive and respiratory disease infection rate. 2. The internal parasite infection rate of the black goat was 96.8% , the goats were infected with 13 types of parasites. Of them, Emeria sp was 87.1%, Ostertagia sp 55.5%, Paraphistanum sp 45.8%, and Moniezia expansa 20%, respectively. 3. On the survey of multiple infection rate, both double and triple infection were 19.4%, more than septuple-infection 15,5%, single infection 13.4%, quintuple infection 12.3 n, sextuple infection 9.0% and quadruple infection 7.7%, respectively. 4. Look over on seasonal infection rate, higher in fall and lower in winter. Especially, Paramishitom sp was higher in summer and winter, both Moniezia expansan and Bonaostom sp were higher in summer. 5. Research on the infection rate of parasites termination period revealed less-than-1-month period had 10-30 infection rate, the infection rate has increased sharply since 3 months passed after the goats were treated with parasite-cid.

• 한국임상수의학회지
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• 제21권2호
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• pp.161-167
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• 2004

The present study was conducted to investigate the prevalence of Eimeria infection in 1,300 slaughtered chickens from 130 farms in Gyeongnam, Jeonnam, Jeonbuk, Gyeongbuk and Chungnam during the period from October 2002 to August 2003. The results obtained are summarized as follows: 1. The prevalence of Eimeria infection in 130 chicken farms was 76.9% and Eimeria infection rates of Gyeongnam, Jeonbuk, Gyeongbuk, Jeonnam and Chungnam were 80%, 75%, 70%, 42.9%, respectively. That of Tongyoung was the highest infection(94.4%) than others districts in the Gyeongnam. 2. The prevalence of oocysts infection level in 1,300 slaughtered chickens from 5 districts was 33.4% and that of Jeonbuk was the highest rate(42%) and Gyeongbuk has the lowest rate(20%). Prevalence of OPG level of slaughtered chicken in Tongyoung was the highest rate(42.8%) in Gyeongnam. 3, Mixed infection rate of over types 2 was 79% and triple infection was shown the highest infection(33%) among the infection types. 4. Kinds of E. spp. were E. acerulina, E. mivati, E. necatrix, E. maxima, and E. tenella. E. tenella has the highest infection rate(78%) and E. necatrix has the lowest infection rate(36%) among the Eimeria spp. 5. The monthly prevalence of Eimeria infection was shown higher in July(94.4%) compared with other months and Jun was shown lower(57.9%). But, level of OPG was shown higher in summer season(July, August; over 40%) than that of winter season(January, February; 23.1%, 16%).

• 한국어병학회지
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• 제8권1호
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• pp.23-30
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• 1995

1980~1982 년에 서해안 금강 하구산 바지락과 맛조개의 생식소내에 기생하는 흡충류의 유충인 Cercaria tapidis 와 Cercaria harengulae 의 기생율을 보고 한 후 동지역에서 13~14 년이 경과한 1994~1995 년 1 월까지 바지락과 맛조개에서 흡충류 유충의 기생율 변동 상황을 조사하였다. 먼저 바지락에 기생한 Cercaria tapidis 는 년평균 기생율이 1981 년의 5.7% 보다 2.4 배가 많은 14.0% 로 증가하였고, 월 기생율이 가장 높았던 달은 10 월의 32.0% 로 1981 년 12 월의 23.3% 보다 훨씬 높은 기생율을 나타냈다. 또 바지락에서의 Cercaria harengulae 의 년평균 기생율은 1980 년의 5.0% 보다 감소한 2.3% 이었으며, 월 기생율이 가장 높았던 1994 년 5 월의 6.7% 는 1980 년 3 월의 19.0% 보다 훨씬 감소된 기생율이었다. 맛조개에서의 Cercaria harengulae 의 년평균 기생율은 1981~1982 년의 10.2% 보다 감소된 6.9% 이었고, 월 최고 기생율도 1981 년에는 8 월에 23.4% 이었으나, 1994 년에는 4 월의 13.3% 로 감소 되었다. 또 Cercaria tapidis 는 1980 년 조사시와 같이 크기가 클수록 기생율이 높았으나, Cercaria harengulae 는 오히려 각장이 작을수록 기생율이 높아지는 경향을 나타냈다.

• 한국치위생학회지
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• 제15권3호
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• pp.363-369
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• 2015

Objectives: The purpose of this study is to investigate the cognition and practice of infection control in the dental hygienists. Methods: A self-reported questionnaire was completed by 220 dental hygienists in Busan and Gyeongnam from August 1 to 31, 2014. The questionnaire was adapted from Nam. The questionnaire consisted of four questions of the general characteristics of the subjects, two questions of infection control factors, four questions of clinic environment, 50 questions of awareness of infection control, and 50 questions of infection control practice. Cronbach's alpha in the awareness of infection control was 0.958 and that in infection control practice was 0.950. Results: The dental hygienists in the large scale hospitals tended to have higher score of cognition and practice of infection control thatn those in the small scale hospitals(p<0.001). Small scale hospitals tended to have lower infection rate than the large scale hospitals. The education for the infection control guideline reduced the infection prevalence rate. Conclusions: In order to reduce the infection prevalence rate, it is necessary to educate the dental hygienists continuously and to provide the infection control guideline to the dental clinics.

• 한국농촌간호학회지
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• 제2권1호
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• pp.33-42
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• 2007

Purpose: This study was done to determine the extent of Clonorchis sinensis infections as well as other parasitic infections and to determine the growth rate. Method: Analyzed test results were from 1,050 bowel samples taken at 3 public health subcenters located in Muju, North Jeolla Province during February and March 2007. Result: The results are summarized as follows; The egg positive rate by stool examination was 4.3%. Ascaris lumbricoides, Enterobius vermicularis, Clonorchis sinensis, Trichuris trichiura, Metagonimus, Paragonimus were detected. No one was infected with multiple parasites. Infection rate for Clonorchis sinensis was 3.5%. Statistical correlation to Clonorchis sinensis infection rate was as follows; Gender (p=0.001), Age (p=0.005), Proximity to a river (p<0.000), Drinking (p<0.000), Smoking (p=0.009), Cooking of freshwater fish (p<0.000), Confidence in subjective health status (p=0.032), Family history of infection (p=0.005), No significant correlation was found between Clonorchis sinensis infection rate and duration of stay (p=0.809) in the agricultural communities or between Clonorchis sinensis infection and knowledge of Clonorchis sinensis (p=0.113). Conclusion: The results of this survey show that there is a need to develop a program to test the condition of Clonorchis Sinensis infection and its growth rate in residents of rural communities.

• 한국환경보건학회지
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• 제3권1호
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• pp.22-26
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• 1976

Korea Parasite Eradication Association alleged in its seasonal spring report in 1975 that 36.8 percent of primary, middle and high school students in Seoul area are infected with parasites. Such a high rate of infection is a result of having used raw excrement for manure. Soil is, therefore, to a large extent infected with parasite eggs. In order to present helpful reference materials for preventing parasite infection in the area where human feces have been used for manure, soil in Seoul area and the suburban districts is sampled at random and then the rate of infection in various areas and the variation of infection rate in the same area are studied. The results are as follows 1) The parasite infection rates the according to districts are, Sootaik-ri 39.9%, Chamsil-dong14.2%, Songpa-dong 13.2%, Sageun-dong 12.8% Chayang-dong 11.4%, Sungsoo-dong 8.5%. The above figures show that the rate becomes higher as the area is farther from the urban and residential districts and nearer to the rural area. 2) The rates of detected parasites according to their kinds are as follows Ascaridae 55.9%, Ancylostomatidae 19.9%, Trichocephalus 13.5%, Trichostrongylus 5.7%, Tenia 3.9%, Enterobius 1.1% 3) The monthly variation of infection rate in the same districts, in the case of Sageun-dong, is, August 25.7%, July 18.9%, June 16.2%, September 15.3% April 12.6%, May 11.3%. The above shows that the infection rate of soil is comparatively higher in the summer season.

• Parasites, Hosts and Diseases
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• 제38권3호
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• pp.183-185
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• 2000

To determine the status of infection caused by intestinal parasites among children and adolescents living in Legaspi city, the Philippines, we performed a small survey by fecal examination for helminth ova and protozoan cysts with formalin-ether concentration method. Of the 64 examinees, the infection rate was 78.1%. The infection rates of primary school children, preschool children and adolescents were 95.5%, 64.7% and 87.5%, respectively. The infection rate in urban areas was 56%, and 92.3% in rural areas. The infection rates were 51% with Trichuris trichiura, 40% with Ascaris lumbricoides, 23.4% with hookworm, 15.6% with Iodamoeba butschlii, 14.1% with Endolinax nana, 9.4% with Entamoeba coli and 7.8% with Giardia lamblia. There were 33 cases with multiple infection (51.6%). Mixed infection with more than 3 parasites was observed in 15 cases, all of them being children and adolescents living in rural areas. By this survey, it was conjectured that helminthic infection is prevalent among children and adolescents in Legaspi, Philippines. To determine the status of infection caused by intestinal parasites among children and adolescents living in Legaspi city, the Philippines, we performed a small survey by fecal examination for helminth ova and protozoan cysts with formalin-ether concentration method. Of the 64 examinees, the infection rate was 78.1%. The infection rates of primary school children, preschool children and adolescents were 95.5%, 64.7% and 87.5%, respectively. The infection rate in urban areas was 56%, and 92.3% in rural areas. The infection rates were 51% with Trichuris trichiura, 40% with Ascaris lumbricoides, 23.4% with hookworm, 15.6% with Iodamoeba butschlii, 14.1% with Endolinax nana, 9.4% with Entamoeba coli and 7.8% with Giardia lamblia. There were 33 cases with multiple infection (51.6%). Mixed infection with more than 3 parasites was observed in 15 cases, all of them being children and adolescents living in rural areas. By this survey, it was conjectured that helminthic infection is prevalent among children and adolescents in Legaspi, Philippines.

• 한국치위생학회지
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• 제20권5호
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• pp.645-653
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• 2020

Objectives: The purpose of this study is to identify the difference between the awareness and reuser rate of infection control t for disposable dental care supplies (DDCS) according to general characteristics and infection management-related characteristics. Methods: A questionnaire was used for 277 dental hygienists to check the general characteristics, infection management-related characteristics, awareness of infection control disposable dental care products, syringe needle, prophylaxis cup, prophylaxis brush, plastic saliva ejector, orthodontic bracket, and gloves reuse rate. Results: The awareness of infection control for DDCS differed according to 'hospital type', 'average number of patients per day', 'presence or absence of infection control guidelines', and 'experience in infection management training in the last two years' (p<0.05). Reuser rates of disposable dental care products differed according to 'hospital type', 'average number of patients per day', 'presence or absence of infection control guidelines', and 'experience in infection management training in the last two years' (p<0.05). Conclusions: In order to manage infection of DDCS, the level of infection control system in the workplace is improved and support for related education is needed. In addition, guidelines and regulations on prohibition of reuse and classification criteria for various DDCS should be prepared.

• 식물병과 농업
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• 제1권1호
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• pp.30-36
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• 1995

Infection rate of witches'-broom disease (WB) was observed yearly in transplanted jujube seedlings for 7 years. Seedlings of‘Hongan’grafted either on the rootstock from seed (RS) or on the rootstock from rooting (RR) were planted in separate farms. Occurrence of the disease was determined 4 years after transplanting with the witches'-broom symptom. Only 1 seedling of RS was infected with WB, while 56 seedlings of RR showed WB. Yearly infection rates of WB were observed in several varieties of jujube including‘Boeun’,‘Keumsung’,‘Moodeung’,‘Bokjo’,‘Koori’(10 trees for each in Cheongjoo), and‘Hongan’(165 trees in Boeun). In most varieties, WB first appeared in the third year from transplanting, and in the seventh year, more than 80% of the total tree showed WB. The yearly infection rate of newly infected trees was almost. stable during the first years. However, the ratio sharply increased from the sixth year. The accumulated infection rate of WB increased double, year by year from the third to seventh year. Between Cheongjoo and Boeun, no difference in infection rates was found.