• 대한바이러스학회지
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• 제28권4호
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• pp.377-382
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• 1998

Hemorrhagic fever with renal syndrome (HFRS), scrub typhus, murine typhus and leptospirosis have been the principal acute febrile diseases in Korea. To evaluate the seroepidemiologic patterns of acute febrile illness, sera collected from 2,423 patients in 1996 were examined for antibodies against Hantaan virus, Orientia tsutsugamushi, Rickettsia typhi, and Borrelia burgdorferi by indirect immunofluorescent antibody technique (IFA) and macroscopic agglutination test for Leptospira interogans. Seropositive cases against Otsutsugamushi, Rickettsia typhi, Leptospira interogans and Hantaan virus were 192 (7.9%), 193 (8.0%), 12 (0.5%) and 324 (13.4%), respectively. Male was more affected in HFRS and murine typhus contrasting to scrub typhus and leptospirosis in female. Most positive cases occurred during October and November for scrub typhus, and during November and December for HFRS. These results showed similar patterns with previous epidemical data for recent couple of years, and possibly implied no significant changes occurred in ecologic situations for acute febrile diseases in Korea.

• Journal of Preventive Medicine and Public Health
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• 제30권1호
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• pp.17-29
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• 1997

To estimate the prevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) infection and to determine associated risk factors, a population-based seroepidemiologic study was carried out. In 1993, a health examination survey of the population was carried out in rural area known to have a high incidence of liver cancer. The study population were those who volunteered to participate in a health survey over 10 years of age. Examinees were interviewed by specially trained staffs. Sera from 1,033 study subjects were tested for hepatitis B surface antigen (HBsAg) by .everse passive hemagglutinin (RPHA) estimation and for hepatitis C virus antibody (anti-HCV) by 2nd generation passive hemagglutinin (PHA) estimation. The age and sex standardized prevalence of HBsAg was 6.3% which was similar to national average, but that of anti-HCV was 5.1% which was 4 to 5 times higher than that of blood donors or other health examinees in Korea. In a multivariate analysis, transfusion history, surgical operative history, and acupuncture history were not associated with HBsAg positivity. In contrast, acupuncture history (adjusted odds ratio[OR]=2.2 : 95% Confidence interval[CI] 1.0-4.7) and surgical operative history(adjusted OR=2.0 : 95% CI 1.0-4.1) were associated with anti-HCV positivity. The present study suggest that there is an highly endemic area of HCV infection in Korea and probably this endemicity is associated with a parenteral source of HCV infection other than blood transfusion.

• Parasites, Hosts and Diseases
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• 제32권2호
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• pp.85-92
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• 1994

스파르가눔 감염 환자에 대하여 혈청학적으로 특이항체검사를 실시할 경우 그 민감도와 특이도가 높다는 것은 이미 알려진 바와 같다. 그러므로 특이항체 양성율을 이용할 경우 무증상 정상인 집단이나 특정 집단에서의 스파르가눔 감염 상태를 간접적으로 관찰할 수 있다 이 연구는 우리나라 정상 성인 및 간질(간질) 환자의 혈청을 수집하고. 효소면역측정법으로 혈청내 항스파르가눔 항체. 항유구낭미충 항체 및 항폐흡충 항체가를 동시에 측정하고. 항스파르가눔 항체양성자 중 항유구낭미충 항체 및 항폐흡충 항체와 교차반응한 예를 제외하고 오로지 항스파르가눔 항체가만 양성범위인 사람을 양성으로 하는 방법으로 양성자를 조사하였다 1987년 2월부터 1990년 9월까지 중앙의대 부속병원. 한국건강관리협회 전국 각 지부 검사소 및 제주의료원에 신체검사를 목적으로 내원한 무증상 성인 850명의 혈청을 무작위로 선정하여 정상 성인 조사 대상자로 하였고 전국 장미회 108 개 지부중 28개 지부에 등록한 간질 환자중 무작위로 2,667명을 조사대상자로 선정하였다. 항스파르가눔 항체의 양성 반응을 흡광도 0.22또는 그 이상으로 하였을 때. 항체양성율은 정상 성인군에서 1.9% (1990년 전국 시도별 인구로 표준화하면 1.7%) 간질환자군에서 2.5% (표준화하였을 때 2.3%)이었다. 항체양성율은 남자에서 30세 이상 연령군에서 높아 환자 증례를 기초로 조사한 기존 역학조사 자료와 일치하였다. 시도별로는 강원도와 전라남도의 대상자에서 항체양성율이 높았고 특히 강원도의 대상자에서는 항체가(흡광도)가 매우 높은 양성자의 비율이 높았다. 항체양성율을 기초로 간질에 대한 스파르가눔 감염의 상대위험도(odds ratio(교차비)로 표현)는 1.32로서 스파르가눔 감염은 유구낭미충 감염 (교차비 1.94) 에 비하여 낮았다.

• Journal of Preventive Medicine and Public Health
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• 제40권4호
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• pp.285-290
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• 2007

Objectives : Cases of human brucellosis in Korea have recently increased due to the increasing incidence of bovine brucellosis. The authors conducted this study to elucidate the status of brucellosis through seroepidemiologic study. Methods : We selected our study population from a high risk group. We conducted a questionnaire survey and obtained blood samples to determine the seroprevalence of brucellosis antibodies for 10 days in February, 2005. The titers of brucellosis were measured by the combination of standard tube agglutination test (STA) and enzyme-linked immunosorbent assay (ELISA) test. Results : Our study subjects comprised 1,075 cases: 971 livestock workers, 51 veterinarians, and 53 artificial inseminators. In the STA test, 27 cases (2.5%) had titers of greater than or equal to 1:20. Of 1,068 cases (7 cases were excluded due to previous brucellosis), 7 cases of brucellosis were diagnosed with titers of 1:160, giving a seroprevalence of brucellosis of 0.66%. The seroprevalence in the male group was 0.95%, and that of livestock workers, veterinarians, and artificial inseminators was 0.52%, 4.17%, and 0.00%, respectively. The Spearman's correlation coefficient between the positive rate of bovine brucellosis per capita and household and human brucellosis was 0.806 and 0.744, respectively. The concordance rate between the Korea National Institute of Health and the Gyeongsangbuk-do Institute of Health and Environment by the STA and ELISA tests was 94.7% and 100.0%, respectively. Conclusions : The study results indicated in higher seroprevalence rate among veterinarians than among livestock workers and artificial inseminators. Because veterinarians may be exposed to this high risk, effective working guidelines for veterinarians to guard against brucellosis must be developed. Moreover, more extensive epidemiologic research for laboratory workers and meat handlers is needed.

• Parasites, Hosts and Diseases
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• 제40권4호
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• pp.177-180
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• 2002

Gangweon-do is known to be highly endemic area of sparganosis more than other provinces in Korea. A seroepidmiologic examination for the detection of anti-Spirometra erinacei plerocercoid IgG in serum was carried out in normal inhabitants in Hongcheon-gun, Gangweon-do. Sere were tested by enzyme-linked immunosrobent assay (ELISA) for the anti-sparganum antibodies. Positive rate for anti-sparganum antibody in 719 adults was 3.3%. Data of the questionnaire for 24 ELISA positive inhabitants revealed that 20 had a history of eating raw meat of snakes, 24 had a history of eating frogs, and 24 had a history of drinking stream water. Two positive cases had a past history of sparganosis. Two positive cases showed current symptoms of sparganosis. The data revealed that ELISA would be useful to find infected cases among normal inhabitants at sparganosis-endemic areas.

• Journal of Preventive Medicine and Public Health
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• 제54권5호
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• pp.370-375
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• 2021

Objectives: The number of cases of hepatitis A virus (HAV) infections has sharply increased in Korea, especially among young adults. In this study, an HAV outbreak in a facility for disabled people was investigated, and we found epidemiological differences both between 2 different generations and between generally abled and disabled groups. Methods: We analyzed the incubation period and attack rate of an HAV outbreak and investigated the prevalence of HAV antibodies among the staff and residents of a facility for the disabled. We performed a retrospective cohort study during the HAV outbreak, which lasted from February 8 to 25, 2019, including examinations of HAV antibody tests and post-exposure HAV vaccination for the staff or residents of the facility. Results: There were 9 confirmed cases in 2 staff members and 7 residents. Among 53 people (30 staff and 23 residents), except for the 9 confirmed cases and 1 staff member with a known history of HAV infection, HAV seroprevalence was seen in 16.7% of the staff under 40 years of age and 95.2% of those over 40 years of age, while the corresponding rates in the residents were 0.0% and 58.8%, respectively. Conclusions: This result implies that it is necessary to prioritize HAV vaccination for vulnerable groups and workers of residential care facilities.

• Parasites, Hosts and Diseases
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• 제34권4호
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• pp.233-238
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• 1996

이 연구에서는 경기도 양평군 및 광주군에 사는 임산부 899명을 대상으로 IgG-ELISA와 간접 latex 응집반응검사를 시행하여 톡소포자충에 대한 항체가를 측정하였다. IgG-ELISA에서는 0.25 이상을 양성기준으로 하였을 때 음성대조군 218명 중 4명이 양성(1.8%)인 반면 임산부에서는 39 명이 양성으로 검출되어 4.3%의 양성율을 보였다. 간접 latex 응집반응검사는 수의과학연구소에서 만든 킷트(LAT)를 사용하였는데 1:64 희석배수 이상을 양성으로 하였을 때 음성대조군은 모두 음성반응을 보였고 임산부에서는 7명(0.8%)이 양성을 보였다. 임산부중에서 1.8 이상의 반응을 보인 80명을 대상으로 일본제품인 Toxotest-MF를 적용시키고 1:32 이상을 양성의 기준으로 하였을 때 임산부 8명에서 양성반응을 보였다. LAT와 Toxotest-MT의 두 반응간의 일치율은 0.94(${\kappa}-index$ = 0.632. p < 0.01)로 높은 일치율(fair to good agreement)을 보였으므로 LAT는 톡소포자충증의 예비진단에 이용될 수 있을 것으로 생각된다.

• 대한미생물학회지
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• 제17권1호
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• pp.7-14
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• 1982

A model of induction of neoplasia by viruses has develpoed from experimental studies in animals and in cultured cells and oncogenic transformation of cells is the result of integration of viral genetic information into the cellular DNA. The evidence for these associations was derived primarily from seroepidemiologic investigation. However, data indicating that the relation between HSV-2 and cervical cancer fits the model derived from experimental animal studies are not yet sufficient to draw conclusion with regard to the etiologic role the virus in the development of the neoplasms. In other hand, the K562 tumor cell is highly susceptible target for natural killer cell lysis by the lymphocytes of human and murine periperal blood. The characteristics of this effector cell type has been investigated. A study on natural killer cell mediated cytotoxicity(NKMC) against $^{51}Cr$-K562 as target cell was studed in HSV-2 infected ICR mouse. We have studied for susceptibility of HSV-2 against mouse embryo fibroblast(MEF) cells and NKMC from HSV-2 infected mouse. The results obtained that the mouse embryo fibroblast cells culture, the number and size of the cells were markedly increased and formed a monolayers relatively rapid, and become complete monolayer sheet around 72 hrs. Duration of cytopathic effect on MEF cells was rapid by serial passing of HSV-2. The morphology of the HSV-2 infected cells appear to be mainly round, ovium, spindle form and some of them was forming large giant cells. The NKMC was decrease in mouse with HSV-2 and comparison between effector/target cells ratio as 25:1 and 50:1 respectively, the NKMC was found to be more significantly decreased than normal control we have concluded that the natural killer cell activity of the viral infected mouse was shown as a suppressed during the HSV-2 infection, day 7th and 14th.

• Parasites, Hosts and Diseases
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• 제37권2호
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• pp.109-115
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• 1999

The present study observed the variation of antigenicity of Pneumocystis carinii and serum IgG antibody reastion to the antigens from different localtities in Korea. Antigens of rat P,carinii and sera of inhabitants were collected at Chunchon, Chungju, Kwangju and Seoul during 1995-1996. Enzyme-Linked Immunosorbent Assay and immunoblot were used for immune reaction. Absorbance of 1,294 human sera ranged between 0.01and 0.93. Sera from Chunchon showed higher absorbances than those from other areas. Immunoblotting revealed IgG antibody reactions to 116,100, and 45-55 kDa antigenic bands of rat P.carinii, but the frequencies of positive reaction to individual bands were variable by localities. Total 62.6% reacted to 100kDa band and 32.0% to 45-55 kDa bands. For the reaction to 116kda, the reaction rate was 60.0% of the sera showed the reaction to 116kda band while 37.7% reacted to 100kda, the reaction rate was 60.0% to 82.6% by localities. It is found that the reaction rates of the human sera to rat P.carinii antigen are variable according to the localities. Also, the high molecular antigen of 116kDa of rat P.carinii is the most frequent antigenic band reaction to human sera.

• 미생물학회지
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• 제30권2호
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• pp.115-123
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• 1992

박쥐 총 453 수의 일본뇌염 바이러스에 대한 HI 항체가를 조사하였던 바 1 :10 이상 양성률은 453 수 중 335 수(74.0%) 로 높은 양성률을 보였고 성별 항체보유율은 수컷이 70.0%(237수 중 166 수) 이고 암컷이 78.2%(216수 중 169수) 로 암켓이 약간 높게 나타났다. 박쥐 종류별 일본뇌염 바이러스 (Japanese Encephalitis Virus, JEV) 에 대한 HI 항체 양성률을 조사한 바 관박쥐 (Rhinolophus ferrumeguinum) 는 75.0%(360 수 중 34 수) 양셩이고 안주애기박쥐(Verpertilio superrans) 는 87.5%(24 수 중 21 수) 가 향체가를 보였고 큰수염박쥐 (Myotis mystatinus) 도 수가 적어 비교가 어려우나 항체보유률은 83.3%(12 수 중 10 수)가 양성이었다. JEV(Nakayama strain)을 한국산 야생박쥐 뇌내에 감염시켜서 되염 바이러스가 박쥐 뇌내 세포에서 증식하는지 여부를 확인하였다. 박쥐 뇌세포에서 JEV 항원과 바이러스의 감염입자를 전자 현미경으로 확인하였다.