Osong Public Health and Research Perspectives

Brief Report

A low risk of nosocomial transmission of subclinical tuberculosis to neonates in a postpartum care center under COVID-19 control measures: In Kyoung Kim, So Jung Kim, Kyoung Hee Bae, Mi Young Kim, Ji Eun Oh, Mi Gyeong Lee, Young Ae Kang, Jin Su Song; Osong Public Health Res Perspect. 2022;13(6):448-452. Published online December 16, 2022; DOI: https://doi.org/10.24171/j.phrp.2022.0235

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Abstract PDF: We report the results of investigating and managing a tuberculosis (TB) exposure in apostpartum care center. Among the contacts exposed to a nursing assistant with subclinical TB,5 of 44 neonates (11.4%) had positive tuberculin skin tests (TSTs) at 3 months of age, and all theTST-positive neonates received the Bacille Calmette-Guérin vaccination. Seven of 28 healthcareworkers (25.0%) and 1 of 3 household contacts (33.3%) were positive in the initial or repeatedinterferon-gamma release assay. None of the contacts developed TB disease during the studyperiod. Annual TB examinations of healthcare personnel at a postpartum care center under theTuberculosis Prevention Act in South Korea enabled the early detection of subclinical TB, whichreduced the risk of transmission to neonates under strict coronavirus disease 2019 preventionmeasures.

Original Articles

Estimating Tuberculin Skin Test Reactions among Children and Teenagers Who Received the Bacillus Calmette-Guerin Vaccination at Birth: A Meta-analysis: Mohammad Sadegh Rezai, Siavosh Abedi, Mahdi Afshari, Mahmood Moosazadeh; Osong Public Health Res Perspect. 2017;8(1):3-10. Published online February 28, 2017; DOI: https://doi.org/10.24171/j.phrp.2017.8.1.02

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Abstract PDF

Objectives

Tuberculin skin reaction size is one indicator of bacillus Calmette-Guérin (BCG) vaccine efficacy and a way to diagnose latent infection. Several primary studies have examined this issue. Combining the results of these studies using a meta-analysis will provide reliable evidence regarding this indicator for policymakers. This study aimed to estimate the total frequency of different tuberculin skin test reactions among Iranian children and teenagers who received the BCG vaccination at birth.

Methods

National and international databanks were searched using relevant keywords. After the search strategy was restricted and duplicates were excluded, the titles and abstracts of the remaining papers were screened. All included studies included healthy children who received the BCG vaccine without confirmed tuberculosis exposure. Heterogeneity of the results was assessed using the Cochrane test and I² index showed the random effects model as the best model for estimating the pooled results.

Results

We combined the results of 14 primary studies including purified protein derivative reaction test measures of 26,281 Iranian children. The frequencies (95% confidence intervals) of the reactions were 8.5% (6.2–10.8) for patients with a reaction size ≥ 10 mm, 29.9% (22.3–37.4) for a reaction size of 5–9 mm, and 60% (48.9–71.1) for a reaction size < 5 mm.

Conclusion

Our study showed that large numbers of Iranian children and teens have no positive BCG vaccine reaction and a considerable number of children have been exposed to Mycobacterium tuberculosis.

Citations

Citations to this article as recorded by

Comparison of Serum Immunoglobulin Levels and Lymphocyte Counts in Children with Lymphadenitis Following BCG Vaccination
Leila Barati, Arash Kalantari, Jalaladdin Sheikh, Fateme-Sadat Tabatabaee, Farshid Kompani, Maryam Najafinejad, Ahmad Sohrabi, Fatemeh Cheraghali
Iranian Journal of Pediatrics.2022;[Epub] CrossRef
Is latent tuberculosis infection challenging in Iranian health care workers? A systematic review and meta-analysis
Mohammad Hossein YektaKooshali, Farahnaz Movahedzadeh, Ali Alavi Foumani, Hoda Sabati, Alireza Jafari, HASNAIN SEYED EHTESHAM
PLOS ONE.2019; 14(10): e0223335. CrossRef

Results of Tuberculosis Contact Investigation in Congregate Settings in Korea, 2013: Yunhyung Kwon, So Jung Kim, Jieun Kim, Seol-yi Kim, Eun Mi Song, Eun Jung Lee, Yun Choi, Yejin Kim, Byoung ok Lim, Da Sul Kim, Duksun Choi, Hye Sung Kim, Ji Eun Park, Ji-eun Yun, Jin A. Park, Jong Rak Jung, Joo-kyoung Kim, Sang Hee Kang, Seo Yean Hong, Seung Jae Lee, Soo Jin Park, Sun Hwa Park, Sunhye Yoon, Yoonsun Kim, Yunjeong Choi, Yun Jeong Seo, Yul A Seo, Jiseon Park, Minhee Sung, Minjang Shin, Hyunjin Son, Yeonkyeng Lee, Unyeong Go, Geun-Yong Kwon; Osong Public Health Res Perspect. 2014;5(Suppl):S30-S36. Published online December 31, 2014; DOI: https://doi.org/10.1016/j.phrp.2014.10.010

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6 Crossref

Abstract PDF

Objectives
This study aimed to check the status of the contact investigation in congregate settings to eradicate tuberculosis (TB) in the Republic of Korea.
Methods
The “Integrated System for Disease and Public Health Management” is used for care and follow-up for patients and contacts of TB. We downloaded data for contact investigations conducted from January to December 2013.
Results
A total of 1,200 contact investigations in congregate settings were carried out by 25 field investigators in 2013. We performed the status of contact investigation, TB, and LTBI rate by age, accept rate of LTBI treatment, and complete rate of LTBI treatment during 2013. A total of 1,547 index TB patients, 149,166 contacts, and 259 additional TB patients were found through the investigation. Kindergartens showed the highest LTBI rate, 19.8%, among educational facilities. The second highest was in elementary schools and the subtotal LTBI rate of educational facilities was 7.8%. Social welfare/correctional facilities and workplaces showed relatively high LTBI rates of 23.8% and 23.6%, respectively. By age, individuals >35 years showed the highest LTBI rate, followed by those aged 0–4 years, 30–34 years, and 5–9 years, with rates of 18.1%, 16.4%, and 15.4% respectively. When comparing the tuberculin skin test (TST) positive conversion ratio by facility, middle school and high school were relatively high compared to the others. The accept rate of LTBI treatment in the workplace was lowest at 63% and the complete rate in elementary schools was lowest at 76.5%.
Conclusion
TB contact investigation is considered as a meaningful strategy for preventing TB outbreaks in congregate settings and decreasing the prevalence of TB in young people. Results of this study could be used to establish the LTBI management policy.

Citations

Citations to this article as recorded by

Latent Tuberculosis Cascade of Care Among Healthcare Workers: A Nationwide Cohort Analysis in Korea Between 2017 and 2018
Jinsoo Min, Hyung Woo Kim, Joon Young Choi, Ah Young Shin, Ji Young Kang, Yunhee Lee, Jun-Pyo Myong, Hyunsuk Jeong, Sanghyuk Bae, Hyeon-Kyoung Koo, Sung-Soon Lee, Jae Seuk Park, Hyeon Woo Yim, Ju Sang Kim
Journal of Korean Medical Science.2022;[Epub] CrossRef
Risk of active tuberculosis development in contacts exposed to infectious tuberculosis in congregate settings in Korea
Shin Young Park, Sunmi Han, Young-Man Kim, Jieun Kim, Sodam Lee, Jiyeon Yang, Un-Na Kim, Mi-sun Park
Scientific Reports.2020;[Epub] CrossRef
The risk of active tuberculosis among individuals living in tuberculosis-affected households in the Republic of Korea, 2015
Jiyeon Yang, Sodam Lee, Suhyeon Oh, Sunmi Han, Shin Young Park, Youngman Kim, Jieun Kim, Mi-sun Park, Philip C. Hill
PLOS ONE.2019; 14(12): e0225744. CrossRef
The Infectivity of Pulmonary Tuberculosis in Korean Army Units: Evidence from Outbreak Investigations
Chang-gyo Yoon, Dong Yoon Kang, Jaehun Jung, Soo Yon Oh, Jin Beom Lee, Mi-Hyun Kim, Younsuk Seo, Hee-Jin Kim
Tuberculosis and Respiratory Diseases.2019; 82(4): 298. CrossRef
Tuberculosis prevention and care in Korea: Evolution of policy and practice
Unyeong Go, Misun Park, Un-Na Kim, Sodam Lee, Sunmi Han, Joosun Lee, Jiyeon Yang, Jieun Kim, Shinyoung Park, Youngman Kim, Hyosoon Yoo, Jeongok Cha, Wonseo Park, Haeyoung Kang, Hwon Kim, Guri Park, Minjung Kim, Ok Park, Hyunjin Son, Enhi Cho, Kyoungin Na,
Journal of Clinical Tuberculosis and Other Mycobac.2018; 11: 28. CrossRef
The Prevalence and Risk Factors of Latent Tuberculosis Infection among Health Care Workers Working in a Tertiary Hospital in South Korea
Jae Seuk Park
Tuberculosis and Respiratory Diseases.2018; 81(4): 274. CrossRef

The Usefulness of the Tuberculosis Skin Test and the Interferon-gamma Release Assay in the Diagnosis of Latent Tuberculosis Infection in South Korea: Ju Young Jang, In Won Park, Byoung Whui Choi, Jae Chol Choi; Osong Public Health Res Perspect. 2014;5(Suppl):S18-S23. Published online December 31, 2014; DOI: https://doi.org/10.1016/j.phrp.2014.10.009

3,130 View
23 Download
3 Crossref

Abstract PDF

Objectives
South Koreans receive the bacillus Calmette-Guerin (BCG) vaccination, which influence the result of the tuberculin skin test (TST); however, only a few studies have described the usefulness of the TST and interferon-γ release assay (IGRA) for diagnosing latent TB infection (LTBI). Therefore, our aim was to determine the usefulness of the TST and IGRA for diagnosing LTBI in a household contacts investigation.
Methods
We reviewed the 329 household contacts who visited Chung-Ang University Hospital (Seoul, Korea) from May 1, 2011 to February 28, 2014. To evaluate the effectiveness of TST and IGRA for the diagnosis of LTBI, we examined the concordance rate between the two tests, based on age. We also evaluated the risk factors for LTBI.
Results
The concordance rate between the two tests in individuals 0–24 years, 25–54 years, and over 55 years were 82.6% (κ = 0.64, p < 0.01), 68.9% (κ = 0.40, p < 0.01), and 68.4% (κ = 0.35, p < 0.01), respectively. The ratio of positive TST to negative IGRA was higher in individuals 25–44 years old, whereas the ratio of negative TST to positive IGRA was higher in individuals older than 55 years old. Based on the TST, the risk factor for LTBI was a cavity (p < 0.01). When using IGRA, the risk factors were contact time (p = 0.04) and age over 55 years old (p = 0.02).
Conclusion
The concordance rate between TST and IGRA was not good after the age of 25 years. The IGRA test reflects the known risk factors more exactly.

Citations

Citations to this article as recorded by

Household tuberculosis contact investigation in a tuberculosis-prevalent country
Jung Seop Eom, Insu Kim, Won-Young Kim, Eun-Jung Jo, Jeongha Mok, Mi-Hyun Kim, Kwangha Lee, Ki Uk Kim, Hye-Kyung Park, Min Ki Lee
Medicine.2018; 97(3): e9681. CrossRef
QuantiFERON-TB Gold In-tube test for the diagnosis of active and latent tuberculosis in selected health facilities of Addis Ababa, Ethiopia
Selam Niguse, Kassu Desta, Gebremdihin Gebremichael, Atsebeha Gebrezgeaxier, Mulluwork Getahun, Desta Kassa
BMC Research Notes.2018;[Epub] CrossRef
Predictors for false-negative QuantiFERON-TB Gold assay results in patients with extrapulmonary tuberculosis
Youn Jeong Kim, Ji Young Kang, Sang Il Kim, Mee Soo Chang, Yang Ree Kim, Yeon Joon Park
BMC Infectious Diseases.2018;[Epub] CrossRef

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