• Users Online: 259
  • Home
  • Print this page
  • Email this page
ORIGINAL ARTICLE
Year : 2022  |  Volume : 11  |  Issue : 3  |  Page : 287-292

Analysis of a tuberculosis outbreak in an office: Hokkaido, Japan, 2019–2020


1 Infectious Disease Control Section, Sapporo City Health Office, Sapporo, Hokkaido, Japan
2 Infectious Disease Control Section, Sapporo City Health Office; Sapporo City Institute of Public Health, Sapporo, Hokkaido, Japan
3 Bureau of Health and Welfare, Sapporo City Government, Sapporo, Hokkaido, Japan
4 Division of Technical Assistance to National Tuberculosis Programmes, Research Institute of Tuberculosis, Tokyo, Japan

Correspondence Address:
Masaki Ota
No. 3-1-24, Matsuyama, Kiyose City, Tokyo 2048533
Japan
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijmy.ijmy_111_22

Rights and Permissions

Background: In August 2018, a male worker (Pt1) in an office was diagnosed with smear-positive pulmonary tuberculosis (TB). This study aims to characterize the cases found in the TB outbreak in the office. Methods: The risks of TB disease or infection were compared among the staff members by seating locations. Results: A total of 116 current and ex-staff members were investigated, among whom 13 patients with active TB, including Pt1, and 20 with latent TB infection were found by the end of 2020. One-third of the seating groups located at one end of the office that Pt1 belonged to had the highest risk of TB disease (30.8%, 95% confidence interval [CI]: 14.3%–51.8%) and infection (61.5%, 95% CI: 40.6%–79.8%) with a high relative risk of TB infection (6.2, 95% CI: 2.0–18.8) compared to another one-third of the seating groups at the other end of the office that had the lowest risk of active TB (0%, 95% CI: 0%–11.6%) and TB infection (10.0%, 95% CI: 2.1%–26.5%). Conclusion: The seating groups that Pt1 belonged to had the highest risk of TB disease and infection because the staff members in the groups were exposed to the air containing TB bacilli from Pt1. Local health offices should initiate active case finding using chest X-rays as soon as they are notified of a sputum smear-positive TB case if the delay of the diagnosis is longer than three months.


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed184    
    Printed4    
    Emailed0    
    PDF Downloaded27    
    Comments [Add]    

Recommend this journal