Related Experiment Video
Updated: Sep 14, 2025

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
Published on: September 5, 2017
Epidemiology and transmission dynamics of tuberculosis among internal migrants in Hangzhou: A retrospective analysis
Qingchun Li1, Zike Cheng2, Qinglin Cheng1
1Department for tuberculosis control and prevention, Hangzhou Center for Disease Control and Prevention(Hangzhou Health Supervision Institution), No.568, Mingshi Road, Shangcheng District, Hangzhou, Zhejiang Province, 310021, China.
Background:
Tuberculosis (TB) remains a critical public health challenge in China, particularly amid rapid urbanization and internal migration. This retrospective study analyzed the epidemiology and transmission dynamics of TB among internal migrants (IMTB) versus local residents (LRTB) in Hangzhou, China, from 2013 to 2022.
Methods:
Data from 47,659 pulmonary TB cases were extracted from the national Tuberculosis Information Management System.
Results:
IMTB accounted for 21.88 % of cases, with patients significantly younger (mean age 33.45 vs. 51.50 years, P < 0.0001) and fewer bacteriologically confirmed diagnoses (34.9 % vs. 41.8 %, P < 0.0001) compared to LRTB. Treatment success rates were higher among IMTB (95.0 % vs. 89.7 %, P < 0.0001). Spatial clustering of IMTB occurred in industrial districts, primarily originating from Anhui, Guizhou, and Jiangxi provinces.
Conclusion:
Migration-driven TB transmission highlights the need for adaptive control strategies in urbanizing settings.
More Related Videos
Related Concept Videos
Pulmonary Tuberculosis I
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Pulmonary Tuberculosis II
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Pulmonary Tuberculosis V
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the...
Pulmonary Tuberculosis IV
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Statistical Methods for Analyzing Epidemiological Data
Pulmonary Tuberculosis III
The first classification is based on the development of the disease, and it includes the following categories:

