Abstract
BackgroundChina is a country with a high burden of pulmonary tuberculosis (PTB). Chongqing is in the southwest of China, where the notification rate of PTB ranks tenth in China. This study analyzed the temporal and spatial distribution characteristics of PTB in Chongqing in order to improve TB control measures.MethodsA spatial-temporal analysis has been performed based on the data of PTB from 2011 to 2018, which was extracted from the National Surveillance System. The effect of TB control was measured by variation trend of pathogenic positive PTB notification rate and total TB notification rate. Time series, spatial autonomic correlation and spatial-temporal scanning methods were used to identify the temporal trends and spatial patterns at county level.ResultsA total of 188,528 cases were included in this study. A downward trend was observed in PTB between 2011 and 2018 in Chongqing. The peak of PTB notification occurred in late winter and early spring annually. By calculating the value of Global Moran’s I and Local Getis’s Gi*, we found that PTB was spatially clustered and some significant hot spots were detected in the southeast and northeast of Chongqing. One most likely cluster and three secondary clusters were identified by Kulldorff’s scan spatial-temporal Statistic.ConclusionsThis study identified seasonal patterns and spatial-temporal clusters of PTB cases in Chongqing. Priorities should be given to southeast and northeast of Chongqing for better TB control.
Highlights
China is a country with a high burden of pulmonary tuberculosis (PTB)
Data collection and management The Chongqing TB surveillance data from January 2011 to December 2018 was extracted from the National Surveillance System for Notifiable Infectious Disease, which is established and operated by the Chinese Center for Disease Control and Prevention (CCDC)
Descriptive analysis of PTB cases A total of 188,528 PTB cases were notified in Chongqing from 2011 to 2018
Summary
China is a country with a high burden of pulmonary tuberculosis (PTB). Chongqing is in the southwest of China, where the notification rate of PTB ranks tenth in China. This study analyzed the temporal and spatial distribution characteristics of PTB in Chongqing in order to improve TB control measures. Tuberculosis (TB) is a chronic infectious disease caused by Mycobacterium tuberculosis (MTB). It is one of the top 10 causes of death [1]. After more than 10 y efforts, China has reached the 2005 global tuberculosis control targets [4]. It is the only country with a high TB burden that has made the achievements [5]. TB remains a major public health problem in China, especially in the relatively poor northern and western areas [6, 7]
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