We conducted a case-control study to investigate risk factors for multidrug-resistant tuberculosis (MDR TB) in the People's Republic of China. Genotyping analysis was used to estimate the percentage of cases from recent transmission among 100 MDR TB case-patients hospitalized during April 2007-July 2009. Molecular subtyping of isolates showed that 41% of MDR TB strains clustered. Beijing genoty...

SETTING Peru reports among the highest multidrug-resistant tuberculosis (MDR-TB) rates in the Americas, with a growing proportion in previously untreated tuberculosis (TB) cases. The identification of clusters of primary MDR-TB compared with drug-susceptible TB (DS-TB) could help prioritize interventions. OBJECTIVE To examine the clustering of primary MDR-TB case residences and their proximit...

SETTING Kazakhstan is a country with a low HIV/AIDS (human immunodeficiency virus/acquired immune-deficiency syndrome) burden, but a high prevalence of multidrug-resistant tuberculosis (MDR-TB). METHODS We describe the epidemiology of multidrug resistance and HIV among TB patients, using the 2007-2011 national electronic TB register. RESULTS HIV test results were available for 97.2% of TB p...

Detailed information on additional drug resistance patterns of multidrug-resistant tuberculosis (MDR-TB) is essential to build an effective treatment regimen; however, such data are scarce in Korea. We retrospectively analyzed the results of phenotypic drug susceptibility testing (DST) of culture confirmed-TB patients from January 2010 to December 2014 in 7 university hospitals in Korea. MDR-TB...

BACKGROUND Multidrug-resistant (MDR) and extensively drug-resistant (XDR) tuberculosis (TB) are global health problems. We sought to determine the characteristics, prevalence, and relative frequency of transmission of MDR and XDR TB in Shanghai, one of the largest cities in Asia. METHODS TB is diagnosed in district TB hospitals in Shanghai, China. Drug susceptibility testing for first-line dr...

Multidrug-resistant tuberculosis (MDR-TB) is an infectious disease caused by Mycobacterium which resistant to at least isoniazid and rifampicin. This a worldwide threat complicates the control of (TB). Long treatment duration, combination several drugs, adverse effects these drugs are factors that play role in poor outcomes MDR-TB patients. There have been many studies with repurposed improve o...

BACKGROUND Prior infection with one strain TB has been linked with diminished likelihood of re-infection by a new strain. This paper attempts to determine the role of declining prevalence of drug-susceptible TB in enabling future epidemics of MDR-TB. METHODS A computer simulation of MDR-TB epidemics was developed using an agent-based model platform programmed in NetLogo (See http://mdr.tbtool...

Multidrug-resistant tuberculosis (MDR TB) in Africa may be more prevalent than previously appreciated. Factors leading to development of drug resistance need to be understood to develop appropriate control strategies for national programs. We gathered estimates of MDR TB rates for 39 of 46 countries in Africa. The relationship between MDR TB rates and independent factors was analyzed by using c...

The HIV and multi-drug resistant tuberculosis (MDR-TB) epidemics are closely linked. In Thailand as part of a sentinel surveillance system, we collected data prospectively about pulmonary TB cases treated in public clinics. A subset of HIV-infected TB patients identified through this system had additional data collected for a research study. We conducted multivariate analysis to identify factor...

INTRODUCTION In high multidrug resistant (MDR) tuberculosis (TB) prevalence areas, drug susceptibility testing (DST) at diagnosis is recommended for patients with risk factors for MDR. However, this approach might miss a substantial proportion of MDR-TB in the general population. We studied primary MDR in patients considered to be at low risk of MDR-TB in Lima, Peru. METHODS We enrolled new s...