Background: Pulmonary disease caused by nontuberculous mycobacteria has a variable clinical course. Although this is possibly the result of not only host factors, but also bacterial factors, many questions remain to be answered regarding these manifestations.
Methods: To assess the relationship between the progression of pulmonary Mycobacterium avium disease and bacterial factors we performed variable number tandem repeats (VNTR) typing analysis of M. avium tandem repeats (MATR) in M. avium isolates from 46 patients with different clinical courses, and furthermore, examined the association between disease progression and a pMAH135 plasmid derived from M. avium.
Results: In patients whose treatment was initiated because of worsenedchest radiograph findings and/or clinical symptoms within 18 months after being diagnosed with pulmonary M. avium disease, the detection rate of 6 genes located in pMAH135 was 35.3-47.1% for 17 isolates. However, in untreated patients with a stable condition, these rates were 10.3-13.8% in 29 isolates. MATR-VNTR typing analysis showed that isolates from patients with worsened disease and those with stable disease are clustered differently. In cluster III, the number of isolates from patients with worsened disease was higher than that from patients with stable disease (p = 0.019), and furthermore, the number of isolates carrying pMAH135 genes was higher than that not carrying pMAH135 genes (p ≤ 0.001).
Conclusion: These results indicate an association between the progression of pulmonary M. avium disease and pMAH135. The presence of pMAH135 genes might be a useful prognostic indicator for pulmonary M. avium disease and may serve as one criterion for treatment initiation.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Intestinal obstruction caused by disseminated mycobacterium avium complex disease following solid organ transplantation: a case report.
BMC Infect Dis
January 2025
Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, North 15 West 7, Kita-ku, Sapporo, 060-8638, Japan.
Background: Mycobacterium avium complex (MAC) is a common pathogen causing non-tuberculous mycobacterial infections, primarily affecting the lungs. Disseminated MAC disease occurs mainly in immunocompromised individuals, such as those with acquired immunodeficiency syndrome, hematological malignancies, or those positive for anti-interferon-γ antibodies. However, its occurrence in solid organ transplant recipients is uncommon.
View Article and Find Full Text PDFEvaluation of a Commercial Multiplex Real-Time PCR with Melting Curve Analysis for the Detection of Complex and Five Nontuberculous Mycobacterial Species.
Microorganisms
December 2024
Department of Laboratory Medicine, Korea University Anam Hospital, Korea University College of Medicine, Seoul 02841, Republic of Korea.
Background: Accurate and timely diagnosis of mycobacterial infections, including complex (MTBC) and nontuberculous mycobacteria (NTM), is crucial for effective disease management.
Methods: This study evaluated the performance of the NeoPlex TB/NTM-5 Detection Kit (NeoPlex assay, Seongnam, Republic of Korea), a multiplex real-time PCR assay that incorporates melting curve analysis, compared with the line-probe assay (LPA). The NeoPlex assay could simultaneously detect and differentiate MTBC from five other NTM species: , , , , and .
Value of anatomopathological examination in goats with a positive comparative intradermal tuberculin test as part of a tuberculosis control programme.
Vet Rec
January 2025
Departamento de Anatomía y Anatomía Patológica Comparadas, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain.
Background: Caprine tuberculosis is a chronic infectious disease caused by Mycobacterium bovis and Mycobacterium caprae. A tuberculosis control programme has been implemented using the comparative intradermal tuberculin (CIT) test. However, infection with Corynebacterium pseudotuberculsis and infection with or vaccination against Mycobacterium avium subspecies paratuberculosis (MAP) may have a negative impact on specificity.
View Article and Find Full Text PDFA genome-wide association study identified PRKCB as a causal gene and therapeutic target for Mycobacterium avium complex disease.
Cell Rep Med
January 2025
Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, P.R. China; Department of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Clinic and Research Center of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China. Electronic address:
Non-tuberculous mycobacterial pulmonary disease (NTM-PD) is a chronic progressive lung disease that is increasing in incidence. Host genetic factors are associated with NTM-PD susceptibility. However, the heritability of NTM-PD is not well understood.
View Article and Find Full Text PDFDevelopment and evaluation of multiplex real-time PCR for rapid identifying major pathogenic mycobacteria from pulmonary and extrapulmonary clinical samples in eastern China.
Heliyon
January 2025
Clinical Laboratory Center, Hangzhou Red Cross Hospital, Hangzhou, Zhejiang, 310003, China.
Background: Diseases caused by (MTB) and non-tuberculous mycobacteria (NTM) have similar clinical symptoms but require different treatments. Rapid and accurate identification of MTB and NTM is essential for proper patient management and treatment.
Methods: To develop and assess a multiplex real-time fluorescence PCR (Multiplex PCR) method for rapid identification of MTB, complex (MAC), M.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!