China/epidemiology* ; Humans ; Mycobacterium Infections, Nontuberculous/microbiology* ; Nontuberculous Mycobacteria/classification* ; Transients and Migrants

Animals ; Disease Models, Animal ; Embryo, Nonmammalian ; microbiology ; Host-Parasite Interactions ; Mycobacterium Infections, Nontuberculous ; immunology ; microbiology ; Mycobacterium marinum ; pathogenicity ; Tuberculoma ; immunology ; microbiology ; Zebrafish ; embryology ; microbiology

Adult ; Female ; Humans ; Keratitis ; etiology ; microbiology ; pathology ; Keratomileusis, Laser In Situ ; adverse effects ; Mycobacterium Infections, Nontuberculous ; etiology ; pathology ; Mycobacterium chelonae ; isolation & purification ; Postoperative Complications ; etiology ; microbiology ; pathology

A retrospective analysis was performed in two major HIV/AIDS referral hospitals in Beijing to evaluate the prevalence of Mycobacterium tuberculosis (MTB) and non-tuberculous mycobacterial (NTM) infections in HIV-infected patients. A total of 627 patients' data were reviewed, and 102 (16.3%) patients were diagnosed with culture-confirmed mycobacterial infection, including 84 with MTB, 16 with NTM, and 2 with both MTB and NTM. The most frequent clinical complication by mycobacterial infection was pulmonary infection (48/102, 47.1%). The overall rates of multidrug-resistant TB (MDR-TB) and extensively drug-resistant TB (XDR-TB) were 11.9% and 3.4%, respectively. This study underlines the urgent need to intensify screening for mycobacteria coinfection with HIV and to prevent the spread of drug-resistant TB among HIV-infected patients.
AIDS-Related Opportunistic Infections ; epidemiology ; microbiology ; Adult ; Beijing ; Coinfection ; Extensively Drug-Resistant Tuberculosis ; epidemiology ; microbiology ; Female ; HIV Infections ; epidemiology ; microbiology ; Hospitals, Urban ; Humans ; Male ; Mycobacterium Infections, Nontuberculous ; epidemiology ; microbiology ; Mycobacterium tuberculosis ; isolation & purification ; Nontuberculous Mycobacteria ; isolation & purification ; Prevalence ; Retrospective Studies ; Sputum ; microbiology ; Tuberculosis, Multidrug-Resistant ; epidemiology ; microbiology ; Tuberculosis, Pulmonary ; epidemiology ; microbiology

OBJECTIVETo identify the novel species 'Mycobacterium fukienense' sp. nov of Mycobacterium chelonae/abscessus complex from tuberculosis patients in Fujian Province, China.

METHODSFive of 27 clinical Mycobacterium isolates (Cls) were previously identified as M. chelonae/abscessus complex by sequencing the hsp65, rpoB, 16S-23S rRNA internal transcribed spacer region (its), recA and sodA house-keeping genes commonly used to describe the molecular characteristics of Mycobacterium. Clinical Mycobacterium isolates were classified according to the gene sequence using a clustering analysis program. Sequence similarity within clusters and diversity between clusters were analyzed.

RESULTSThe 5 isolates were identified with distinct sequences exhibiting 99.8% homology in the hsp65 gene. However, a complete lack of homology was observed among the sequences of the rpoB, 16S-23S rRNA internal transcribed spacer region (its), sodA, and recA genes as compared with the M. abscessus. Furthermore, no match for rpoB, sodA, and recA genes was identified among the published sequences.

CONCLUSIONThe novel species, Mycobacterium fukienense, is identified from tuberculosis patients in Fujian Province, China, which does not belong to any existing subspecies of M. chelonea/abscessus complex.

Bacterial Proteins ; genetics ; Base Sequence ; China ; epidemiology ; Cluster Analysis ; DNA, Bacterial ; genetics ; Humans ; Molecular Sequence Data ; Mycobacterium ; classification ; genetics ; isolation & purification ; Mycobacterium Infections, Nontuberculous ; epidemiology ; microbiology ; Mycobacterium chelonae ; classification ; genetics ; isolation & purification ; Phylogeny ; Sequence Alignment ; Tuberculosis ; epidemiology ; microbiology

We report Mycobacterium fortuitum (M. fortuitum) catheter-related sepsis in a five-year-old boy with acute lymphoblastic leukaemia (ALL). This is the first reported case of M. fortuitum infection seen in our paediatric oncology patients. The patient was in haematological remission and receiving maintenance chemotherapy via an indwelling central venous catheter (Port-a-Cath). He was febrile, toxic-looking and was in respiratory distress. Clinically, he had a right pleural effusion and gross hepatomegaly. The patient was lymphopaenic and had deranged liver function test. Repeat paired blood cultures were positive for M. fortuitum. The catheter was promptly removed and he was treated aggressively with intravenous amikacin, cefoxitin, ciprofloxacin, trimethoprim-sulfamethoxazole and oral clarithromycin, with good clinical response. The patient remained well without further complications while on chemotherapy. M. fortuitum is an uncommon cause of catheter-related infection in patients with malignancies. Removal of an infected catheter is necessary for complete control of atypical mycobacterial infection in an immunosuppressed patient.
Acute Disease ; Antineoplastic Agents ; administration & dosage ; Catheters, Indwelling ; microbiology ; Child, Preschool ; Humans ; Immunocompromised Host ; Male ; Mycobacterium Infections, Nontuberculous ; complications ; microbiology ; Mycobacterium fortuitum ; isolation & purification ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; complications ; drug therapy ; Sepsis ; etiology ; microbiology

OBJECTIVETo explore the causative pathogens in littoral hand infections which exhibited chronic granulomatous inflammation, the relationship between chronic granulomatous inflammation and mycobacteria and to discuss the prospects of PCR in clinical application for diagnosis of granulomatous inflammation.

METHODWith 16S-rDNA as the target sequence, Nest-PCR was used to detect mycobacteria directly from 37 cases of chronic granulomatous inflammations, and identified them by gene sequencing.

RESULTSTwenty-four of 37 cases were positive for mycobacteria by Nest-PCR, in which 17 were M.marinum, 1 M.chelonae, 2 M.avium, 2 M.kansasii, and 2 M.tubercular through gene sequencing.

CONCLUSIONSNest-PCR combining gene sequencing proved to be a liable and sensitive method to detect Non-tubercular mycobacteria (NTM) in fresh tissue. NTM is the major factor of hand specific chronic infections other than tubercular. Pathological changes are difficult to differentiate TB from NTM and bacterial evidence was necessary.

Chronic Disease ; DNA, Bacterial ; chemistry ; genetics ; Granuloma ; diagnosis ; microbiology ; Hand ; Humans ; Inflammation ; diagnosis ; microbiology ; Molecular Diagnostic Techniques ; Mycobacterium Infections, Nontuberculous ; diagnosis ; microbiology ; Mycobacterium marinum ; genetics ; isolation & purification ; Mycobacterium tuberculosis ; genetics ; isolation & purification ; Nontuberculous Mycobacteria ; genetics ; isolation & purification ; Polymerase Chain Reaction ; RNA, Ribosomal, 16S ; genetics ; Sequence Analysis, DNA

Nontuberculous mycobacterial infections can cause destructive tenosynovitis of the hand. We report on and discuss the clinical course and distinctive radiologic findings of two patients with hand tenosynovitis secondary to M. marinum and intracellulare infection, which are different from those of the nontuberculous mycobacterial infections reported in the previous literature.
Female ; *Hand/radiography ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Mycobacterium Infections, Nontuberculous/*diagnosis/etiology/radiography ; Mycobacterium avium-intracellulare Infection/*diagnosis/etiology/radiography ; *Mycobacterium marinum ; Surgical Wound Infection/complications ; Tenosynovitis/diagnosis/*microbiology/radiography ; Wound Infection/complications

Mycobacterium neoaurum is rapidly growing mycobacteria that can cause human infections. It commonly causes bloodstream infections in immunocompromised hosts, and unlike other mycobacteria species, it rarely causes pulmonary infections. We confirmed the first pulmonary infection case in Korea caused by M. neoaurum using full-length 16S rRNA gene sequencing.
Adult ; Female ; Humans ; Lung Diseases/*diagnosis/microbiology ; Mycobacterium/genetics/*isolation & purification ; Mycobacterium Infections/*diagnosis/microbiology ; Nontuberculous Mycobacteria/genetics/isolation & purification ; RNA, Ribosomal, 16S/genetics ; Republic of Korea ; Sequence Analysis, RNA

BACKGROUNDAn increasing incidence of disease caused by nontuberculous mycobacteria (NTM) is being reported. The purpose of this study was to determine the isolation rates of NTM from various clinical specimens, and their antimicrobial susceptibility patterns, over a 4-year period in Shanghai.

METHODSAll NTM isolated between 2005 and 2008 at Shanghai Pulmonary Hospital, a key laboratory of mycobacteria tuberculosis in Shanghai, China, were identified with conventional biochemical tests and 16S rRNA gene sequencing. Antimicrobial susceptibility for all NTM was determined using the BACTEC MGIT 960 system.

RESULTSA total of 21,221 specimens were cultured, of which 4868 (22.94%) grew acid fast bacilli (AFB), and 248 (5.09%) of the AFB were NTM. The prevalence rate of NTM was determined as 4.26%, 4.70%, 4.96% and 6.38% among mycobacteria culture positive samples in years 2005, 2006, 2007 and 2008 respectively. These data indicated that the prevalence rate has continuously increased. Sixteen different species of NTM were identified, the most commonly encountered NTM in Shanghai were M. chelonae (26.7%), followed by M. fortuitum (15.4%), M. kansasii (14.2%), M. avium-intracellulare complex (13.1%) and M. terrae (6.9%). The rare species identified were M. marinum, M. gastri, M. triviale, M. ulcerans, M. smegmatis, M. phlci, M. gordonae, M. szulgai, M. simiae, M. scrofulaceum and M. xenopi. The five most commonly identified NTM species showed high drug resistance to general anti-tuberculosis drugs, particularly, M. chelonae and M. fortuitum appear to be multi-drug resistance.

CONCLUSIONSThe prevalence of NTM in Shanghai showed a tendency to increase over the course of the study. The five most commonly isolated NTM species showed high drug resistance to first line anti-tuberculosis drugs.

Antitubercular Agents ; pharmacology ; China ; epidemiology ; Drug Resistance, Bacterial ; Mycobacterium ; drug effects ; physiology ; Mycobacterium Infections ; epidemiology ; microbiology ; Mycobacterium chelonae ; drug effects ; physiology ; Mycobacterium fortuitum ; drug effects ; physiology ; Mycobacterium kansasii ; drug effects ; physiology ; Mycobacterium marinum ; drug effects ; physiology ; Mycobacterium xenopi ; drug effects ; physiology ; Nontuberculous Mycobacteria ; drug effects ; physiology ; Prevalence