Pseudo-outbreak of Mycobacterium lentiflavum at a general hospital in Japan.
Infect Control Hosp Epidemiol
; 44(11): 1809-1815, 2023 Nov.
Article
in En
| MEDLINE
| ID: mdl-37096433
ABSTRACT
BACKGROUND:
Mycobacterium lentiflavum is a slow-growing nontuberculous mycobacterium that is widely distributed in soil and water systems, but it is sometimes pathogenic to humans. Although cases of M. lentiflavum infections are rare, 22 isolates of M. lentiflavum were identified at a single hospital in Japan. We suspected a nosocomial outbreak; thus, we conducted transmission pattern and genotype analyses.METHODS:
Cases of M. lentiflavum isolated at Kushiro City General Hospital in Japan between May 2020 and April 2021 were analyzed. The patient samples and environmental culture specimens underwent whole-genome sequencing (WGS). Additionally, we retrospectively collected clinical data from patient medical records.RESULTS:
Altogether, 22 isolates of M. lentiflavum were identified from sputum and bronchoalveolar lavage samples. Clinically, the instances with M. lentiflavum isolates were considered contaminants. In the WGS analysis, 19 specimens, including 18 patient samples and 1 environmental culture from the hospital's faucet, showed genetic similarity. The frequency of M. lentiflavum isolation decreased after we prohibited the use of taps where M. lentiflavum was isolated.CONCLUSIONS:
WGS analysis identified that the cause of M. lentiflavum pseudo-outbreak was the water used for patient examinations, including bronchoscopy.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Hospitals, General
/
Mycobacterium Infections, Nontuberculous
Limits:
Humans
Country/Region as subject:
Asia
Language:
En
Journal:
Infect Control Hosp Epidemiol
Journal subject:
DOENCAS TRANSMISSIVEIS
/
ENFERMAGEM
/
EPIDEMIOLOGIA
/
HOSPITAIS
Year:
2023
Document type:
Article
Affiliation country:
Japan