High Genetic Diversity among Stenotrophomonas maltophilia Isolates from Single Hospital: Nosocomial Outbreaks or Genotypic Profile Changes during Subcultures
Malaysian Journal of Medical Sciences
;
: 40-49, 2018.
Article
in English
| WPRIM
| ID: wpr-732286
ABSTRACT
Background:
Stenotrophomonas maltophilia is a non-fermentative gram-negativebacillus which is widely recognised as an important nosocomial pathogen causing pneumonia,blood-stream, wound and urinary tract infections, particularly in immunosuppressed patients. Theaim of this study was to evaluate a nosocomial outbreak of by S. maltophilia in an intensive careunit of a tertiary hospital and evaluate unexpected multiclonality.Methods:
A total of 11 isolates from respiratory cultures in intensive care unit of a 24 bedtertiary hospital obtained over a one months period and one isolate obtained from the nebuliserduring environmental screening were investigated. The bacteria were identified by Phoenix 100system. The clonal relatedness was evaluated by PFGE and semi-automated repetitive sequencebasedPCR. Genotyping tests were repeated for 10 serial subcultures.Results:
PFGE and DiversiLab yielded 10 genotypic profiles for 12 isolates. Four to eightdifferent genotypes were observed from 10 subcultures of the same isolate.Conclusion:
We conclude that, high genetic diversity and supposed multiclonalappearance of the outbreak isolates may be due to changing profiles during subcultures mostprobably depending on hypermutation.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
English
Journal:
Malaysian Journal of Medical Sciences
Year:
2018
Type:
Article
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