Molecular characterization of Mycobacterium kansasii isolates in the State of São Paulo between 1995-1998
Mem. Inst. Oswaldo Cruz
;
99(7): 739-743, Nov. 2004. ilus, tab
Article
in English
| LILACS
| ID: lil-391604
RESUMO
Mycobacterium kansasii is the most common cause of pulmonary nontuberculous mycobacteria infection and classical identification of this pathogen needs a time consuming phenotypic tests. Polymerase chain reaction-restriction fragment lenght polymorphism analysis (PRA) of the gene enconding for the 65kDa heat shock (hsp65) protein offers an easy, rapid, and inexpensive procedure to identify and subtype M. kansasii isolates. In the present study, we performed a retrospective analysis of patients who had mycobacteria identified on the basis of phenotypic tests by means of a review of database at Mycobacteria Laboratory of the Instituto Adolfo Lutz in the period 1995-1998. A total of 9381 clinical isolates were analyzed of which 7777 (82.9 percent) were identified as M. tuberculosis complex and 1604 (17.1 percent) as nontuberculous mycobacteria. Of the 296 M. kansasii isolates, 189 (63.8 percent) isolates obtained from 119 patients were viable and were analyzed by PRA-hsp65. Hundred eight two (98.9 percent) were classified as M. kansasii type I. Two isolates were classified as type II and III and five isolates were characterized as other Mycobacterium species. Clinical isolates of M. kansasii in the state of São Paulo was almost exclusively subtype I regardless of HIV status.
Full text:
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Index:
LILACS (Americas)
Main subject:
Mycobacterium kansasii
/
Mycobacterium Infections
Type of study:
Observational study
Limits:
Humans
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2004
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Instituto Adolfo Lutz/BR
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