Drug resistance and genotypes of strains of Mycobacterium tuberculosis isolated from human immunodeficiency virus-infected and non-infected tuberculosis patients in Bauru, São Paulo, Brazil
Mem. Inst. Oswaldo Cruz
;
97(8): 1147-1152, Dec. 15, 2002. ilus, tab
Article
in English
| LILACS, SES-SP, SESSP-ILSLPROD, SES-SP, SESSP-ILSLACERVO, SES-SP
| ID: lil-326324
RESUMO
Little is known about transmission and drug resistance of tuberculosis (TB) in Bauru, State of São Paulo. The objective of this study was to evaluate risk factors for transmission of Mycobacterium tuberculosis strains in this area. Strains were collected from patients attended at ambulatory services in the region and susceptibility towards the main first line antibiotics was determined and fingerprinting performed. A total of 57 strains were submitted to susceptibility testing 23 (42.6 percent) were resistant to at least one drug while 3 (13 percent) were resistant against both rifampicin and isoniazide. Resistant strains had been isolated from patients that had not (n = 13) or had (n = 9) previously been submitted to anti-TB treatment, demonstrating a preoccupying high level of primary resistance in the context of the study. All strains were submitted to IS6110 restriction fragment length polymorphism (IS6110-RFLP) and double repetitive element PCR (DRE-PCR). Using IS6110-RFLP, 26.3 percent of the strains were clustered and one cluster of 3 patients included 2 HIV-infected individuals that had been hospitalized together during 16 days; clustering of strains of patients from the hospital was however not higher than that of patients attended at health posts. According to DRE-PCR, 55.3 percent belonged to a cluster, confirming the larger discriminatory power of IS6110-RFLP when compared to DRE-PCR, that should therefore be used as a screening procedure only. No clinical, epidemiological or microbiological characteristics were associated with clustering so risk factors for transmission of TB could not be defined in the present study
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Rifampin
/
Tuberculosis, Pulmonary
/
AIDS-Related Opportunistic Infections
/
Isoniazid
/
Mycobacterium tuberculosis
/
Antitubercular Agents
Type of study:
Etiology study
/
Risk factors
Limits:
Adult
/
Female
/
Humans
/
Male
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Year:
2002
Type:
Article
Institution/Affiliation country:
Fiocruz/BR
/
Instituto Lauro de Souza Lima/BR
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