Detection of Mycobacterium leprae DNA by polymerase chain reaction in the blood and nasal secretion of Brazilian household contacts
Mem. Inst. Oswaldo Cruz
;
99(5): 509-511, Aug. 2004.
Artigo
em Inglês
| LILACS
| ID: lil-386683
RESUMO
DNA samples from blood and nasal swabs of 125 healthy household contacts was submitted to amplification by polymerase chain reaction (PCR) using a Mycobacterium leprae-specific sequence as a target for the detection of subclinical infection with M. leprae.All samples were submitted to hybridization analysis in order to exclude any false positive or negative results. Two positive samples were confirmed from blood out of 119 (1.7 percent) and two positive samples from nasal secretion out of 120 (1.7 percent). The analysis of the families with positive individuals showed that 2.5 percent (n = 3) of the contacts were relatives of multibacilary patients while 0.8 percent of the cases (n = 1) had a paucibacilary as an index case. All positive contacts were followed up and after one year none of them presented clinical signs of the disease. In spite of the PCR sensitivity to detect the presence of the M. leprae in a subclinical stage, this molecular approach did not seem to be a valuable tool to screen household contacts, since we determined a spurious association of the PCR positivity and further development of leprosy.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
DNA Bacteriano
/
Hanseníase
/
Mycobacterium leprae
Tipo de estudo:
Estudo diagnóstico
Limite:
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2004
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Fiocruz/BR
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