Nested PCR for diagnosis of tuberculous lymphadenitis and PCR-SSCP for identification of rifampicin resistance in fine-needle aspirates.
An accurate diagnosis of tuberculosis and multidrug resistance is important for the control of tuberculosis, which remains a major public health problem. Fine-needle aspiration (FNA) has provided an alternative tool for bacterial examination. This study was performed to investigate the usefulness of one-step polymerase chain reaction (PCR) and PCR-SSCP as a routine test for the detection of Mycobacterium tuberculosis and rifampicin-resistant strain in FNA. Ziehl-Neelsen stain (Z-N) and PCR were processed using the aspirates of tuberculous lymphadenitis for the detection of M. tuberculosis. PCR-SSCP was done for the identification of rpoB mutation. M. tuberculosis was detected in 49/63 (77.8%) by PCR and 25/63 (39.7%) by Z-N. There were 26 cases with PCR(+)/Z-N(-) and two cases with PCR(-)/Z-N(+). Twelve cases showed negativity against both. In 7/22 (31.8%), rpoB mutation was observed. In conclusion, PCR is more sensitive in the detection of M. tuberculosis in FNA than Z-N. PCR-SSCP could also be used in FNA in the prediction of multidrug resistance.
Gong
Gyungyub
G
Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. gygong@amc.seoul.kr
Lee
Hungkyung
H
Kang
Gyeong Hoon
GH
Shim
Yhoung-hee
YH
Huh
Jooryung
J
Khang
Shin Kwang
SK
D000904:Antibiotics, Antitubercular / Q000494:pharmacology*; D001707:Biopsy, Needle / Q000379:methods; D004269:DNA, Bacterial / Q000032:analysis*; D004352:Drug Resistance, Microbial / Q000235:genetics; D006801:Humans; D008198:Lymph Nodes / Q000382:microbiology / Q000473:pathology; D008199:Lymphadenitis / Q000382:microbiology / Q000473:pathology*; D009169:Mycobacterium tuberculosis / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification*; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D012293:Rifampin / Q000494:pharmacology*; D014388:Tuberculosis, Lymph Node / Q000150:complications / Q000473:pathology*
D000904:Antibiotics, Antitubercular; D004269:DNA, Bacterial; D012293:Rifampin