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Papulonecrotic tuberculid. Identification of Mycobacterium tuberculosis DNA by polymerase chain reaction. 1992

T Victor, and H F Jordaan, and D J Van Niekerk, and M Louw, and A Jordaan, and P D Van Helden
Department of Medical Physiology, Faculty of Medicine, University of Stellenbosch, Tygerberg, Republic of South Africa.

Sections from 22 formalin-fixed, paraffin-embedded skin biopsies from 12 patients with papulonecrotic tuberculid (PNT) were examined for the presence of Mycobacterium tuberculosis DNA with use of the polymerase chain reaction. All patients had a positive tuberculin skin test and a compatible clinical picture and responded to antituberculous therapy. Histological examination showed the typical morphology of PNT lesions with dermal necrosis surrounded by an ill-formed granulomatous infiltrate. Mycobacterial DNA was detected in 11 of the 22 biopsies. None of the negative controls showed positive DNA identification by amplification. Great care was taken in avoiding false-positive results due to contamination. After reviewing the literature, we believe this is the first time that PNT lesions have been investigated by PCR for the presence of mycobacterial DNA. These findings provide direct proof that mycobacterial products are present in PNT lesions and support the theory that this organism is in some way responsible for the development of PNT.

UI MeSH Term Description Entries
D008297 Male Males
D009169 Mycobacterium tuberculosis A species of gram-positive, aerobic bacteria that produces TUBERCULOSIS in humans, other primates, CATTLE; DOGS; and some other animals which have contact with humans. Growth tends to be in serpentine, cordlike masses in which the bacilli show a parallel orientation. Mycobacterium tuberculosis H37Rv
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D004269 DNA, Bacterial Deoxyribonucleic acid that makes up the genetic material of bacteria. Bacterial DNA
D004591 Electrophoresis, Polyacrylamide Gel Electrophoresis in which a polyacrylamide gel is used as the diffusion medium. Polyacrylamide Gel Electrophoresis,SDS-PAGE,Sodium Dodecyl Sulfate-PAGE,Gel Electrophoresis, Polyacrylamide,SDS PAGE,Sodium Dodecyl Sulfate PAGE,Sodium Dodecyl Sulfate-PAGEs
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D014382 Tuberculosis, Cutaneous Tuberculosis of the skin. It includes scrofuloderma and tuberculid, but not LUPUS VULGARIS. Scrofuloderma,Skin Tuberculosis,Tuberculid

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