ABSTRACT
Garlic extract inhibited the growth of four strains of Mycobacterium tuberculosis, three strains of Mycobacterium avium-intracellulare, and three strains of Mycobacterium kansasii in concentrations ranging from 0.98 mg/ml to 2.94 mg/ml. Synergism could not be demonstrated when garlic extract was added to various concentrations of four commonly used antituberculous drugs.
Subject(s)
Antitubercular Agents/pharmacology , Garlic , Mycobacterium/drug effects , Plants, Medicinal , Disulfides , Drug Synergism , Mycobacterium avium/drug effects , Mycobacterium tuberculosis/drug effects , Sulfinic Acids/pharmacologyABSTRACT
An enzyme-linked immunosorbent assay (ELISA) was examined for its usefulness in detecting mycobacterial antigens in sputum. A double-antibody sandwich procedure was set up by using a commercially available hyperimmune serum directed against Mycobacterium bovis, BCG. The ELISA was able to detect 10 ng of protein per ml of BCG sonic extract. The system also clearly distinguished Mycobacterium tuberculosis organisms from Mycobacterium avium and Mycobacterium kansasii organisms. A total of 68 unknown sputum specimens submitted to the clinical laboratories for examination for tuberculosis were tested by ELISA. Of the 20 specimens that were smear positive and culture positive, 12 (60%) were positive by ELISA; 6 of the 11 (55%) smear-positive culture-negative samples were positive by ELISA; 1 of 2 (50%) of the smear-negative culture-positive samples was positive by ELISA; and only 3 of 35 (9%) of the smear-negative culture-negative samples were positive by ELISA. This approach offers promise as an aid in the presumptive differentiation of nontuberculous mycobacteria from the M. tuberculosis complex.
Subject(s)
Antigens, Bacterial/analysis , Mycobacterium tuberculosis/immunology , Sputum/immunology , Antibody Specificity , Enzyme-Linked Immunosorbent Assay , Humans , Mycobacterium/immunology , Mycobacterium bovis/immunology , Species SpecificityABSTRACT
Thirty strains of mycobacteria, consisting of 17 species, were inhibited by various concentrations of garlic extract incorporated in Middlebrook 7H10 agar. The concentration required ranged from a low of 1.34 mg/ml to a high of 3.35 mg/ml of media. When there were multiple strains of a species, a mean inhibitory concentration was determined for that species. Six strains of Mycobacterium tuberculosis required a mean inhibitory concentration of 1.67 mg/ml of media.
Subject(s)
Garlic , Mycobacterium/drug effects , Plant Extracts/pharmacology , Plants, Medicinal , Culture Media , Microbial Sensitivity Tests , Species SpecificityABSTRACT
Group B beta-hemolytic streptococci were isolated from the throats of 49 of 1,110 patients who had pharyngitis. Compared with patients whose throat cultures were negative for beta-hemolytic streptococci, those harboring group B were more likely to have enlarged tonsils (P less than 0.001), exudate (P less than 0.02), and tender enlarged anterior cervical lymph nodes (P less than 0.01). Group B should not necessarily be dismissed as a nonpathogen when identified in the pharynx of patients with exudative pharyngitis; laboratories which report beta-hemolytic streptococcal isolates from the pharynx only as group A or non-group A should be encouraged to perform definitive group identification of all beta-hemolytic isolates to further evaluate the role of other streptococcal groups as the causative agents for pharyngitis.
