Three cases of false-negative cerebrospinal fluid latex agglutination test results for patients with culture-positive cryptococcal meningitis are reported. False-negative results occurred in settings of low cryptococcal antigen concentrations in cerebrospinal fluid and were dependent on the latex agglutination test kit used. Investigation of each case revealed that prozone phenomena or interfer...

AIM To establish the etiology of recent out break of polyarthritis which occurred in Kanvari village of Churu district of Rajasthan in August, 1999. METHODOLOGY Forty eight patients of polyarthritis were studied by Hb, TDLC, ESR, CRP, throat swab Gram's stain and culture, blood culture, ASO titer, rheumatoid factor, Rose Bengal plate agglutination test, standard tube agglutination test for br...

A rapid, simple, and accurate counterimmunoelectrophoresis (CIE) technique was developed and compared with the indirect hemagglutination and rapid plate agglutination techniques for serotyping cultures of Pasteurella haemolytica. The CIE test had 100% correlation with the conventional indirect hemagglutination test and, after serum absorption, correctly identified cultures representing the 12 e...

Standard and experimental tests were used by a reference diagnostic laboratory to determine the identity of 182 "suspected" Neisseria gonorrhoeae isolates submitted by state health departments because of inconclusive laboratory results. More than 97% of these cultures were subsequently identified by a rapid microcarbohydrate test in conjunction with confirmatory immunological procedures. The ex...