Serogrouping of Bacteroides vulgatus by the agglutination test

Direct serogrouping of Streptococcus pneumoniae strains in clinical samples by use of a latex agglutination test.

Pneumotest-Latex (Statens Seruminstitut) was evaluated for direct serogrouping of Streptococcus pneumoniae strains in clinical samples from patients with invasive disease. The technique was accurate to its level of discrimination for 62 of 67 clinical samples (92.5%). Pneumotest-Latex would be a useful alternative for direct serogrouping of pneumococci in clinical samples.

Serogrouping of Clostridium difficile strains by slide agglutination.

Six different agglutinating antisera were obtained by immunizing rabbits with Formol-treated strains of Clostridium difficile. After appropriate absorption, these antisera were used to define six serogroups designated by the letters A, B, C, D, F, and G. Altogether, 315 strains of C. difficile from various origins were tested for slide agglutination by these antisera; 312 (99%) of them were agg...

Characterization of cephalosporinases from Bacteroides fragilis, Bacteroides thetaiotaomicron and Bacteroides vulgatus.

The susceptibility of 80 Bacteroides fragilis group strains isolated from clinical specimens to beta-lactam antibiotics was investigated by agar dilution method. Twenty strains showed high resistance to the antibiotics. The resistance level of the isolates to cephaloridine was related to the amount of beta-lactamase activity (cephalosporinase; CSase) produced. B. fragilis GN-11477, B. thetaiota...

Slide agglutination test for serogrouping Legionella pneumophila and atypical Legionella-like organisms.

A simple, inexpensive slide agglutination test correctly identified the serogroup to which 38 Legionella pneumophilia strains belonged, and distinguished them from two atypical, Legionella-like organisms.

Detection of rotavirus by Latex Agglutination Test (Rotales); Comparison with Electron Microscopy and Complement Fixation Test