Serogroups of Legionella pneumophila exhibited differential reactivities with plant agglutinin. Agglutination patterns were modified by growing the organisms in different media. The passage of four strains through guinea pigs did not result in altered reactivities with lectins or with plant agglutinins.

0.1% Protamine sulphate in normal (0.85% w/v) saline has been used as a diluent in Brucella serology instead of saline as such. The use of protamine sulphate in this concentration has obviated the need for performing the modified Coombs test to detect non-agglutinating Brucella antibodies. This method has been used in the Microbiological Diagnostic Unit of the University of Melbourne in the rou...

Mice bred at The Rockefeller Institute vary in their susceptibility to mouse typhoid infection caused by a certain strain of Bacillus pestis caviae. This graded variation may be roughly analyzed as follows: in any series infected per os with a fixed dose, 20 to 30 per cent show no sign of infection, no positive blood cultures, and no agglutinins; 5 or 10 per cent present symptoms of disease, po...

Host parasite relationships in the female genital tract were studied in bovine venereal vibriosis by investigating agglutinin production and alterations in superficial antigens of the bacterium during the course of infection in two heifers. Cervicovaginal mucus (CVM) steamed cell agglutinins were shown to appear earlier and remain at consistently higher levels than whole-cell agglutinins. Whole...

Reliability of the Widal tube agglutination test has been the subject of many controversies over the years. !is study was performed to assess the e$ect of certain modifications on the performance of Widal test in a novel microplate assay. Sera from 37 patients (21 males; 16 females) (mean age 28 + 7 years) were tested in the Immunology Unit at King Khalid University Hospital, Riyadh. Among them...