1. The absorption of typhus sera (human or antityphus horse serum) with Proteus X-19 removes only the Proteus agglutinins, leaving the Rickettsia agglutinins intact. 2. The absorption of typhus sera with Mexican Rickettsiae removes the agglutinins for both the Rickettsia and Proteus X-19. 3. While normal or formalinized Rickettsiae are not agglutinated by anti-Proteus serum, these organisms-whe...

1. Agglutinins are present in the blood of patients suffering from lobar pneumonia during some stage of the disease in a large percentage (73.8 per cent.) of the cases due to pneumococci belonging in groups I, II, and IV. 2. In most very severe and fatal cases agglutinins cannot be demonstrated, and it is probable that their absence during the later days of the disease may have unfavorable prog...

Two serologically distinct antibodies directed against different antigenic sites on the Group A carbohydrate were detected in human sera by agglutination techniques. Agglutinins with A-variant specificity were demonstrable by the direct agglutination of purified A-variant cell walls, whereas indirect Coombs-type agglutinins with Group A specificity were demonstrable with Group A cell walls. Sel...

Agglutinins for the meningococcus were not found in the spinal fluid of normal monkeys which had received antimeningococcic serum intravenously. The intraspinal injection of isotonic salt solution, normal horse serum, or a culture of living meningococci allows agglutinins for the meningococcus to pass from the blood to the spinal fluid of the passively immunized monkey; and the rate of the pass...

A cross-sectional study was conducted in south Wollo zone, north east Ethiopia between October, 2008 and March, 2009 aimed at determining the sero-prevalence and to identify potential risk factors of ovine brucellosis. A total of 800 sheep were sampled from two districts, Kalu and Harbu. All sheep above six months of age with no history of previous vaccination against brucellosis were selected....

It is well known that elevated levels of antibodies against various antigens of Group A pyogenic streptococci are found in rheumatic fever (Harris, 1948; Rantz and others, 1951). This phenomenon may be due to the increased immunologic reactivity of the macro-organism, to repeated natural infection by the micro-organism, or to the persistence of the micro-organism in the body of the host longer ...

Cold agglutinins are autoantibodies that agglutinate red blood cells at low temperatures, leading to haemagglutination and haemolysis. They are generally of no clinical significance. However, when people with cold agglutinins undergo cardiac operation with hypothermia and cold cardioplegia, they can experience complications. Thus, different perioperative management is required for such patients...

The purpose of this report is to describe some investigations which attempt to define the nature and incidence of naturally occurring leucocyte agglutinins. Agglutinins have been demonstrated in the sera of patients with acquired hemolytic anemia (1) and thrombocytopenic purpura (2, 3) and these have been distinguished from naturally occurring anti-red cell (4) and anti-platelet (5) agglutinins...

In a previous communication (Mackie, 1938) we have reported observations upon the Shigella dysenteriae agglutinin curves in a group of patients presenting the intestinal pathology of chronic bacillary dysentery and bacteriologic or serologic evdence of infection by these organisms. Fluctuation of the titre curves in individual patients, the common finding of higher titres in the culture-negativ...