Skalka B.: Antagonistic Effect of Staphylococcus hyicus and Staphylococcus chromogenes Exhibited on Staphylococcal Delta Hemolysin. Acta vet. Bmo, 60,1991: 61-69. Staphylococcus hyicus and Staphylococcus chromo genes are able to inhibit hemolytic effect of the staphylococcal delta hemolysin on agar media supplemented with human or sheep erythrocytes. This inhibition takes place even when the ef...

A thermolabile direct hemolysin from an El Tor cholera vibrio strain has been isolated and partially characterized as a simple protein of ca. 20,000 molecular weight. In addition to its hemolytic activity, the hemolysin is cytotoxic, cardiotoxic, and rapidly lethal. In these respects it resembles the thermostable direct hemolysin/cytotoxin/cardiotoxin/lethal toxin of Vibrio parahaemolyticus and...

To gain further evidence for the role of the Escherichia coli alpha-hemolysin in pathogenesis, its in vitro effects on human peripheral leukocyte function were studied. Leukocytes exposed to low doses of alpha-hemolysin responded with a marked chemiluminescence response, indicating activation of oxidative metabolism. This response was time and dose dependent. Pretreatment of leukocytes with dos...

To evaluate the pathogenicity of staphylococci from bovine raw milk, the general characteristics of 775 strains isolated from 798 samples of milk were studied. The coagulase test was performed by use of rabbit plasma. Chromogenesis, mannitol fermentation, and gelatin liquefaction were investigated on Chapman's Medium 110, after 48 hr of incubation. Production of beta-hemolysin, which has been c...

Some properties of eight strains of Newcastle disease virus (cell-fusing ability, hemolysin, heat stability of hemagglutinin or of hemolysin) do not correlate with virulence of these strains.

Although Pseudomonas aeruginosa has been known to produce hemolysis on blood agar plates, attempts to obtain hemolysin in broth culture filtrates of this organism have been generally unsuccessful. Bullock and Hunter (1900) noted that filtrates of 3 to 4 week old broth cultures of this organism lysed suspensions of erythrocytes of several animal species, including man. This finding was confirmed...

A rabbit homologous polyclonal antiserum to the 104-kilodalton hemolysin of Actinobacillus pleuropneumoniae serotype 1 strain CM-5 was specifically produced and used in an antigen capture enzyme-linked immunosorbent assay (ELISA) to detect swine serum antibodies to this potentially important virulence factor. Sera from pigs experimentally infected with the most common disease-producing serotype...

Vibrio parahaemolyticus is a marine bacterium known to be a common cause of seafood gastroenteritis worldwide. The thermostable direct hemolysin (TDH) has been proposed to be a major virulence factor of V. parahaemolyticus. TDH causes intestinal fluid secretion as well as cytotoxicity in a variety of cell types. In this study, we investigated the interplay between the hemolysin's enterotoxic an...

Davie, Joseph M. (Indiana University, Bloomington), and Thomas D. Brock. Action of streptolysin S, the group D hemolysin, and phospholipase C on whole cells and spheroplasts. J. Bacteriol. 91:595-600. 1966.-The effect of streptolysin S, the group D hemolysin, and phospholipase C (the alpha toxin of Clostridium perfringens) on whole cells and spheroplasts or protoplasts of three strains of strep...

The anti-inflammatory cytokine interleukin-10 and its viral homologs were chosen as model proteins for the development of drug delivery systems based on probiotic carriers like E. coli Nissle 1917, E. coli G3/10, and Saccharomyces boulardii. Exterior cytokine secretion was achieved by a modified E. coli hemolysin transporter. Release of interleukin-10 transported to the periplasm via the OmpF s...