Antibodies against delta-haemolysin from Staphylococcus strain CN4108 (Newman) did not neutralise delta-haemolysin from the canine strain of S. aureus CN7450 to the same extent as delta-haemolysin prepared from S. aureus strain CN4108. This is additional evidence for the immunological distinctness of delta-haemolysin from these two S. aureus strains of human and canine origin.

Forty-six patients presenting with chronic orofacial muscle pain and eight age- and sex-matched control subjects were investigated for the carriage prevalence of, and exotoxin production by, coagulase-negative staphylococci (CNS). The eight control subjects were selected from an initial group of 41 subjects on the basis of the absence of musculoskeletal symptoms. There was a significantly highe...

Contact-dependent haemolytic activity was observed with cells of Mycobacterium tuberculosis H(37)Rv and M. tuberculosis H(37)Ra, but not with those of M. bovis, M. bovis BCG and M. africanum. Culture filtrates of all these strains did not exhibit any haemolytic activity. M. tuberculosis H(37)Rv was subsequently used for the isolation of haemolysin. Haemolytic activity was retained in the cell d...

The production of a haemolysin by Streptococcus suis capsular type 2 was investigated. Human group O erythrocytes were the most susceptible, followed by horse, sheep, cow and pig red blood cells, which exhibited similar susceptibilities; rabbit erythrocytes were the least susceptible. The haemolysin was produced at the end of the exponential growth phase. The toxin described in this paper was p...

OBJECTIVES To show molecular similarity between two sequences of Proteus mirabilis (haemolysin--ESRRAL; urease--IRRET) with HLA-DR antigens (EQRRAA) which are associated with rheumatoid arthritis (RA) and type XI collagen (LRREI), respectively; and, in patients with RA, to measure levels of antibody against a 16-mer synthetic peptide containing the ESRRAL sequence, and the haemolysin and urease...

BACKGROUND & OBJECTIVE Very few studies regarding production of virulence factors in different predominant serotypes of uropathogenic Pseudomonas aeruginosa are available and they have not been correlated to in vivo pathogenicity in the urinary tract. This study was carriedout with the objective to analyze the phenotypic characters of uroisolates of P. aeruginosa in vitro and to study the assoc...

a haemolysin and the pathogenicity of Staphylococcus aureus has long been a matter for discussion. Christie, North, and Parkin (1946) stated that the production of a haemolysin is essential for full pathogenicity, and that coagulase-positive strains which produced no a haemolysin might be regarded as non-pathogenic. Marks (1952) found a close correlation between pathogenicity and the production...

The Bacillus cereus sensu lato group contains diverse Gram-positive spore-forming bacteria that can cause gastrointestinal diseases and severe eye infections in humans. They have also been incriminated in a multitude of other severe, and frequently fatal, clinical infections, such as osteomyelitis, septicaemia, pneumonia, liver abscess and meningitis, particularly in immuno-compromised patients...

The haemagglutination test for antileucocidin is frequently positive in cases of bone tuberculosis in the absence of obvious staphylococcal infection. This test is therefore of little practical use in the differentiation of staphylococcal and tuberculous bone disease, and its use has been discontinued at the Royal National Orthopaedic Hospital. The antigamma haemolysin test in bone tuberculosis...

Group B streptococcus [(GBS or Streptococcus agalactiae)] is a leading cause of neonatal meningitis and septicaemia. Most clinical isolates express simultaneously a β-haemolysin/cytolysin and a red polyenic pigment, two phenotypic traits important for GBS identification in medical microbiology. The genetic determinants encoding the GBS haemolysin and pigment have been elucidated and the molecul...