Fimbriation, surface hydrophobicity and serum resistance in uropathogenic strains of Escherichia coli.

A total of 80 Escherichia coli strains were examined for expression of P-fimbriae, mannose-sensitive haemagglutination (MSHA) and mannose-resistant haemagglutination (MRHA) of human group A erythrocytes and guinea pig erythrocytes, cell surface hydrophobicity and resistance to serum bactericidal activity. Isolates were obtained from urine of children and adults, either with acute pyelonephritis (n = 15 and n 12) or lower urinary tract infection (UTI) (n = 30 and n = 23, respectively). Results obtained showed that, in E.

Characteristics of Pseudomonas aeruginosa strains isolated from urinary tract infections.

Thirty-three uropathogenic strains of Pseudomonas aeruginosa were investigated for hemolytic activity in both bacterial broth culture filtrates and isolate lyzates, resistance to bactericidal activity of fresh human serum, resistance to six antibiotics and plasmid DNA profile. Twenty-four of the 33 (73%) bacterial filtrates showed lysis of rabbit erythrocytes, as did the three after guinea-pig erythrocyte treatment. Twelve of 33 isolate lysates showed in parallel lysis of both types of erythrocytes used.

[New findings on alpha-hemolytic strains of E. coli in urinary tract infections. II. Antigen structure, resistance, production of colicins and siderophores].

Alphahaemolytic uropathogenic strains of E. coli (UPEC) belong mostly into the serogroup 04, 06, 018 and 075. UPEC are resistant against antibacterial substances and against the bactericide action of serum.

[New findings on alpha-hemolytic strains of E. coli in urinary tract infections. I. alpha-hemolysin and adhesins].

Alphahaemolysin (AH) is one of the important factors of virulence of E. coli strains in urinary infections. The synthesis and secretion of AH is coded by four HLA genes which in the majority of strains are located on the chromosome.

[Alpha-hemolytic strains of Escherichia coli isolated in urinary tract infections in small children].

The authors focused attention on testing of biological properties of alpha-haemolytic strains of E. coli in infections of the urinary pathways in children and on the antibody response against alpha-haemolysin. The strains belonged into serogroups 02, 04, 06, 018, 075, 0112.