[Personal experience in testing for E. coli enterotoxigenicity].

When testing the production of the thermolabile enterotoxin by strains of E. coli, using six different methods, the highest positivity (100%) was recorded when using the modified test of oedema on mouse paws and the lowest one (5%) when using the Biken test. The strains were isolated from diarrhoeal infections in young children.

[Killing of seroresistant plasmid bearing E. coli strains in polymorphonuclear leukocytes].

Killing of 61 seroresistant E. coli strains equipped with virulence plasmids (F, Ent, Hly, Col) and resistance plasmids (R) in polymorphonuclear leukocytes (PMNL) of healthy donors was determined by the cultivation plate and fluorescence methods of phagocytosis. Killing of the control E.

[Evaluation of phagocytosis of alpha hemolytic strains of Escherichia coli using the fluorescence method].

The authors investigated phagocytosis in 37 alpha haemolytic strains of E. coli by the fluorescent method, after opsonization of bacteria with 5% and concentrated human serum. The strains were isolated from infants with gastrointestinal and extraintestinal infections and belonged to eleven serogroups.

[Escherichia coli in diarrheal disease in young children].

The authors describe a lower incidence of enteropathogenetic serogroups of Escherichia coli (EPEC) in 1981-1987. Of 85 EPEC strains tested for the presence of factors of virulence (fimbrim, enterotoxins, haemolysins, colicins) and factors of virulence against six antimicrobial substances (tetracycline, streptomycin, chloramphenicol, kanamycin, ampicillin, sulfamethoxidine) only three strains did not possess any of the mentioned factors. The authors draw attention to other pathogenetically important groups of E.