Interaction of Cryptosporidium parvum and Campylobacter jejuni in experimentally infected neonatal mice.

By the method of scanning electron microscopy (SEM), the inner mucosal surface of the ileum, ceacum and colon was studied in inbred BALB/c mice. Two-day-old mice were infected with either 10(6) oocysts of Cryptosporidium parvum and 10(8) CFU of porcine and human strains of the bacterium Campylobacter jejuni or with a combination of both enteropathogens. Pathological changes in infection with C.

Vero cytotoxin-producing strains of Escherichia coli in children with haemolytic uraemic syndrome and diarrhoea in Czechoslovakia.

The presence of verotoxin-producing strains of Escherichia coli (VTEC) was examined in six children with haemolytic uraemic syndrome and one child with haemorrhagic colitis. Stools were screened for strains of serogroup O157 on sorbitol-MacConkey agar for VTEC of other serogroups by serotyping. Verotoxin (VT) was tested on Vero cell monolayers: the antigenic variant of VT was assessed by neutralization experiments.

[Microbiological diagnosis of microorganisms tentatively designated as "SP organisms"].

The authors describe the biochemical characteristics of two strains described as "SP organism". This microorganism incertae sedis resembles from the biochemical aspect (oxidase+, mannite-, dextrose+ with gas) the species Pasteurella aerogenes; contrary to the latter it does not break down urea and differs also as regards the morphology of colonies, which on blood agar are coarser; it also has a higher content of G + C in DNA than Pasteurella. It is a pathogen of rodents.

Rarely occurring Shigella serovars.

In addition to the predominant Shigella sonnei, also rarely occurring Shigella serovars have been found in Czechoslovakia: 4 serovars of subgroup A (S. dysenteriae 3, 4, 7 and 12) and 11 serovars of subgroup C (S. boydii 2, 3, 5, 7, 9 lactose-positive, 10, 13, 14 aerogenic, mannitol-negative, 15, 16 and the provisional serovar E 16553).