[Clinical significance of bacterial beta-lactamase production in the treatment of urinary tract infections with oral beta-lactam-antibiotics].

In 649 urological patients with urinary tract infections (UTI) a total of 1114 bacterial strains were isolated and their beta-lactamase production was investigated by a qualitative, micro-iodometric method. Approximately 40% of all strains, 33% of E. coli species and 8% of Proteus mirabilis species were enzyme producers.

[Frequency and significance of infections due to Yersinia enterocolitica in "acute appendicitis" (author's transl)].

In 352 patients who were hospitalized with symptoms of an acute appendicitis, Yersinia infection were determined in 18.2% of the cases by cultural and serological methods. Infections due to Y.

[Yersinia enterocolitica IHA-test (author's transl)].

612 serum specimens were examined for antibodies against Yersinia enterocolitica (Y.e.) with the Widal technique, and an indirect (passive) hemagglutination test.

[Determination of O-agglutinins against Yersinia enterocolitica by the indirect hemagglutination test (author's transl)].

O-agglutinins against Yersinia enterocolitica serovar 03 and serovar 09 in serum specimens were determined by the indirect (passive) hemagglutination test and the Widal technique. The hemagglutination test was carried out in microtitre plates with formalized and sensitized turkey erythrocytes. Cell wall antigens (lipopolysaccharides) were prepared by the phenol-water method.