[Comparative efficacies of selenite and tetrathionate broth and Leifson- and Wilson-Blair agar for the isolation of salmonellae (author's transl)].

Abstract

The statistical interpretation of the isolation of 3,581 Salmonella strains belonging to 30 species or serovars (S) shows that the efficacy of selenite and tetrathionate broth as enrichment media was of similar magnitude for 631 strains for 13 S. The tetrathionate broth was better in the case of 2,520 strains from 11 S and the selenite broth in 430 strains from 6 S including the two pathogenetic most important species S. typhi and S. schottmuelleri. Therefore, this point needs the unconditional use of selenite broth (Table 2). Wilson-Blair agar was more efficient than Leifson agar in the isolation of the most salmonella (Table 2). Also the percentage of suspicious and false-positive colonies on Leifson agar is higher and is due to more expensive work than on Wilson-Blair agar (Table 3).