title: [Experience in the isolation of salmonellae in foods of different risk categories (author's transl)].
abstract: 146 samples of pancreatic powder, 208 samples of pasteurized egg albumen, both deep-frozen and spray-dried, and 355 samples of frozen poultry were investigated for the presence of salmonellae. Four pre-enrichment media (lactose broth, nutrient broth, buffered peptone water and tryptone soya broth) and two direct selective enrichment media (dulcitol selenite and tetrathionate) were used. For the pre-enrichment of frozen poultry, buffered peptone water and tryptone soya broth proved to be more satisfactory than lactose broth and nutrient broth. Pre-enrichment of freeze-dried material in a non-selective medium yielded more Salmonella than were obtained by a direct selective enrichment. 16 of 146 samples of freeze-dried pancreatic powder contained salmonellae. Accordingly, tissue and organs of slaughter animals designed for the production of pharmaceutical preparations require regular bacteriological control.
mesh_terms: D003470:Culture Media; D005516:Food Microbiology; D005519:Food Preservation; D005628:Frozen Foods; D006358:Hot Temperature; D012475:Salmonella / Q000302:isolation & purification*; D013045:Species Specificity
chemical_list: D003470:Culture Media
vernacular_title: Erfahrungen bei der Isolierung von Salmonellen aus Lebensmitteln unterschiedlicher Risikokategorien.