COMPARATIVE-STUDY OF 2 PLATING MEDIA (PALCAM AND OXFORD) FOR DETECTION OF LISTERIA SPECIES IN A RANGE OF MEAT-PRODUCTS FOLLOWING A VARIETY OF ENRICHMENT PROCEDURES
Cpgl. Gunasinghe et al., COMPARATIVE-STUDY OF 2 PLATING MEDIA (PALCAM AND OXFORD) FOR DETECTION OF LISTERIA SPECIES IN A RANGE OF MEAT-PRODUCTS FOLLOWING A VARIETY OF ENRICHMENT PROCEDURES, Letters in applied microbiology, 18(3), 1994, pp. 156-158
Fifty-two different varieties of sausage, salami and pate were examine
d using Oxford (Oxoid) and PALCAM (Merck) listeria-selective agars. Se
ven (13%) samples were positive for Listeria monocytogenes and 14 (27%
) samples were positive for other Listeria species, while 31 (59%) sam
ples were negative for Listeria species. The effectiveness of PALCAM a
nd Oxford medium for the isolation of L. monocytogenes from the meat s
amples was compared. PALCAM medium was consistently more effective in
suppressing other micro-organisms thus enhancing the possibility of de
tecting Listeria species present in low numbers. The isolation of List
eria species for identification was also easier using PALCAM medium.