| polymorphism of listeria monocytogenes and listeria innocua strains isolated from short-ripened cheeses. | thirty isolates of listeria monocytogenes and 18 of l. innocua obtained from different short-ripened cheeses manufactured in asturias (northern spain), were compared with each other and with reference strains using serotype, phage type and pulsed-field restriction endonuclease digestion profiles analysis of the total dna. restriction enzymes apai and smai defined five clusters in l. monocytogenes (m1 to m5) and two main clusters in l. innocua (i1 and i2). cluster i2 was further arranged into thr ... | 1998 | 9633640 |