| rrna probing of chromosomal dna of epidemic and sporadic isolates of salmonella enterica subsp. enterica serovar kottbus from northern and southern italy. | fifty-two strains of salmonella enterica subsp. enterica serovar kottbus, identified at the centres of enterobacteriaceae of northern and southern italy, were investigated by molecular genetic methods. thirteen isolates were recovered during two food-poisoning outbreaks that occurred in may 1987 in lombardy. the rdna gene restriction patterns, obtained by probing endonuclease cleaved chromosomal dna with photobiotin labeled escherichia coli rrna, revealed some heterogeneity among strains isolate ... | 1990 | 2091942 |