Lactose-fermenting salmonellae in Britain

Acquisition of lactose-fermenting properties by salmonellae. I. Interrelationship between the fermentation of cellobiose and lactose.

The fermentation of lactose by salmonellae has seldom been accomplished, and in but few serological types (Kauffmann, 1954; Kristensen, 1948, 1955). In previous investigations we (Schafler and SchiLfler, 1959) succeeded in obtaining lactose-positive variants in 17 out of 30 salmonella strains belonging to different types, by means of 32 to 150 days of incubation on partially defined media conta...

Lactose-fermenting Salmonella.

Salmonella species are generally considered to be unable to ferment lactose and sucrose according to Bergey's Manual. Recently, however, J. M. Bulmash, McD. Fulton, and J. Jiron (J. Bacteriol. 89:259, 1965) and L. J. Kunz and W. H. Ewing (J. Bacteriol. 89:1629, 1965) have reported two separate species of Salmonella capable of fermenting lactose and sucrose. The organism reported here again illu...

Lactose-fermenting Organisms Resembling Neisseria Meningitidis.

Growth advantage of fast lactose-fermenting mutants of slow lactose-fermenting coliform bacteria in gnotobiotic rats and mice.

When germ-free rats or mice were mono-associated with either Escherichia coli lac(-) (ATCC 15939) or a slow lactose-fermenting coliform (Paracolobactrum coliforme ATCC 11605), fast lactose-fermenting mutants overgrew the parent organisms.

Lactose utilization in Klebsiella pneumoniae: the slow utilization of lactose by resting cells of lactose fermenting strains.

Mutative lactose fermentation of lactose negative strains of Klebsiella pneumoniae to the lactose positive condition has been reported by Henriksen (1950) and Cabelli and Pickett (1953). The latter workers also demonstrated that the ability to ferment lactose was associated with a faster growth rate and with a greater resistance to the bacteriostatic action of the dye brilliant green, to the in...