A LACTOSE FERMENTING YEAST PRODUCING FOAMY CREAM

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.

Unclassified, lactose-fermenting, urease-producing member of the family Enterobacteriaceae resembling Escherichia coli.

Eight strains of an unclassified, oxidase-negative, lactose-fermenting, urease-producing, gram-negative bacillus were isolated from clinical material. With the exception of urease production, the biochemical characteristics of these organisms resembled those of Escherichia coli.

Lactose-fermenting yeasts in yoghurt and their effect upon the product and the bacterial flora.

With the exception of certain sour milks such as kefir and koumiss, the presence of lactose-fermenting yeasts in dairy products is most undesirable because it results in gassy fermentation. Since the early days of microbiology, many lactosefermenting yeasts, both sporogenous and asporogenous, have been isolated. In most of the cases, however, the descriptions of these yeasts, viewed by present ...

Construction of a ̄occulent Saccharomyces cerevisiae fermenting lactose

A ̄occulent Saccharomyces cerevisiae strain with the ability to express both the LAC4 (coding for b-galactosidase) and LAC12 (coding for lactose permease) genes of Kluyveromyces marxianus was constructed. This recombinant strain is not only able to grow on lactose, but it can also ferment this substrate. To our knowledge this is the ®rst time that a recombinant S. cervisiae has been found to fe...