Method for producing mucoid and phage resistant group N streptoc

Details Method for producing mucoid and phage resistant group N streptoc Method for producing mucoid and phage resistant group N streptoc

1985-10-11

1990-04-17

Wiseman, Thomas G.

Chemistry: molecular biology and microbiology

Treatment of micro-organisms or enzymes with electrical or...

Modification of viruses

4352523, 435320, 435885, 935 52, 935 59, 935 72, C12N 1500, C12N 122, C12R 146

Patent

active

049180142

ABSTRACT:
A method for imparting phage resistance to phage sensitive strands of Streptococcus group N is described. The method involves transferring plasmid encoding for production of a mucoid substance (Muc.sup.+) into the phage sensitive strain. Even if the Muc.sup.+ plasmid is removed by curing at elevated temperatures the strains remain resistant to phage. The resulting resistant strains are novel and are used for fermentations, particularly milk fermentations.

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