Covert fi − R Factors in fi − R + Strains of Bacteria

Author:

Romero E.1,Meynell Elinor2

Affiliation:

1. Medical Research Council Microbial Genetics Research Unit, Hammersmith Hospital, London W12

2. Department of Microbiology, Lister Institute of Preventive Medicine, London SW1, England

Abstract

The presence of an fi sex factor can be detected by propagation of the I-specific phage If1. By use of this method of detection, a high proportion of strains with fi + R factors were shown also to carry an fi factor which was frequently a second R factor. In some doubly R + strains, the fi + and the fi factor were observed to be transferred independently at conjugation.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

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