ON A MULTI-LYSOGENIC PSEUDOMONAS PYOCYANEA WHICH PRODUCES THREE DIFFERENT BACTERIOPHAGES

A Bacteriophage for Pseudomonas pyocyanea (Pseudomonas aeruginosa).

Selection of Functional Quorum Sensing Systems by Lysogenic Bacteriophages in Pseudomonas aeruginosa

Quorum sensing (QS) in Pseudomonas aeruginosa coordinates the expression of virulence factors, some of which are used as public goods. Since their production is a cooperative behavior, it is susceptible to social cheating in which non-cooperative QS deficient mutants use the resources without investing in their production. Nevertheless, functional QS systems are abundant; hence, mechanisms regu...

Pseudomonas Pyocyanea and the Arginine Dihydrolase System.

Non-pigmented strains of Pseudomonas pyocyanea occur frequently and this organism has only limited activity in conventional biochemical tests; 50 strains were tested for the presence of arginine dihydrolase and found positive whereas only Salmonella sp. and Enterobacter sp. among other Gram-negative species were positive. The test for arginine dihydrolase is rapid and simple and suitable for ro...

Incubator-borne Pseudomonas pyocyanea infection in a newborn nursery.

In recent years, Pseudomonas pyocyanea and other Gram-negative bacteria have appeared more frequently as important pathogens. This has followed the effective antibiotic treatment of infections due to most other organisms and is also related to the increasing use of certain equipment which may become readily contaminated and which is difficult to sterilize. The problem is particularly serious in...

Pyocine-typing of Hospital Strains of Pseudomonas Pyocyanea.

A method of typing Pseudomonas pyocyanea is described which makes use of the property of bacteriocine production. The method was applied in an epidemiological study of Ps. pyocyanea infection in a general hospital. It was found that the majority of strains believed on epidemiological grounds to be of common origin were allotted to the same pyocine type. In the course of this study, Ps. pyocyane...