Study of Dissociative Behavior ofPseudomonas aeruginos

Abstract

Since 1860, when Fordos published his experimental observations concerning the blue-green stain that sometimes appeared on surgical dressings, numerous articles dealing with the organisms commonly assigned to the species Pseudomonas aeruginosa have appeared in the literature. Because of its wide and 'This paper represents a portion of the dissertation to be submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy, St. Louis University. 2The work described in this paper was done under a contract, recommended by the Committee on Medical Research, between the Office of Scientific Research and Development and the St. Louis University.

DIFFERENTIAL TECHNIQUES AND METHODS OF ISOLATION OF PSEUDOMONAS

“…For the description of colony types exhibited by Ps. aeruginosa the reader is referred to the papers published by Gaby (1946Gaby ( , 1955 and to the photographs given therein.…”

PRACTICAL LABORATORY TEST FOR THE IDENTIFICATION OF PSEUDOMONAS AERUGINOSA

“…Despite the efforts made to identify Pseudomonas aeruginosa by saccharolytic methods, this gram-negative microorganism remains predominately a proteolytic bacillus with weak saccharolytic activity. Pigmentation, growth temperature, pellicle formation and other minor characteristics are unsatisfactory laboratory diagnostic criteria (Gaby, 1946(Gaby, , 1955; Gaby and Free, 1953). Needless to say it is highly probable that numerous P. aeruginosa and P. aeruginosa-like cultures have been erroneously identified.…”

Pseudomonas aeruginosa: changes in antibiotic susceptibility, enzymatic activity, and antigenicity among colonial morphotypes

“…Of the 90 clinical isolates screened by this procedure, 11 strains (12.2%) showed morphological heterogeneity and were phenotypically distinct when viewed on DBHI-SMA and BAP (Table 1). By source, wound and ulcer isolates harbored the highest frequency (23.5%) of these variants, 7, ears (3), bile (2), tumor sites (2), eyes (1), peritoneal dialysis fluid (1), stool (1), unknown origin (4). being almost 2 times higher than the overall average encountered for all cultures screened.…”