Abstract
Summary and conclusions
Sixteen strains of A. fecalis which varied only in macroscopic growth appearance of colonies, motility and nitrogen gas production in Sellers' medium (5) were all agglutinated by PSH and 11 strains of Pseudomonas gave negative ag-glutinination reactions. Among the unidentified organisms there were 3 which showed biochemical reactions similar to those of A. fecalis but were not agglutinated by PSH. These strains may be atypical non-pigment producing, non-gelatin liquifying strains of Ps. aeruginosa. The possibility of using the agglutinating properties of PSH as a tool in the differentiation of A. jecalis from other Gram-negative rods, especially Ps. aeruginosa, is being further investigated.
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