Neonatal arthritis due to Proteus vulgaris.

Isolation of phenylalanine-negative Proteus vulgaris.

Three phenylalanine-negative Proteus vulgaris strains were isolated from three different sources. The significance of these Proteus strains has not been fully recognized.

Isolation and Characterization of Proteus Vulgaris

Unique developmental characteristics of the swarm and short cells of Proteus vulgaris and Proteus mirabilis.

Swarming cells of Proteus mirabilis and Proteus vulgaris could be distinguished from their short-cell counterparts by virtue of their synthesis (or lack of synthesis) of certain enzymes and outer membrane proteins. Urease synthesis was constitutive in swarm cells and uninducible in short cells. In contrast, phenylalanine deaminase was inducible in both short and swarm cells, demonstrating that ...

Separate O-grouping schemes for serotyping clinical isolates of Proteus vulgaris and Proteus mirabilis.

Antisera were prepared against type strains of the original scheme of B. Perch (Acta Pathol. Microbiol. Scand. 25:703-714, 1948) and against newly defined types to produce separate schemes for O-grouping Proteus vulgaris and Proteus mirabilis. In assessing the schemes for their effectiveness it was found that 82% of 208 P. vulgaris isolates and 88% of 194 P. mirabilis isolates from two hospital...

Distribution of lysine racemase in bacteria.

We have reported elsewhere the racemization of lysine by cell preparations of Proteus vulgaris strain ATCC 4669 (Huang et al., 1958). The simplest explanation of the results presented is that Proteus vulgaris contains a lysine racemase. The distribution of this activity in bacteria has now been investigated. Almost a hundred species, from eleven families, have been examined. Only nine species, ...