![]() ![]() The lipopolysaccharide (LPS) core region of P. Distinguishing biochemical features of proteus penneri. penneri strains, a characteristic that remained unidentified by other methods. The RAPD technique, fundamentally a DNA fingerprinting method, has exposed a substantial DNA diversity among P. The application of molecular techniques such as the polymerase chain reaction to produce DNA fingerprints and other 16S ribosomal RNA gene (ribotyping) methods of strain analysis have been employed to differentiate P. penneri may also have a role in the establishment of an infectious process. It also has a filterable cytotoxic alpha-hemolysin rarely found in other Proteus species. penneri has a cell-bound hemolytic factor, which has been shown to facilitate penetration of the organism into cultured Vero cells without any cytotoxic effects. penneri to cefuroxime and the marked inhibitory activity of cefoxitin against this species also distinguishes P. Other chief characteristics of this species that enable its differentiation from other Proteus species include failure to acidify esculin, failure to produce hydrogen sulfide on triple sugar iron agar, and resistance to chloramphenicol. penneri isolates are not fermenters of salicin and not users of citrate, but acidify sucrose and maltose. penneri from another indole-negative Proteus species, P.mirabilis. The inability to produce ornithine decarboxylase differentiates P. penneri as being uniformly salicin negative. Lab identification and differentiation Įxtended biochemical tests have characterized P. The new species was named Proteus penneri in honor of John Penner, a Canadian microbiologist. vulgaris, was distinguished as a new species within the genus Proteus in 1982. vulgaris biogroup 1, or indole-negative P. ![]() In 1981, Hickman et al conducted experiments on 20 indole-negative strains previously grouped with P.vulgaris and demonstrated the existence of three P. showed through DNA hybridization studies that P. It reclassified a group of strains formerly known as Proteus vulgaris biogroup 1. The Proteus penneri group of bacteria was named in 1982.
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