Evaluation of a Proteus rettgeri O-serotyping system for epidemiological investigation

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Abstract
The serotyping system for P. rettgeri was evaluated through its application to 561 human isolates of this species. Of these, 545 were typable and could be separated into 58 O serotypes. A group of isolates from 1 hospital, clinically implicated in cross infections, belonged to the same O serotype, confirming the clinical findings. Isolates with more than 1 specificity of thermostable antigen usually had combinations of specificities restricted to combinations previously defined for the O-type strains. The use of pooled antisera was investigated; a system of pooling was devised to retain the specificity of the system and to increase the facility of the typing procedure. [P. rettgeri implication in human urinary tract infection and nosocomial disease has been recently noted.].

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