Comparison of Dey and Engley (D/E) neutralizing medium to Letheen medium and standard methods medium for recovery of Staphylococcus aureus from sanitized surfaces.

The ability of Dey and Engley (D/E) Neutralizing Medium to recover Staphylococcus aureus ATCC 6538 from tile surfaces exposed to a commercial phenol (Mikro-Bac) and a quaternary ammonium compound (Mikro-Quat) was compared to recovery with Letheen Medium. Standard Methods Medium was used as a control recovery medium. Organisms were exposed to both antimicrobials for varying time periods, then were recovered by swab and Rodac plate on both test media.

Methodology for recovery of chemically treated Staphylococcus aureus with neutralizing medium.

Recovery results of Staphylococcus aureus ATCC 6538 treated with phenolics and quaternary ammonium compounds on Dey and Engley (D/E) neutralizing medium at various time intervals were compared by the use of two commonly used media. Two recovery processes were utilized. In one, the chemically treated organisms were plated directly onto an agar medium.

Typing methods for Proteus rettgeri: comparison of biotype, antibiograms, serotype, and bacteriocin production.

Two hunderd five strains of Proteus rettgeri from epidemic and nonepidemic sources were differentiated by a new biotyping scheme, agglutination in O antisera, antimicrobial resistance patterns, and a new scheme based on bacteriocin production. The P. rettgeri were divided into 10 groups by their fermentation of lactose, sucrose, D-mannitol, and salicin.