Lipolytic and proteolytic activities of pseudomonas Spp isolated from table butter [electronic resource].

Includes references.

Twenty five samples of table butter were collected randomly in their retail containers from different localities in El-Dakahlia Governorate, Egypt. Collected samples were examined bacteriologically for occurrence and behavior of Pseudomonas organisms. Pseudomonas spp. Was isolated only from 5(20%) of 25 table butter samples, with a count ranged from 2x10 to 2.4x104 cfu/ml. The incidence of Pseudomonas organisms isolated from table butter samples using Pseudomonas selective medium (PSM) was Ps. fragi (10%), Ps. fluorescens (6%) and Ps. aeruginosa (2%). The proteolytic activity of isolated Pseudomonas spp on skim milk agar plates proved that all tested Ps. fragi (5) and Ps. fluorescens (3) and Ps. aeruginosa (1) produced proteolytic activity (100%). Lipolytic properities of isolated Pseudomonas spp from table butter proved that all tested Ps. fragi (5) and Ps. fluorescens (3) produced lipolytic activity . On the other hand Ps. aeruginosa failed to produce lipase enzyme. The public health and economic importance of isolated Pseudomonas spp as well as suggested control measures for improving the quality of the product were discussed.

Summary in Arabic.

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