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Isolation of Mima polymorpha from Dairy Products¹

Department of Plant Pathology, Bacteriology, and Entomology West Virginia University Morgantown

ABSTRACT

The tribe Mimeae (1) is a poorly described and little-understood group of aerobic, Gram-negative bacteria which have been implicated in cases of meningitis (4), septicemia (3), and endocarditis (5). Their habitat is listed as the normal vagina. No reference has been found that these organisms were ever isolated from a food product. Due to their uncertain taxonomic position, the Mimeae are not listed in Bergey's seventh edition (2), but are described by Skerman (6).

During the routine bacteriological examination of a number of pasteurized dairy products, a rather unusual colony type developed on violet red bile agar (VRB) from two of the products of the same plant. The colonies were red, spindle-shaped, and less than 0.3 mm in length. On extended incubation the colonies did not increase materially in size, nor was a halo of precipitated bile formed.

Results of the examination of the two products are presented in Table 1.

¹ Published with the approval of the Director of the West Virginia University Agricultural Experiment Station as Scientific Paper No. 765.