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Appl Environ Microbiol. 1969 May; 17(5): 710-713
Copyright © 1969 American Society for Microbiology. All Rights Reserved.

Experimental Transmission of Enterobacteriaceae by Insects. I. Fate of Salmonella Fed to the Hide Beetle Dermestes maculatus and a Novel Method for Mounting Insects¹

Food Research Institute, U.S. Department of Agriculture Market Quality Research Division, The University of Wisconsin, Madison, Wisconsin 53706
Department of Entomology, U.S. Department of Agriculture Market Quality Research Division, The University of Wisconsin, Madison, Wisconsin 53706
Department of Bacteriology, The University of Wisconsin, Madison, Wisconsin 53706

ABSTRACT

A method of mounting insects was devised. The procedure is simple to perform and facilitates quantitative bacteriological studies of feces with a minimal possibility of cross contamination. By this method, it was observed that approximately 10⁷ cells of Salmonella were required for passage through the intestinal tract. Multiple doses of this magnitude were necessary to initiate intestinal infection. The numerical considerations cast doubt that Dermestes is involved significantly in the dissemination of Salmonella in the environment of food and feed plants.

¹ Published with the approval of the Director of the Wisconsin Agricultural Experiment Station.