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Appl Environ Microbiol. 1964 January; 12(1): 53-56
Copyright © 1964 by the American Society for Microbiology. All Rights Reserved.

Comparison of Two Methods for the Isolation of Salmonellae From Imported Foods

Food Hygiene Laboratory, Central Public Health Laboratories, Colindale, London, England

ABSTRACT

Two methods for the detection of salmonellae in foods were compared in 179 imported meat and egg samples. The number of positive samples and replications, and the number of strains and kinds of serotypes were statistically comparable by both the direct enrichment method of the Food Hygiene Laboratory in England, and the pre-enrichment method devised for processed foods in the United States. Boneless frozen beef, veal, and horsemeat imported from five countries for consumption in England were found to have salmonellae present in 48 of 116 (41%) samples. Dried egg products imported from three countries were observed to have salmonellae in 10 of 63 (16%) samples. The high incidence of salmonellae isolated from imported foods illustrated the existence of an international health hazard resulting from the continuous introduction of exogenous strains of pathogenic microorganisms on a large scale.

¹ Present address: Children's Memorial Hospital, Chicago, Ill.