市販鷄卵의 衛生學的 調査硏究

Study of sanitary examination chicken eggs in market

This studies were surveyed the actual states of the selling of chicken eggs at 35 poultry farms and 52 egg shops from march to october in 1988. Bacteriological and physicochemical tests against selling eggs were performed for establishment of egg sanitation. The results obtained were summarized as follows. Circulation process of the eggs was very complex. Shipping term of the eggs from poultry farms differentiated according to the scale. As scale of the poultry farms was larger, shipping term of the eggs was shorter. The necessary time of selling of the eggs at the salehouse differentiated according to wholesale stores and retail shops. In the physicochemical tests of the eggs, 103(23.3%) of 442 eggs disqualified in specific gravity, 79(14.2%) of 555 eggs in depth of air shell, 25(17.1%) of 146 eggs and 36(24.7%) of 146 eggs in pH of egg yolk and egg white, and 81(55%) of 147 eggs in coefficient of egg yolk. The selling eggs at the retail shops showed higher bacterial contamination than new eggs in colony forming units. Bacterial contamination level at parts of the eggs was orderly egg shell, egg white and egg yolk. No salmonellae detected all parts of the eggs.