Monitoring of Layer Feed and Eggs for Salmonella in Eastern Japan between 1993 and 1998

Abstract

In order to investigate contamination of chicken farms with Salmonella, feed and eggs were sampled from 16 commercial layer farms in eastern Japan between 1993 and 1998 and cultured for salmonellae. Salmonella enterica subsp. enterica isolates belonging to 19 serovars were obtained from the feed. Six of the 19 serotypes, including Salmonella serovar Enteritidis, were observed in isolates recovered from the eggs. Salmonella serovar Enteritidis strains obtained from a feed sample and egg contents in a layer farm showed pulsed-field gel electrophoresis patterns that were genetically related and belonged to a single phage type, suggesting that the contamination of the farms was linked to the occurrence of salmonellae in feed.

An Epidemiological Analysis of Salmonella Enteritidis Contamination in a Rat-Infested Chicken Layer Farm, an Egg Processing Facility, and Liquid Egg Samples by Pulsed-Field Gel Electrophoresis

“…A major factor in this increase has been attributed to consumption of undercooked eggs and egg products such as liquid egg, contaminated with S. Enteritidis [4]. Rodents, dirty environment, recent poultry farming practices, chicks, pullets, and feeds have all been considered as major sources for contamination with S. Enteritidis in chicken layer farms [5,7,[17][18][19]. In Japan, liquid egg is commonly used in making egg custard products.…”

Animal Feed Production and Contamination by Foodborne Salmonella

“…However, Davies and Wray (1996) did isolate S. Enteritidis and S. Typhimurium from spillage and dust samples and Shirota et al, (2000) isolated 20 strains of S. Enteritidis from eastern Japanese commercial layer rations. Further work by these authors using pulsed-gel electrophoresis patterns demonstrated a linkage between the feed contaminant S. Enteritidis serovar and the S. Enteritidis isolated from egg contents (Shirota et al, 2001). S. Typhimurium has also been isolated from poultry broiler and breeder diets (MacKenzie and Bains, 1976;Jones et al, 1991).…”

Antibiotic Resistance, Plasmids and Integron Profile of Salmonella Species Isolated from Poultry Farm and Patients

“…Contaminated food of animal origin and food-producing animals cause salmonella infection. 1 The most prevalent serovars found in feed products causes disease in human or animals and they survive in different environments. 2,3 However, Foodborne gastroenteritis, diarrhea and even septicemia occur in human and animals due to these causative agents.…”