Bacterial contamination in feed ingredients, formulated chicken feed and reduction of viable bacteria by pelleting

Abstract

The number of bacteria in steam-pelleted or crumbled chicken food was compared with the number in individual ingredients and in mash. A few bacteria were detected in white-fish meal processed Alaska pollack. Highest yields were from alfalfa meal. Colonies numbering 3.5 x 10(3)-4.2 x 10(5) were obtained by heart-infusion agar culture, and 2.1 x 10(2)-7.0 x 10(4) with deoxycholate hydrogen sulphide lactose agar, from 1 g mash. After pelleting or crumbling the number of colonies in 1 g was reduced to 0-1.9 x 10(3) and 0-3.0 x 10(0) respectively. Bacteria in the lactose medium, mostly coliform, were observed in only 1 of 18 samples.

Prevalence and Distribution of Salmonella in Organic and Conventional Broiler Poultry Farms

“…The presence of Salmonella in broiler feed and feed ingredients (e.g., bone, meat, and fish meal) is well documented (Allred et al, 1967;Stott et al, 1975;Furuta et al, 1980;Bailey et al, 2001;Maciorowski et al, 2004). Bailey et al (2001) reported Salmonella prevalence of 2.33% (6/258) and 2.28% (6/263) in feed hopper and feeder (i.e., feedlines) in conventional broiler farms.…”

Control of Salmonella Contamination of Shell Eggs—Preharvest and Postharvest Methods: A Review

“…Steaming during pelleting process has been shown to eliminate bacteria (Stott and others ; Furuta and others ,b). Stott and others () showed that pelleting process reduced up to 1000‐fold the numbers of Enterobacteriaceae in poultry feed, by sampling before and after this processing stage.…”

“…Also, they isolated Salmonella only from samples of meat and bone meal. Furuta and others () observed that mash diets treated at 70 to 80 °C for 5 s in order to obtain pellets and crumbles, suffered a reduction of the number of bacterial colonies from 1.9 × 10 3 to 3.0 × 10° CFU/g.…”

Effects of a dietary added formaldehyde-propionic acid blend on feed enterobacteria counts and on growing pig performance and fecal formaldehyde excretion

“…In addition, the contamination of feed mills and feeding systems, especially in non-accessible areas, may be sources of feed and animal contamination (FURUTA et al, 1980;TORROELLA et al, 1987). Subclinical effects of pathogenic Enterobacteriaceae on weaned pigs are difficult to quantify, but their performance has been improved when the contamination of feed was lowered (DeROUCHEY et al, 2004).…”