Effect of feed on bacterial intestinal diseases
The animal sciences group in the Netherlands has
published a new report: The effect of feed composition on bacterial intestinal
diseases in pigs.
The report is a literature study to gain more insights in the role of feed in
pig enteric bacterial diseases dysentery (Brachyspira hyodysenteriae), colitis (Brachyspira pilosicoli),
intracellularis) and salmonellosis (Salmonella
bacterial diseases can be done by controlling the carbohydrate fraction in the
diet. This fraction contains mono-, di- and oligosaccharides and two
polysaccharides, starch and non-starch polysaccharides (NSP).
Australian research shows a reduction in the development of dysentery by
diets with a low amount of soluble NSP and a low amount of RS (resident starch)
limiting fermentation in the large intestine, for example high digestible diets
based on animal proteins and cooked white rice. However, this has not been
confirmed by European and Canadian researchers.
Danish work shows a reduction of dysentery by (fermented)
feeds, with or without soybean, lowering the large intestinal pH. Also a
non-carbohydrate, conjugated linoleic acid, may reduce the development of
As for dysentery, Australian research shows a reduction in the development of
colitis by feeding diets with a low amount of soluble NSP and a low amount of
RS. In contrast with the state of art on dysentery, Danish research confirms a
reduction of the development of colitis by feeding high digestible diets based
on animal proteins and cooked white rice.
Non- pelleted feed may contribute in the reduction of the
development of colitis. Ileitis may be reduced by fermenting a standard feed.
Non-pelleted feed and a low amount of NSP in the feed may contribute in the
reduction of the development of ileitis.
The risk of sub-clinical Salmonella infections is reduced when a coarsely in
stead of a finely ground feed is used or a non-pelleted instead of a pelleted
feed is used. Also liquid feeding reduces the risk of sub-clinical Salmonella
Australian research shows that feeding high digestible diets
based on animal proteins and cooked white rice reduces Salmonella infections.
Feed, and especially carbohydrate composition, may affect the development of
enteric bacterial diseases. Also the kind of feed ingredients (soybean or not)
may be an issue, as shown by the effect of an organic feed with typical
non-conventional ingredients on the development of dysentery. Besides feed
composition, also feed treatment (milling size, pelletizing, fermentation) is
important. A more coarse grinding, no pelletizing and fermentation may be
â€¢ ASG Report (Dutch version)
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