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ut significant difference between GF and CV chicks fed
sesame protein but t,his could not be confirmed in later
studi-es. ilith t,he heat-damaged proteins, the excretion of
uric acid tended to be higher in CV than GF chicks. The
authors conclude that most of the nitrogen that disappears
from the large intestine is in the form of amr¡onia and
that the microflora merely chang e the route of nitrogen
excretion. The latter could be of help to the protein
status of aninals fed Iow protein diets.
Wysocki and Baker (I972) studied bacterial protein
digestion in the equine lower gut. 14C-1"b"II"d bacteria
were infused into the caecurn of a caecal-fistulated pon3r
that was anaesthetj-zed. Negligible anounts of 14C were
detected in the deproteinized plesna amino acid fraction
of portal blood. They suggest the conversion of bacterial
protein to ammonia upon autodegradation of the nicro-
organisms. However, in a similar type of experiment,
Slade g! g!. (Lglir) showed that rnicrobial protein can be
degraded to yield amino acids r,rhich are absorbed in the
caecum of the horse. However, the rnagnitude of absorption
and therefore the nutritional significance was not established.
Hoover and Heítman (I975) found considerable fermentation of
l4C-a1anin" in both the caecum and upper col-on contents of
rabbi.ts, but there was little abso:'ption of f40-alanine
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