
TY  - JOUR
A1  - Judson, GJ 
A1  - Abdelsamie, R 
A1  - Bird, RB 
T1  - Digestion and utilization of <sup>35</sup>S-labelled bacteria placed in the caecum of the sheep
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1975
VL  - 26
IS  - 4
SP  - 743
EP  - 749
KW  - 
UR  - https://doi.org/10.1071/AR9750743 
N2  - Suspensions of ruminal bacteria made radioactive by growth in the presence of 3&#37; were injected into the caecum of sheep. The sheep were each given a daily ration of 540 g roughage and 235 g concentrates in 12 equal portions at 2-hourly intervals. Faeces and urine were collected, and peripheral blood was sampled at frequent intervals for up to 14 days after the caecal injection of radioactive bacteria. More than 99&#37; of the 35S in the bacterial suspensions was in the organic sulphur fraction. The percentages of administered 35S appearing in faeces and in urine (mean &plusminus; SEM) were respectively 69 &plusminus; 1 .8 and 21 &plusminus; 1.1; the corresponding percentages of this excreted 35S as inorganic sulphur were 16 &plusminus; 0.7 and 91 &plusminus; 2.3. The apparent digestibility of the 35S -labelled bacteria was 31&#37;, and the adjusted digestibility was about 42&#37;. The appearance of organic 35S in plasma immediately after the caecal injection of radioactive bacteria indicates that some organic 35S was absorbed from the hindgut. Of the 10 &plusminus; 2.3&#37; of the injected 35S dose retained by sheep at the end of the sampling period, about 3&#37; was present in the fleece. 
ER  -

