1887

Abstract

Ecological factors that control the establishment of cellulolytic bacteria and ciliate protozoa in the lamb rumen were studied in meroxenic animals. Axenic lambs received dilutions of rumen liquor from either conventional lambs and sheep (pool A) or meroxenic lambs (pool B).

The total number of bacteria established in the rumen was between 10 and 5 × 10 g. In lambs inoculated with dilutions (10, 10, 10) of pool A, cellulolytic bacteria did not become established. However, subsequent inoculation with , resulted in colonization in lambs that had received 10 and 10 dilutions of pool A. However, became established in only one of three lambs that received the 10 dilution. Similar results were obtained for the protozoan sp.

With pool B, lambs were inoculated earlier and cellulolytic bacteria were established directly from the 10 and 10 inocula. establishment occurred readily when inoculated into the lambs which had received the 10 dilution of pool B.

Results obtained in this study suggest that establishment of cellulolytic bacteria and protozoa requires an abundant and complex flora and is favoured by early animal inoculation.

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1983-01-01
2024-04-25
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