FIG. 1.

Enumeration of acetogenic and total viable anaerobic bacteria from the bovine rumen. Acetogenic bacteria were enriched on a rumen fluid-based medium containing 2.5 mM BES and enumerated by the MPN method. (A) Enumeration from ruminal contents of cattle fed a high-forage diet. Bars of the same pattern represent duplicate enumeration from the same animal done within 1 to 5 months. (B) Enumeration from ruminal contents of cattle fed a high-grain diet. Each bar represents one enumeration from one animal.