Biology ETDs


Paul Berger

Publication Date



Various portions of the gastrointestinal tract of a healthy sheep were sampled to determine the types of bacteria indigenous to the different areas. These portions included the abomasum, duodenum, jejunum, ileum, cecum, ascending colon, spiral colon, and descending colon. A minimum test set technique was developed and used to identify the bacteria. No definite pattern emerged when one region was compared with another region, although the total bacterial count for both the abomasum and the duodenum was less than that of the other locations sampled. Escherichia coli and an infrequent E. freundii were the only enteric bacteria found in the gastrointestinal tract. Streptococcus species were plentiful, but no one type predominated. Both aerobic and anaerobic sporeformers were common, as were Corynebacterium species. Pleomorphic and filamentous anaerobes, identified as Bacteroides species, Sphaerophorus species, fusiforms, and Lactoba­cillus bifidus, were also common.



Document Type


Degree Name


Level of Degree


Department Name

UNM Biology Department

First Committee Member (Chair)

John W. Beakly

Second Committee Member

R. Dean Heimbach

Third Committee Member

Martin William Fleck

Fourth Committee Member

Clarence Clayton Hoff

Included in

Biology Commons