Objective—To evaluate rumen transfaunation after
surgical correction of left-sided displacement of the
abomasum (LDA) in cows.
Design—Prospective clinical trial.
Animals—20 multiparous cows with LDA.
Procedures—Cows with LDA were treated surgically
(day 0). On days 0 (immediately after surgery) and 1,
10 cows each received 10 L of rumen fluid (transfaunated
group) or 10 L of water (control group) via a
stomach tube. Postoperative dietary dry-matter intake
and milk yield of each cow were recorded daily for 5
days, beginning immediately after surgery. Blood and
rumen fluid samples were collected prior to surgery
and on days 1, 3, and 5 after surgery. Serum nonesterified
fatty acid and β-hydroxybutyrate concentrations
were measured. Volatile fatty acid and ammonia
concentrations and pH of rumen fluid were determined.
Urine specimens were collected and tested
for ketones at 8 AM and 4 PM. Cows with ketonuria
were treated with 50% dextrose solution administered
IV at the time ketonuria was first detected.
Cows with ketonuria were treated twice daily until
Results—All cows survived and completed their lactation.
Daily and cumulative dry-matter intake and
milk yield of cows in the transfaunated group were
significantly greater than those of cows in the control
group. Cows in the transfaunated group had significantly
lower serum concentrations of β-hydroxybutyrate
and significantly lower acetate-to-propionate
ratios in rumen fluid on day 1 after surgery, compared
with cows in the control group . Cows that received
transfaunate required a significantly lower total volume
of dextrose administered IV than control cows.
Conclusions and Clinical Relevance—Benefits of
rumen transfaunation of cows after surgical correction
of LDA included a lesser degree of ketonuria,
greater feed intake, and higher milk yield, compared
with nontransfaunated cows. (J Am Vet Med Assoc