Table 6 Mean (standard deviation) rumen fluid pH, ammonia, lactic acid, and volatile fatty acids (VFAs) concentrations on CF and NCF
From: Summer scour syndrome in weaned dairy calves: case series
Analyses | CF | NCF | Normal references | |||
|---|---|---|---|---|---|---|
CF 1 (n = 10) | CF 2 (n = 10) | CF 3 (n = 9)+ | NCF 1 (n = 8) | NCF 2 (n = 6)+ | ||
pH | 7.09 (0.23) | 6.75 (0.40) | 6.67 (0.40) | 6.88 (0.14) | 6.43 (0.31) | > 5.8a |
Ammonia (mg/L) | 29.6 (15.6) | 20.7 (18.5) | 17.6 (15.8) | 45.0 (8.8) | 17.2 (8.8) | 20b |
D-Lactic acid (g/L) | 0.07 (0.02) | 0.06 (0.01) | 0.08 (0.01) | 0.08 (0.01) | 0.06 (0.02) | < 0.09c |
L-Lactic acid (g/L) | 0.04 (0.01) | 0.03 (0.01) | 0.05 (0.01) | 0.04 (0.01) | 0.03 (0.01) | < 0.09c |
DL-Lactic acid (g/L) | 0.11 (0.03) | 0.09 (0.02) | 0.13 (0.01) | 0.12 (0.02) | 0.09 (0.30) | – |
Total VFAs (mM) | 153.6 (37.3) | 243.2 (83.1) | 286.0 (67.4) | 273.5 (48.8) | 250.9 (93.2) | – |
Molar proportions of VFAs (mol/100 mol) | ||||||
Acetate | 72.7 (3.0) | 61.2 (3.9) | 71.8 (2.8) | 72.8 (2.0) | 66.1 (1.1) | – |
Propionate | 16.7 (2.5) | 20.2 (2.0) | 16.5 (1.8) | 14.9 (2.1) | 22.6 (0.7) | – |
Butyrate | 7.0 (1.3) | 13.6 (1.7) | 8.8 (1.5) | 10.0 (2.0) | 8.9 (0.9) | – |
Isobutyrate | 1.1 (0.7) | 0.8 (0.1) | 0.4 (0.2) | 0.6 (0.1) | 0.5 (0.1) | – |
Valeric | 0.7 (0.2) | 1.9 (0.9) | 0.8 (0.6) | 0.5 (0.1) | 1.0 (0.3) | – |
Isovaleric | 1.8 (1.1) | 2.3 (0.4) | 1.7 (0.3) | 1.2 (0.3) | 0.9 (0.1) | – |
Acetate:Propionate | 4.5 (0.9) | 3.1 (0.5) | 4.4 (0.6) | 5.0 (0.8) | 2.9 (0.1) | – |