1772
Lactobacillus brevis YM 3-30, a γ-aminobutyric acid producing bacteria, decreases blood endotoxin level of Hanwoo Cattle
This study was conducted to determine the effects and significance of Lactobacillus brevis YM 3-30, a γ-amino butyric acid (GABA) producing bacteria (GPB) on growth performance, meat quality and blood endotoxin level of Hanwoo cattle. Twenty seven Hanwoo steers (602.06 ± 10.13 kg) were subjected to a 129-day feeding trial and were fed daily with commercially available total mixed ration (TMR) supplemented with different inclusion rates of GABA produced by GPB: 3 g/kg (T1), 5 g/kg (T2) or non addition (Con) of GABA. The data gathered were gain in weight, feed conversion ratio (FCR), average daily gain (ADG), marbling score, and blood endotoxin. Hanwoo steers fed with GPB-produced GABA had superior weight performance than the control animals. Additionally, mean weight gains in T1 and T2 were 6.50 kg and 18.34 kg higher than those of the control, respectively, which resulted in higher ADG values in T1 (0.76 kg) and T2 (0.85 kg) than the control (0.71 kg). However, these differences were not statistically significant. The marbling score of meat from animals upon slaughter also did not differ significantly among treatments. However, animals in T1 and T2 had lower (P<0.05) blood endotoxin levels of 17.23 and 16.42 EU/ml, respectively, than the control group at 29.23 EU/ml. Hanwoo cattle fed with GPB-produced GABA diet decreased the plasma endotoxin level and comparable ADG, FCR, and beef marbling scores upon slaughter.
Keywords:
Blood endotoxin, γ-amino butyric acid, Hanwoo cattle