Susceptibility of dairy cows to subacute ruminal acidosis is reflected in milk fatty acid proportions, with C18:1 trans-10 as primary and C15:0 and C18:1 trans-11 as secondary indicators

Journal of Dairy Science
L JingV Fievez

Abstract

The current study was carried out to assess 2 hypotheses: (1) cows differ in susceptibility to a subacute ruminal acidosis (SARA) challenge, and (2) the milk fatty acid (FA) pattern can be used to differentiate susceptible from nonsusceptible cows. For this, 2 consecutive experiments were performed. During experiment 1, the milk FA pattern was determined on 125 cows fed an increasing amount of concentrate during the first 4 wk in milk (WIM). The coefficient of variation of several SARA indicative milk FA (i.e., C15:0, C18:1 trans-10, C18:2 cis-9,trans-11, and C18:1 trans-10 to C18:1 trans-11 ratio) increased, indicating that cows reacted differently upon the concentrate build-up. A first grouping was based on the milk fat C18:1 trans-10 proportion in the third WIM. Fifteen cows with the highest proportion of the latter FA (HT10) and their counterparts with low C18:1 trans-10 and equal parity distribution (LT10) were compared, which revealed that milk fat content and milk fat to protein ratio were lower for the HT10 group. From each of the HT10 and LT10 groups, 5 animals were selected for experiment 2. The subselection of the HT10 group, referred to as HT10s, showed a high proportion of C18:1 trans-10 at 3 WIM (>0.31 g/100 g of ...Continue Reading

References

Sep 30, 2004·Journal of Agricultural and Food Chemistry·Roberto StevanatoFederico Momo
Dec 22, 2006·Journal of Dairy Science·G B PennerT Mutsvangwa
Jul 20, 2007·Journal of Dairy Science·O AlZahalB W McBride
May 15, 2008·Journal of Animal Physiology and Animal Nutrition·F EnjalbertA Troegeler-Meynadier
Oct 5, 2010·Journal of Agricultural and Food Chemistry·I StefanovV Fievez
Apr 1, 2011·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Michael A SteeleBrian W McBride
Nov 17, 2011·Journal of Agricultural and Food Chemistry·Ivan StefanovVeerle Fievez
Sep 27, 2013·World Journal of Microbiology & Biotechnology·Wenjie HuoShengyong Mao
Jul 28, 2017·Animal : an International Journal of Animal Bioscience·C VillotM Silberberg

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