Pehrson B, Carlström G
Acta Vet Scand. 1966;7(2):180-6. doi: 10.1186/BF03547109.
By means of gas chromatography the authors have found changes in the composition of the milk fat in ketosis and after fasting, the concentration of short-chain fatty acids falling and of long-chain rising. This is interpreted as indicating that no essential difference in this respect exists between ketotic cows and cows after a period of fasting associated with hyperketonaemia. Since clinically healthy cows without hyperketonaemia likewise had a lowered concentration of short-chain and elevated concentration of long-chain fatty acids in the milk fat if they received a low-energy diet during the first weeks after calving, the authors question whether the impaired lipogenesis reported by others in primary ketosis is not a physiological consequence of fasting and therefore lacks aetiological significance for the primary ketosis.
作者通过气相色谱法发现，酮血症和禁食后乳脂肪的成分发生了变化，短链脂肪酸浓度下降，长链脂肪酸浓度上升。这被解释为表明酮血症奶牛与禁食一段时间后出现高酮血症的奶牛在这方面没有本质区别。由于产后最初几周接受低能量日粮的临床健康且无高酮血症的奶牛，其乳脂肪中的短链脂肪酸浓度同样降低，长链脂肪酸浓度升高，因此作者质疑其他人报道的原发性酮血症中脂肪生成受损是否不是禁食的生理后果，因而对原发性酮血症缺乏病因学意义。
