Ward G E, Nelson D I
Am J Vet Res. 1982 Jul;43(7):1165-7.
Calves fed whole milk had 2,000-fold fewer (P less than 0.001) coliforms in the cranial part of the small intestine than did calves fed skim milk (fat removed). Calves fed milk with 32 mM added propionic acid had nearly 1,000-fold lower (P less than 0.001) counts of lactobacilli in the entire gastrointestinal tract than did calves fed milk without added propionic acid.
与喂食脱脂牛奶（去除脂肪）的犊牛相比，喂食全脂牛奶的犊牛小肠头部的大肠菌数量少2000倍（P<0.001）。与喂食未添加丙酸牛奶的犊牛相比，喂食添加了32 mM丙酸牛奶的犊牛在整个胃肠道中的乳酸菌数量低近1000倍（P<0.001）。
