BLOCH H
J Exp Med. 1948 Sep 1;88(3):355-60. doi: 10.1084/jem.88.3.355.
Aqueous extracts of 11-day-old chick embryos enhance the growth of tubercle bacilli in oleic acid-albumin media. These extracts also increase the tendency of virulent strains to exhibit the serpentine pattern of growth and confer this property on avirulent variants which normally grow unoriented in clumps. Growth in the presence of chick embryo extract slightly increases the virulence of the virulent strains but does not confer virulence on the avirulent variants.
11日龄鸡胚的水提取物可促进油酸 - 白蛋白培养基中结核杆菌的生长。这些提取物还增加了强毒株呈现蜿蜒生长模式的倾向,并赋予无毒变种这种特性,这些无毒变种通常以团块形式无序生长。在鸡胚提取物存在的情况下生长会略微增加强毒株的毒力,但不会赋予无毒变种毒力。