Takai S, Narita K, Ando K, Tsubaki S
Vet Microbiol. 1986 Jul;12(2):169-77. doi: 10.1016/0378-1135(86)90078-7.
The ecology of Rhodococcus (Corynebacterium) equi in soil was studied on a horse-breeding farm. R. equi was cultured from soil at a depth of 0, 10, and 20 cm on the six sites of the farm at monthly intervals for 10 months from March to December of 1983. The highest numbers of R. equi were found in the surface soil. The mean number of bacteria in soil samples at every depth increased remarkably from 0 or 10(2) to 10(4) colony-forming units (CFU) g-1 of soil in the middle of April, and later decreased gradually. R. equi inoculated into six soil exudate broths prepared from surface soils at separate sites yielded suspensions with different optical densities, indicating differences in growth. The distribution of serotypes in the soil was similar to that in the horses on the farm. These findings indicated that R. equi could multiply in the soil and flourish in the cycle existing between horses and their soil environment.
在一个养马场对土壤中马红球菌（棒状杆菌属）的生态学进行了研究。1983年3月至12月期间，每月间隔一次，从该农场六个地点0厘米、10厘米和20厘米深度的土壤中培养马红球菌，为期10个月。在表层土壤中发现的马红球菌数量最多。4月中旬，每个深度土壤样本中的细菌平均数量从0或10²显著增加到10⁴个菌落形成单位（CFU）/克土壤，随后逐渐减少。将马红球菌接种到从不同地点表层土壤制备的六种土壤渗出液肉汤中，得到了光密度不同的悬浮液，表明生长存在差异。土壤中血清型的分布与农场马匹中的分布相似。这些发现表明，马红球菌可以在土壤中繁殖，并在马与其土壤环境之间存在的循环中旺盛生长。
