Kieser S T, Eriks I S, Palmer G H
Department of Veterinary Microbiology and Pathology, U.S. Department of Agriculture, Pullman, Washington.
Infect Immun. 1990 Apr;58(4):1117-9. doi: 10.1128/iai.58.4.1117-1119.1990.
Submicroscopic levels of Anaplasma marginale rickettsemia in persistently infected cattle were determined by using nucleic acid hybridization. Within individuals, the rickettsemia levels steadily increased from less than 10(4) infected erythrocytes per ml to a peak of more than 10(6) infected erythrocytes per ml and then rapidly declined. This logarithmic variation parallels the variation of the rickettsemia level seen in acute infection and suggests that cyclic emergence of antigenic variants is a mechanism of rickettsial persistence.
通过核酸杂交测定持续感染牛体内边缘无形体立克次氏体血症的亚显微水平。在个体内部,立克次氏体血症水平从每毫升少于10⁴个感染红细胞稳步上升至每毫升超过10⁶个感染红细胞的峰值,然后迅速下降。这种对数变化与急性感染中所见的立克次氏体血症水平变化相似,表明抗原变异体的周期性出现是立克次氏体持续存在的一种机制。