Thereafter they enter red blood cells and multiply destroying the cells, causing recurrent fever attacks.

然后进入红细胞并开始繁殖，毁坏细胞，并造成周期性发热。

Given the patient's recurrent fevers, blood cultures were obtained on day 4; these have shown no growth to date.

鉴于患者反复发烧， 第 4 天进行了血培养； 迄今为止，这些都没有增长。