对20只普通级SD成年大鼠进行检测，在13只大鼠的膀胱中发现膀胱线虫，肾盂中未发现膀胱线虫。每只鼠中有3～14条，均为雌虫、虫长为10．31±0．36mm，宽为15．50±6。48μm；虫卵呈椭圆形。两端有给节，大小为（63．67±0．95）×（36.67±1．39）μm。将收集到的线虫放入生理盐水中产卵，并将产出的80个卵放入（生理盐水＋青霉素）培养液中进行体外培养。48h后存活60个；72h后存活40个；96h后只剩4个卵存活；120h后全部死亡。这表明虫卵即使在很简单的体外培养的条件下依然能存活较长的时间。 Twenty normal adult SD rats were tested for bladder nematodes in the bladder of 13 rats and no cyst nematodes were found in the renal pelvis. Each mouse has 3 to 14, are female, insect length is 10.31 ± 0.36mm, width of 15.50 ± 6.48μm; eggs oval. Both ends of the section, size (63.67 ± 0.95) × (36.67 ± 1.39) μm. The collected nematodes were placed in physiological saline to lay eggs, and the output of 80 eggs into (saline + penicillin) medium for in vitro culture. After 48h survival 60; After 72h survived 40; After 96h, only 4 eggs survived; 120h after all died. This indicates that the eggs can survive for a longer period of time even under very simple in vitro culture conditions.