Kaspar L V, Poole C M, Norris W P
Lab Anim Sci. 1978 Oct;28(5):545-50.
In the last 17 years, 55 of 2,125 (2.6%) purebred beagles maintained in a closed colony had urolithiasis. Males comprised 72.7% of the affected animals. All the uroliths except one set in the kidneys were in the urinary bladder, the urethra, or both. All uroliths were nearly pure magnesium ammonium phosphate hexahydrate. Partially inbred beagles had a 10.7% incidence of urolithiasis, compared to a 2.0% incidence in an outbred line.
在过去17年中，封闭犬群中饲养的2125只纯种比格犬中有55只（2.6%）患尿石症。患病动物中72.7%为雄性。除1组位于肾脏外，所有尿石均位于膀胱、尿道或两者皆有。所有尿石几乎均为纯六水合磷酸镁铵。部分近交比格犬的尿石症发病率为10.7%，相比之下，远交品系的发病率为2.0%。
