巨肾线虫 (Dioctophyme renale)虫卵，显微照片

Photomicrograph of urine sediment from a dog infected with giant kidney worm (Dioctophyme renale). Note the presence of D renale eggs, which are barrel-shaped and yellow-brown with thick, pitted shells and bipolar plugs and measure approximately 71–84 mcm in length and 45–52 mcm in width. Original magnification, 400X.