Toxocara canis
描述：
Description: A canine roundworm (Toxocara canis) egg. Photo taken through a microscope at 400x. Date: 17 August 2006 (cropped on 2006-08-17). Source: Own work. Author: Joel Mills.
Description: A canine roundworm (Toxocara canis) egg. Photo taken through a microscope at 400x. Date: 17 August 2006 (cropped on 2006-08-17). Source: Own work. Author: Joel Mills.
