[1] Your vet can identify parasites by their eggs, which float to the top of the small bottles when the manure is mixed with the solution contained in the large jar. The separated eggs can then be studied and identified under a powerful microscope. [2] Strongyle (a common intestinal parasite) eggs revealed by the solution test and magnified 100 times! [3] Roundworms (Ascarids) are among the most common parasites, and are sometimes passed in manure. If your dog or cat has ever had worms, these pests were probably the culprits. [14] Whipworm (Trichurus) egg as seen under the veterinarian's microscope. [5] Whipworms arc parasites found in many barnyard beasts. [6] When a manure test turns up parasite eggs in heavy concentrations, it usually indicates a severe infestation. [7] These tiny pinworms (Oxyuris) are often the cause of low vitality in horses. [8] Liver flukes (Fasciola and Fascioloides) infest sheep, goals, and cattle. [9] Tapeworms (Taenia and Dipylidium) are the largest internal parasites. [10] In this section of a badly infested horse's stomach, the brown dots are parasites called ""bots""