Unfortunately, giardia is present all over the environment and is Very difficult to diagnose. Often, a persistent case of diarrhea is treated with fenbendazole just in case it's giardia. Does your puppy have diarrhea? Is that why he was tested for giardia? Giardia is visible under a microscope only at a very particular phase in its development, so the chance of testing on exactly the right day is a long shot.
Absent diarrhea, I don't test or treat for giardia. |