Which parasites are commonly associated with chronic diarrhea and should be considered in fecal testing?

Which parasites are commonly associated with chronic diarrhea and should be considered in fecal testing?

• A. Giardia, whipworms, roundworms, hookworms
• B. Heartworms, fleas, ticks, lice
• C. Tapeworms only
• D. Coccidia only

Answer: (A)

Chronic diarrhea often points to persistent intestinal infection by parasites that shed detectable stages in stool, so a thorough fecal workup should screen for both protozoa and common intestinal nematodes. Giardia is a protozoan that irritates the intestinal lining and impairs absorption, frequently causing long-standing diarrhea in dogs and cats. The intestinal nematodes whipworms, roundworms, and hookworms each contribute to chronic GI signs through mucosal irritation, inflammation, or blood loss, and they are routinely detectable on fecal exams or with targeted tests. Because these organisms together cover the main infectious culprits behind prolonged diarrhea, testing that includes Giardia detection plus egg exams for whipworms, roundworms, and hookworms provides the most reliable assessment. The other options involve parasites not primarily associated with chronic GI disease or are incomplete for this clinical picture (ectoparasites like heartworms, fleas, ticks, and lice; tapeworms only; or coccidia only).

Chronic diarrhea often points to persistent intestinal infection by parasites that shed detectable stages in stool, so a thorough fecal workup should screen for both protozoa and common intestinal nematodes. Giardia is a protozoan that irritates the intestinal lining and impairs absorption, frequently causing long-standing diarrhea in dogs and cats. The intestinal nematodes whipworms, roundworms, and hookworms each contribute to chronic GI signs through mucosal irritation, inflammation, or blood loss, and they are routinely detectable on fecal exams or with targeted tests. Because these organisms together cover the main infectious culprits behind prolonged diarrhea, testing that includes Giardia detection plus egg exams for whipworms, roundworms, and hookworms provides the most reliable assessment. The other options involve parasites not primarily associated with chronic GI disease or are incomplete for this clinical picture (ectoparasites like heartworms, fleas, ticks, and lice; tapeworms only; or coccidia only).