Microbiology A person having diarrhea of six month duration. Acid fast organism of size 10 micron are found in stool. Most likely cause is: A Cryptosporidium B Isospora C Cyclospora D Giardia 💡 Explanation A person having diarrhea of six month duration. Acid fast organism of size 10 micron are found in stool. Most likely cause is: ✓ Correct Answer: C. Cyclospora