Which diagnostic method is used to detect Cyclospora cayetanensis in stool samples?

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Multiple Choice

Which diagnostic method is used to detect Cyclospora cayetanensis in stool samples?

Explanation:
Diagnosing Cyclospora cayetanensis relies on finding the parasite’s oocysts in stool under microscopy. This organism is an intestinal protozoan, so stool examination is the standard method. The oocysts are about 8–10 μm and can be difficult to see unless special staining or concentration techniques are used because they stain variably with acid-fast methods and may require fluorescence or enhanced microscopic methods to visualize clearly. Since shedding can be intermittent, multiple stool samples may be needed to confirm infection. Other options—blood culture, chest X-ray, and urine culture—do not detect intestinal protozoa and are not used to diagnose cyclosporiasis.

Diagnosing Cyclospora cayetanensis relies on finding the parasite’s oocysts in stool under microscopy. This organism is an intestinal protozoan, so stool examination is the standard method. The oocysts are about 8–10 μm and can be difficult to see unless special staining or concentration techniques are used because they stain variably with acid-fast methods and may require fluorescence or enhanced microscopic methods to visualize clearly. Since shedding can be intermittent, multiple stool samples may be needed to confirm infection. Other options—blood culture, chest X-ray, and urine culture—do not detect intestinal protozoa and are not used to diagnose cyclosporiasis.

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