Except for PCR amplification, once a sample with suspected oocysts has been recovered, standard tests are followed to identify "C. cayetanensis". These tests include phase contrast microscopy to check for the spherical oocysts described earlier, modified acid-fast staining to check for variable staining (from pale to red), and autofluorescence with UV lights. Obtaining these oocysts is usually the challenge, though recent studies show easier methods of obtaining them. In a recent study on different techniques used in fecal exams to identify oocysts, centrifuging a sample of feces in a sucrose solution and then transferring a small amount to a slide was found to be remarkably effective—both in oocysts found and relative ease of labor—in detecting "C. cayetanensis" oocysts: indeed, the paper concluded the positive samples obtained were around 84%.