se #131 - May, 2004
A survey was conducted in several areas of Haiti to determine the prevalence of Cyclospora cayetenesis. The presence of geohelminths was also recorded and infected participants were treated. Stool samples were collected, preserved in 10% formalin, and processed using the formalin-ethyl acetate (FEA) concentration method. UV fluorescence microscopy was used to screen for Cyclospora oocysts and bright-field examination was performed to screen for geohelminths. The images below show what was found in one sample. Figures A and B show the same object using different microscopy techniques; the object is approximately 64 micrometers long. The object in Figure C is approximately 575 micrometers long (magnification 200×). Figure D was taken at 400× magnification. What is your diagnosis? Based on what criteria?