Differential Diagnosis for Bloody Diarrhea and Abdominal Pain with Intracellular Oval Bodies
- Single Most Likely Diagnosis
- Entamoeba histolytica: This diagnosis is most likely because the description of intracellular two oval bodies that are pink on histological slides is highly suggestive of Entamoeba histolytica infection. E. histolytica is a known cause of bloody diarrhea and abdominal pain, and the presence of these organisms within the colonic mucosa is consistent with the patient's symptoms.
- Other Likely Diagnoses
- Salmonella enteritis: While Salmonella infections can cause bloody diarrhea and abdominal pain, the presence of intracellular oval bodies is not typical for Salmonella. However, it's still a consideration in the differential diagnosis for gastrointestinal infections presenting with similar symptoms.
- Do Not Miss Diagnoses
- Cytomegalovirus (CMV) infection: Although the question states that the findings are similar to CMV but not CMV, it's crucial not to miss CMV infection, especially in immunocompromised patients, as it can have severe consequences. CMV can cause similar symptoms and histological findings, including intranuclear inclusions.
- Rare Diagnoses
- Other protozoal infections: Such as Balantidium coli or other less common intestinal protozoa could potentially present with similar symptoms and histological findings, although they are much less common than E. histolytica.
- Microsporidia: These are obligate intracellular parasites that can cause diarrhea in immunocompromised patients. However, their diagnosis typically requires special staining techniques and is less likely given the description provided.