Objective: To report a patient with non-HIV-related cryptosporidial diarrhea who was treated effectively with a regimen of high-dose azithromycin therapy.
Case summary: A 42-year-old immunocompetent man contracted cryptosporidiosis from an ailing calf that he had purchased. He finally was admitted to the hospital because of excessive weight loss and profuse diarrhea. The patient was started on a course of high-dose azithromycin therapy and symptoms resolved within 48 hours. Follow-up stool cultures were negative for the parasite.
Discussion: Although usually associated with immunocompromised patients, cryptosporidiosis occurs in immunocompetent hosts in a significant portion of the reported cases each year. Although self-limiting in most cases in this population, the disease can be severe at times and require treatment. Paromomycin therapy has been used in the past with good results. Although macrolides have had erratic effects against this parasite in the past, azithromycin (an azalide) demonstrated good efficacy in this patient.
Conclusions: Azithromycin has demonstrated that it may be an effective option for the treatment of cryptosporidiosis in immunocompromised patients. Studies involving its use in immunocompromised patients are currently underway.