 Cryptosporidium is a protozoan parasite that can cause diarrhea in both immunocompetent and immunosuppressed individuals. This study looked at the prevalence of cryptosporidiosis among renal transplant recipients who presented with acute diarrhea. A total of 644 patients were screened, and 343, 53 percent, tested positive for cryptosporidial oocysts. Further testing revealed that 43, 12.5 percent, also had dual infection with bacteria and protozoa. Additionally, 15, 4.3 percent, patients were found to have co-infection with Giardia intestinal oocysts, while 10, 2.9 percent, had Entomibia histolytica oocysts. These results suggest that cryptosporidiosis is a common cause of acute diarrhea in renal transplant recipients in Pakistan. This article was authored by Kapil Raja, Zayam Abbas, Sayed Mujahid Hassan, and others.