This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Transplantation, Subject name: Surgery
Infection in renal transplant patient is usually caused by:- 
Select and explain. 
A. CMV, B. HIV, C. Herpes, D. Salmonella
A: CMV
Answer: A: CMV 
Explanation: Infection in renal transplant patient is usually caused by CMV. CMV INFECTION : CMV is most impoant pathogen in clinical transplantationQ. CMV infections usually occur after 30-50 daysQ after transplantation. CLINICAL FEATURES: CMV infections presents as fever, malaise, myalgia, ahralgia, and leukopenia. Organ involvement leads to pneumonitis; ulceration and hemorrhage in the stomach, duodenum, or colon; hepatitis; esophagitis; retinitis; encephalitis; or pancreatitis. DIAGNOSIS: Invasive CMV infection with histologic evidence or a positive CMV culture from deep tissue specimens is confirmatoryQ Chest X-ray: Bilateral diffuse interstitial pneumoniaQ TREATMENT IV ganciclovirQ is the mainstay of treatment and is safe and effective for prophylaxis & treatment. Bacterial infections in a renal transplant patient has the following manifestations: Pyelonephritis Cholecystitis Intra-abdominal abscesses Parotitis