en عمومى General گزارش مورد case report Objective: Leptospirosis is one of the most common zoonosis diseases that presents by involvement of different systems. This infectious disease ranges from mild to very severe but bloody diarrhea is not a known clinical primary manifestation of the illness. Case Presentation: We describe a patient with leptospirosis who was admitted because of bloody diarrhea in the beginning. The patient admitted as a probable shigellosis case. Diagnosis of leptospirosis was confirmed based on result of Leptospira microscopic agglutination test (MAT). After 7 days treatment he made a complete recovery and was discharged. Conclusion: Although leptospirosis with presentation of bloody diarrhea is an unusual report. Leptospirosis should be considered in all febrile patients particularly in farmers endemic area. Leptospirosis, Diarrhea, MAT, Zoonosis 129 131 http://intjmi.com/browse.php?a_code=A-10-1-156&slc_lang=en&sid=1 Narges Najafi 10031947532846002702 10031947532846002702 Yes Antimicrobial Resistance Research Center, Department of Infectious Diseases, Mazandaran University of Medical Sciences, Sari, Iran Iman Sadeghian 10031947532846002703 10031947532846002703 No Student Research Committee, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran Fatemeh Ahangarkani 10031947532846002704 10031947532846002704 No Antimicrobial Resistance Research Center, Department of Infectious Diseases, Mazandaran University of Medical Sciences, Sari, Iran Roya Sheikholeslami 10031947532846002705 10031947532846002705 No Antimicrobial Resistance Research Center, Department of Infectious Diseases, Mazandaran University of Medical Sciences, Sari, Iran Lotfollah Davoodi 10031947532846002706 10031947532846002706 No Antimicrobial Resistance Research Center, Department of Infectious Diseases, Mazandaran University of Medical Sciences, Sari, Iran