Amira Saad Helal Hassenin, A.Z. Durrani, Sagar M. Goyal, Fikry H. Yousef, Abdalla M. Selim, Abdallah A. Abou-Zeid, Retrospective Study on the Cause of Bacterial Diarrhea in Horses in Minnesota, Research Journal of Animal Sciences, Volume 4,Issue 2, 2010, Pages 77-82, ISSN 1993-5269, rjnasci.2010.77.82, (https://makhillpublications.co/view-article.php?doi=rjnasci.2010.77.82) Abstract: A retrospective study was conducted to determine the causes of bacterial diarrhea in horses Minnesota. The database of Veterinary Diagnostic Laboratory, University of Minnesota was searched over a 10 year period (2001-2010). A total of 1,260 fecal samples from diarrheic horses were received and tested. The most common pathogens found were E. coli (46%), Salmonella (27%), Clostridium perferings (19%) and Lawsonia intracellularis (8%). Keywords: Salmonella;E. coli;clostridia;lawsonia;diarrhea;horses