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A case report of periruminal abscess in dairy cattle

A 4-year-old Holstein dairy cow with a history of anorexia, decrease milk production and weight loss was referred to the faculty of veterinary medicine, University of Tehran. Tentative clinical diagnosis revealed the animal suffering from an atypical forestomachs disorder and subsequent left flank exploratory laparatomy cleared the existence of extensive adhesion at cranial portion of the rumen and large to medium-size (3 to 7 cm in diameter) abscesses at serosal surface of the wall of the rumen at caudal portion. Macroscopically, the masses were relatively firm and seemed they were filled with a liquid content. Cream-colored fluid with a watery consistency escaped when an abscess was opened. Serosal surface of the rumen was a portion of the wall of the abscesses. Pure E. coli was isolated from the abscess contents. Histopathologic examination confirmed a mass of pus encased in a wall of granulation tissue (pyogenic membrane). The literature reviews indicated that purulent abscesses were observed in liver, kidneys and peritoneal cavity of the cattle and rarely present in the serosal surface of rumen. This pathologic event and the subsequent disorder could be interfering with diagnosis of digestive system dysfunctions especially vagus indigestion, chronic peritonitis and abomasal displacement.