RESUMO
This paper reports the development of necrotic acute pancreatitis in a captive male adult Southern Brown Howler Monkey (Alouatta guariba clamitans, Cabrera, 1940) presenting acute apathy and anorexia. Blood samples were collected and supportive treatment was made although death could not be avoided. Necropsy was performed. First erythrogram results showed polycythaemia due to dehydration; second exam revealed anemia after fluid administration. Leukopenia with neutropenia suggested poor prognosis. Creatinine was in the reference range although BUN (blood urea nitrogen) was increased. Increased alanine aminotransferase, aspartate aminotransferase and creatin kinase serum activities were observed. Amylase and lipase serum activities were incredibly high. Necropsy revealed intense icterus in subcutaneous tissue and internal structures, including misshapen pancreas with rare glandular tissue. Acute pancreatitis diagnosis was made by clinical signs, laboratory findings, and necropsy.