| A 4 year-old nulliparous mongrel dog with a history of pseudopregnancy
was presented for examination. The dog presented erythema, tenderness and enlargement of
the right inguinal and left caudal abdominal mammary glands with bloody discharges.
Hematological and biochemical evaluation revealed leukocytosis with a shift to the left and
increased glucose, cholesterol and triglyceride levels. Based on history, the animal was
suspected of having diabetes mellitus. Cytological evaluation of milk showed numerous white
blood cells with predominant cell type of degenerate neutrophils containing rod and coccoid
bacteria. The pH of bloody milk was 8 and bacteriological culture revealed Staphylococcus
intermedius, Bacillus cereus and Pseudomonas auroginosa infection. In spite of cabergolin and
antibiotic therapy with ceftriaxone and control of diabetes, no clinical improvement was
observed. Ceftazidime was given based on an antibiogram result but after 2 weeks due to slow
clinical improvement, mastectomy was performed. Pathological findings showed ductitis
obliterans which is a rare late manifestation of mammary ductal ectasia. The findings suggest
that ductal ectasia, co-infection with pseudomonas and diabetes resulted in complications of
the mastitis. |