An 8-year-old male mongrel dog that had undergone renal transplantation was presented 25
days later with an acute cough, anorexia and exercise intolerance. During the
investigation, neutrophilic leukocytosis was noted, and thoracic radiographs revealed
caudal lung lobe infiltration. While being treated with two broad-spectrum antibiotics,
clinical signs worsened. Pneumonia due to infection with multidrug-resistant (MDR)
Pseudomonas (P.) aeruginosa, sensitive only to imipenem and amikacin,
was confirmed by bacteria isolation. After treatment with imipenem-cilastatin without
reducing the immunosuppressant dose, clinical signs completely resolved. During the 2-year
follow-up period, no recurrence was observed. To the best of authors’ knowledge, this is
the first report of pneumonia caused by MDR P. aeruginosa in a renal
recipient dog and successful management of this disease.