Pneumonia is a common affliction among whales and dolphins. In a first for marine mammals, veterinarians have used bacteria-killing viruses to treat a beluga whale (Delphinapterus leucas) with a drug-resistant infection. Jetta, an 11-year-old beluga whale at Mystic Aquarium in Connecticut, developed chronic pneumonia caused by multi-drug-resistant E. coli bacteria. After powerful antibiotics proved mostly
