Bacterial pneumonia is an inflammation of the lung, usually caused by a bacterial or viral infection, but can be caused by inhalation of an irritant. Typical signs of bacterial pneumonia include fever, difficulty breathing, lethargy, and coughing. As these can also be caused by other diseases, diagnostics include a full physical exam, blood work, and radiographs, and may also require bronchoscopy or tracheal lavage to collect samples for cytology and bacterial culture and sensitivity. Treatment includes the use of one or more antibiotics that ideally would be selected using the results of a culture. Affected dogs may also require hospitalization and supportive care including intravenous fluids. The prognosis depends on the severity of the disease and whether there are any predisposing factors.