Common symptoms of pneumonia include cough, sputum, fever, and in severe cases, chest pain, coughing up blood, and difficulty breathing. Pneumonia can be detected by dry rales and wet rales on auscultation. Bacterial infections often show an increase in white blood cells, neutrophils, neutrophil percentage, C-reactive protein, and calcitoninogen. Viral infections have normal leukocytes, decreased lymphocytes, increased monocytes, normal C-reactive protein, calcitonin, and are positive for viral antibodies. Mycoplasma infection shows cough, coughing white sputum, and mycoplasma antibodies are quadruple elevated. Pneumonia causative organisms are different and treated differently. Bacterial pneumonia needs to be treated with antibiotics, viral pneumonia is treated symptomatically with antiviral, antipyretic and detoxification, and mycoplasma pneumonia requires macrolide antibiotics or quinolone antibiotics.