Pneumonia is a common illness. It is caused by many different germs. Pneumonia that starts in the hospital tends to be more serious than other lung infections because:
People in the hospital are often very sick and cannot fight off germs.
The types of germs present in a hospital are often more dangerous and more resistant to treatment than those outside in the community.
Pneumonia occurs more often in people who are using a respirator. This machine helps them breathe.
Hospital-acquired pneumonia can also be spread by health care workers, who can pass germs from their hands or clothes from one person to another. This is why hand-washing, wearing gowns, and using other safety measures is so important in the hospital.
People can be more likely to get pneumonia while in the hospital if they:
Have had chest surgery or other major surgery
Have a weak immune system from cancer treatment, certain medicines, or severe wounds
Antibiotics through your veins (IV) to treat the lung infection. The antibiotic you are given will fight the germs that are found in your sputum culture.
Oxygen to help you breathe better and lung treatments to loosen and remove thick mucus from your lungs
Ventilator (breathing machine) to support your breathing
People who have other serious illnesses do not recover as well from pneumonia as people who are not as sick.
Hospital-acquired pneumonia can be a life-threatening illness. Long-term lung damage may occur.
People visiting loved ones in the hospital need to take steps to prevent spreading germs. The best way to stop the spread of germs is to wash your hands often. Stay home if you are sick. Keep your immunizations up to date.
After any surgery, you will be asked to take deep breaths and move around as soon as possible to help keep your lungs open. Follow the advice of your health care provider to help prevent pneumonia.
Most hospitals have programs to prevent hospital-acquired infections.
American Thoracic Society. Guidelines for the management of adults with hospital-acquired, ventilator-associated, and healthcare-associated pneumonia. Am J Respir Crit Care Med. 2005;171:388-416. PMID: 15699079. Available at: www.ncbi.nlm.nih.gov/pubmed/15699079.
Chastre J, Luyt CE. Ventilator-associated pneumonia. In: Mason RJ, Broaddus VC, Martin TR, et al., eds. Murray and Nadel's Textbook of Respiratory Medicine. 6th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 34.
Klompas M. Nosocomial pneumonia. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 8th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 303.
Denis Hadjiliadis, MD, MHS, Paul F. Harron Jr. Associate Professor of Medicine, Pulmonary, Allergy, and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.