Aspiration pneumonia

Overview

Aspiration pneumonia is a lung infection that happens when you accidentally inhale food, liquid, vomit, or saliva into your lungs instead of your stomach. This can cause inflammation and infection in your airways and air sacs.

Aspiration pneumonia is not rare, but it is less common than other types of pneumonia. It occurs more often in older adults, people with neurological conditions, and those in hospital or long-term care.

People who have difficulty swallowing (dysphagia), a weak cough reflex, or are under sedation or anesthesia are at higher risk. This includes older adults, stroke survivors, people with dementia, Parkinson’s disease, or those who misuse alcohol or drugs.

Symptoms

Common symptoms

• Cough that may bring up foul-smelling or discolored mucus
• Shortness of breath or fast breathing
• Chest pain when breathing or coughing
• Fever and chills
• Feeling very tired or weak
• Wheezing

Symptoms in children

• Coughing or choking while feeding
• Fast or difficult breathing
• Lethargy or unusual sleepiness
• Poor feeding or vomiting
• Fever

Symptoms in older adults

• Confusion or delirium
• Low body temperature instead of fever
• Loss of appetite
• Decreased ability to swallow
• Worsening of chronic conditions like dementia

Causes

Main causes

• Inhaling food, drink, vomit, or saliva into the lungs
• Bacteria from the mouth or throat entering the lungs
• A weak cough reflex that cannot clear the lungs

Risk factors

• Difficulty swallowing (dysphagia) from stroke, dementia, or Parkinson’s disease
• Conditions that reduce consciousness, such as seizure, alcohol or drug overdose, or general anesthesia
• Poor dental hygiene or gum disease
• Acid reflux or hiatal hernia
• Use of feeding tubes or breathing tubes
• Being an older adult or a young child

When to see a doctor

See a doctor urgently if:

• If you have trouble breathing, chest pain, or are coughing up blood, seek emergency care immediately.
• If you choke on food or liquid and then develop a fever or cough within 24 hours, see a doctor urgently.

Book a routine appointment if:

• If you have a persistent cough, low-grade fever, or feel generally unwell after an episode of choking or aspiration, make an appointment to see your healthcare provider.
• If you have difficulty swallowing or frequent choking, talk to your doctor even without signs of infection.

Diagnosis

Your doctor will ask about your symptoms and any recent choking or swallowing problems. They will listen to your lungs with a stethoscope and may order tests to confirm the infection and find the cause.

Tests that may be done

• Chest X-ray or CT scan to see changes in your lungs
• Blood tests to check for signs of infection and measure oxygen levels
• Sputum culture – testing mucus from your cough for bacteria
• Swallowing evaluation or a video X-ray of swallowing (barium swallow)

What to expect at your appointment

The tests are usually not painful. A chest X-ray takes just a few minutes. You may be asked to cough into a cup for a sputum sample. If you have swallowing problems, you will be referred to a speech and language therapist for a swallowing assessment.

Treatment

Treatment focuses on clearing the infection from your lungs and preventing it from coming back. Most people need antibiotics and supportive care. In more serious cases, you may need to stay in hospital.

Self-care at home

• Get plenty of rest to help your body fight the infection.
• Drink fluids (if swallowing is safe) to keep mucus thin and easier to cough up.
• Use a humidifier or steam to help loosen mucus.
• Do not smoke or be around smoke.

Medical treatments

Doctors usually prescribe antibiotics to treat the bacterial infection. These may be given as pills or through a vein (IV) if you are in hospital. You may also receive oxygen to help breathing. If swallowing is a problem, a feeding tube or modified diet might be needed temporarily.

Living with this condition

Recovery from aspiration pneumonia may take a few weeks. During this time, follow your treatment plan, take all antibiotics as prescribed, and watch for any return of symptoms. If you have ongoing swallowing problems, you will need to work with a swallowing specialist to reduce the risk of another episode.

Lifestyle tips

• Eat slowly and sit upright while eating or drinking.
• Avoid talking or laughing with food in your mouth.
• Practice good oral hygiene – brush teeth and gums regularly to reduce bacteria in the mouth.
• If you have acid reflux, manage it with lifestyle changes and medications as advised by your doctor.

Diet and exercise

During recovery, eat soft, easy-to-swallow foods if needed. Stay hydrated with thickened liquids if recommended. Once recovered, gentle exercise like walking can help rebuild strength, but listen to your body and avoid heavy activity until fully healed.

Mental health and emotional wellbeing

Recovering from a lung infection can be stressful and tiring. You may feel anxious about swallowing or worry about another aspiration. These feelings are normal. Talk to your healthcare team about your concerns – they can offer support and refer you to a counselor if needed.

Prevention

Yes, many cases of aspiration pneumonia can be prevented by addressing swallowing problems and practicing good oral hygiene. If you have a condition that raises your risk, work with your healthcare team on a prevention plan.

Vaccines

Vaccines for pneumonia (like the pneumococcal vaccine) and the flu vaccine can reduce your risk of getting pneumonia in general. They do not directly prevent aspiration, but they can help keep your lungs healthier. Ask your doctor about which vaccines are right for you.

Screening programmes

If you have had a stroke, dementia, or other condition that affects swallowing, you may be offered a swallowing assessment to identify problems early. Regular dental check-ups are also a form of screening for oral health issues that can lead to aspiration pneumonia.

Complications

If left untreated

• The infection can spread and cause a lung abscess (a pocket of pus).
• Bacteria can enter the bloodstream, leading to sepsis – a life-threatening whole-body infection.
• Severe breathing failure requiring a ventilator.
• Chronic lung damage or scarring.

Long-term outlook

With prompt treatment, most people recover fully from aspiration pneumonia. The key is to treat the infection early and address the swallowing problem that caused it. Even in more serious cases, modern medicine offers effective treatments, and many people regain their health over time.

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