Typical pneumonia - Community-acquired pneumonia

Low urgency
CommonModerately severe
It is a lung infection acquired outside of the hospital. It is generally caused by bacteria and virus; the most common microorganism is Staphylococcus pneumoniae. The infection is spread by inhaling the microorganism. It characteristically manifests with cough, fever and yellow-green phlegm but it may also be accompanied by other symptoms of the infection. It is diagnosed through clinical questioning, physical examination, laboratory tests and imaging tests. Treatment varies depending on the causal microorganism. Antibiotic treatment is the most used when the infection is caused by a bacterium. It regularly requires a visit to a health center to confirm diagnosis and start treatment. A clinician will decide whether admission to the hospital is required.  
Bibliographic references
  1. Lionel A. Mandell, Richard G. Wunderink. Neumonía. Neumonía extrahospitalaria. Harrison. Principios de Medicina Interna. Volumen 2. 19ª Edición. 804:811.
  2. Musher DM, Thorner AR. Community-acquired pneumonia. N Engl J Med 2014; 371:1619.
  3. File TM. Community-acquired pneumonia. Lancet 2003; 362:1991.
  4. A. Agustí-Vidal, J. Estapé, M.C. Guzmán, J. Sánchez-Lloret. Infecciones del aparato respiratorio. Neumonía extrahospitalaria. Farreras Rozman. Medicina Interna. Volumen I. Duodécima edición 775:784.
Author
Dr. Oscar Garcia-Esquirol
Copyright
© TeckelMedical 2026

Symptoms

    Greenish-yellow sputum


    Difficult breathing


    Cough


    Coughing up more than usual


    Sharp stabbing chest pain

Symptoms to watch out for

Aged 65 years or older
Difficulty breathing
A feeling of shortness of breath
Fever not relieved by antipyretics (paracetamol, ibuprofen)
Worsening of cough
Pain in the chest when breathing
History of a severe lung disease such as Chronic Obstructive Pulmonary Disease (COPD)
Having any comorbidity such as diabetes mellitus, obesity, heart disease, kidney disease, brain disease, liver disease.
History of immunodeficiency (HIV, Diabetes Mellitus, oncological disorders, long-term corticosteroid consumption).

Self-care

Do not take antibiotics without a doctor's prescription.
Use over-the-counter analgesics and antipyretics for muscle pain or fever (temperature > 100.4 F).
Maintain hydration of half a gallon per day. Avoid soft drinks and fruit juices with high sugar content.
Eat a balanced diet: increase consumption of fruits, vegetables, and white meats, and reduce consumption of fatty and fried foods.