Health Dictionary Find a Doctor

Hospital-acquired pneumonia history and symptoms

Editor(s)-in-Chief: C. Michael Gibson, M.S., M.D. ; Philip Marcus, M.D., M.P.H.

Overview

Overview

Pneumonia fills the lung’s alveoli with fluid, keeping oxygen from reaching the bloodstream. The alveolus on the left is normal, while the alveolus on the right is full of fluid from pneumonia.

People with pneumonia often have a productive cough, fevershaking chills, shortness of breath, pleuritic chest pain, hemoptysis, headaches, sweaty, and clammy skin. Other possible symptoms are loss of appetite, fatigue, cyanosis, nausea, vomiting, mood swings, and joint pains or muscle aches. In elderly people manifestations of pneumonia may not be typical. They may develop a new or worsening confusion or may experience unsteadiness, leading to falls. Infants with pneumonia may have many of the symptoms above, but in many cases they are simply sleepy or have a decreased appetite. In VAP, often no history is available in patients with ventilator-associated pneumonia as they are often sedated and are rarely able to communicate.

History and Symptoms

History and Symptoms

Common Symptoms

Less Common Symptoms

Elderly

The manifestations of pneumonia, like those for many conditions, might not be typical in older people. They might instead experience:

Infant

Atypical Pneumonia

Major Points and Recommendations for Diagnosis of Adults with Hospital-Acquired, Ventilator-Associated, and Healthcare-Associated Pneumonia [1]

Major Points and Recommendations for Diagnosis of Adults with Hospital-Acquired, Ventilator-Associated, and Healthcare-Associated Pneumonia [1]

All patients should have a comprehensive medical history obtained and undergo physical examination to define the severity of HAP, to exclude other potential sources of infection, and to reveal the presence of specific conditions that can influence the likely etiologic pathogens (Level II)

For Level of evidence and classes click here.

References

References

Template:WH Template:WS

Looking for the patient version?

Back to the patient-friendly article

© 2026 MyEClinic – IFTM Institut für Telematik in der Medizin GmbH