File:Chest_radiograph_in_influensa_and_H_influenzae,_posteroanterior,_annotated.jpg · Wikimedia Commons · See Wikimedia Commons

EntityQ12192· pop 141· linked from 8,238 articles

pneumonia

Also known as acute pneumonia, lung inflammation, inflammation of lung tissue, inflammation of lungs

Pneumonia is an inflammatory condition of the lung primarily affecting the small air sacs known as alveoli. Symptoms typically include some combination of productive or dry cough, chest pain, fever, and difficulty breathing. The severity of the condition is variable.

AI overview

Pneumonia is a lung infection that inflames the tiny air sacs where oxygen enters your bloodstream, causing symptoms like cough, chest pain, fever, and breathing difficulty. The condition can range from mild to severe, making it important to recognize symptoms and seek medical attention when needed.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Medical condition (new).name: Pneumonia
Medical condition (new).image: Chest radiograph in influensa and H influenzae, posteroanterior, annotated.jpg
Medical condition (new).caption: Chest X-ray of a pneumonia caused by influenza and Haemophilus influenzae, with patchy consolidations, mainly in the right upper lobe (arrow)
Medical condition (new).synonyms: Pneumonitis
Medical condition (new).field: Pulmonology, infectious disease
Medical condition (new).symptoms: Cough, shortness of breath, chest pain, fever
Medical condition (new).duration: Few weeks
Medical condition (new).causes: Bacteria, virus, aspiration
Medical condition (new).risks: Cystic fibrosis, COPD, sickle cell disease, asthma, diabetes, heart failure, history of smoking, very young age, older age
Medical condition (new).diagnosis: Based on symptoms, chest X-ray
Medical condition (new).differential: COPD, asthma, pulmonary edema, pulmonary embolism
Medical condition (new).prevention: Vaccines, handwashing, not smoking
Medical condition (new).medication: Antibiotics, antivirals, oxygen therapy
Medical condition (new).frequency: 450 million (7%) per year
Medical condition (new).deaths: Four million per year

via Wikipedia infobox

Research

599,905 papers

Atypical pneumonia: Pathophysiology, diagnosis, and treatment.ReviewRespiratory investigation · 2022Miyashita NDOI: 10.1016/j.resinv.2021.09.009
Pneumonia in the elderly.ReviewClinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases · 2001Cunha BADOI: 10.1046/j.1198-743x.2001.00328.x
[Community-acquired pneumonia].Deutsche medizinische Wochenschrift (1946) · 2023Seeger A, Rohde GDOI: 10.1055/a-1940-8944
Pneumonia in the immunocompetent patient.ReviewThe British journal of radiology · 2010Reynolds JH, McDonald G, Alton H et al.DOI: 10.1259/bjr/31200593
[Pneumonia and pregnancy].ReviewRevue des maladies respiratoires · 2025Shalaby A, Lachâtre M, Charlier CDOI: 10.1016/j.rmr.2025.01.002
Pneumonia after liver transplantation.ReviewCurrent opinion in organ transplantation · 2017Angarita SAK, Russell TA, Kaldas FMDOI: 10.1097/MOT.0000000000000427
Determinants of poor clinical outcome in patients with influenza pneumonia: A systematic review and meta-analysis.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2023Arranz-Herrero J, Presa J, Rius-Rocabert S et al.DOI: 10.1016/j.ijid.2023.04.003
Bacterial pneumonia in kidney transplant recipients.ReviewRespiratory medicine · 2018Wilmes D, Coche E, Rodriguez-Villalobos H et al.DOI: 10.1016/j.rmed.2018.02.022

via PubMed

Wikidata facts

Image: Pneumonia, mixed patterns, lobar and bronchopneumonia (3679096639).jpg

Show 7 more facts

Commons category: Pneumonia
Commons gallery: Pneumonia
NCI Thesaurus ID: C3333
ICPC 2 ID: R81
exact match: purl.obolibrary.org/obo/SYMP_0019168
ICD-9-CM: 483
P8168: hacktivism

Sources (9)

via Wikidata · CC0

~52 min read

Article

42 sections

Contents

Signs and symptoms
Cause
Bacteria
Viruses
Fungi
Parasites
Noninfectious
Mechanisms
Bacterial
Viral
Diagnosis
Diagnosis in children
Diagnosis in adults
Physical exam
Imaging
Microbiology
Classification
Community
Healthcare
Differential diagnosis
Prevention
Vaccination
Medications
Other
Management
Bacterial
Viral
Aspiration
Follow-up
Prognosis
Clinical prediction rules
Pleural effusion, empyema, and abscess
Respiratory and circulatory failure
Epidemiology
Children
History
Society and culture
Awareness
Costs
References
Bibliography
External links

Pneumonia is usually caused by infection with viruses or bacteria, and less commonly by other microorganisms. Identifying the responsible pathogen can be difficult. Diagnosis is often based on symptoms and physical examination. Chest X-rays, blood tests, and culture of the sputum may help confirm the diagnosis. The disease may be classified by where it was acquired, such as community- or hospital-acquired or healthcare-associated pneumonia.