What is the mechanism of pneumonia?

What is the mechanism of pneumonia?

Pneumonia and your lungs Most pneumonia occurs when a breakdown in your body’s natural defenses allows germs to invade and multiply within your lungs. To destroy the attacking organisms, white blood cells rapidly accumulate. Along with bacteria and fungi, they fill the air sacs within your lungs (alveoli).

What is the common site for aspiration pneumonia or abscess formation in comatose patients and why?

The superior segments of RLL, LLL and axillary subsegments of anterior and posterior segments of RUL are common sites for aspiration and will account for 85% of all Lung abscesses.

What is pulmonary necrosis?

Lung abscess is defined as necrosis of the pulmonary tissue and formation of cavities containing necrotic debris or fluid caused by microbial infection. The formation of multiple small (< 2 cm) abscesses is occasionally referred to as necrotizing pneumonia or lung gangrene.

What is pneumonia and its pathophysiology?

Pneumonia is an infection of the lungs that may be caused by bacteria, viruses, or fungi. The infection causes the lungs’ air sacs (alveoli) to become inflamed and fill up with fluid or pus. That can make it hard for the oxygen you breathe in to get into your bloodstream.

What is a lung abscess pneumonia?

A lung abscess is a pus-filled cavity in your lung surrounded by inflamed tissue. It usually results from breathing bacteria that normally live in your mouth or throat into the lungs, leading to an infection.

How does aspiration cause pneumonia?

Aspiration pneumonia occurs when food, saliva, liquids, or vomit is breathed into the lungs or airways leading to the lungs, instead of being swallowed into the esophagus and stomach. The major features of the lungs include the bronchi, the bronchioles and the alveoli.

What is lung necrotizing pneumonia?

Necrotizing pneumonia is a severe form of community-acquired pneumonia characterized by rapid progression of consolidation to necrosis and cavitation which may lead to pulmonary gangrene. Morbidity and mortality are high and chronic sequelae are frequent.

Does pneumonia cause necrosis?

Necrotizing pneumonia is a rare and severe complication of bacterial community-acquired pneumonia (CAP). Lying on a spectrum between lung abscess and pulmonary gangrene (1,2), necrotizing pneumonia is characterized by pulmonary inflammation with consolidation, peripheral necrosis and multiple small cavities (3).