a: a change in frequency resulting in a change in position of a spectral line or band â compare doppler effect b: a removal or transfer from one thing or place to another â see chloride shift Learn More about shift
The most common lower respiratory tract infection is pneumonia, an infection of the lungs which is usually caused by bacteria, particularly Streptococcus pneumoniae in Western countries. Worldwide, tuberculosis is an important cause of pneumonia.ther pathogens such as viruses and fungi can cause pneumonia for example severe acute respiratory syndrome and pneumocystis pneumonia. A pneumonia may develop complications such as a lung abscess, a round cavity in the lung caused by the infection, or may spread to the pleural cavity.
Viruses usually infect a specific type of cell, which causes viral infections to affect certain parts of the body. A cold is the most common type and generally affects the upper respiratory tract.Influenza is another common infection, but symptoms can affect the entire body. Ad.rinary tract infections are common bacterial infections that can be treated with antibiotics. Thorough hand washing can help prevent infections. Some infections require antibiotic therapy. Fungus is a common cause of infections, such as ringworm.