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MAC bacteria should always be considered in a person with HIV infection presenting with diarrhea. [citation needed] The diagnosis requires consistent symptoms with two additional signs: [citation needed] Chest X-ray or CT scan showing evidence of right middle lobe (or left lingular lobe) lung infection
Bacteria typically enter the lung with inhalation, though they can reach the lung through the bloodstream if other parts of the body are infected. Often, bacteria live in parts of the upper respiratory tract and are continuously being inhaled into the alveoli , the cavities deep in the lungs where gas exchange takes place.
In rare circumstances, bacteria in the lung will form a pocket of infected fluid called a lung abscess. [141] Lung abscesses can usually be seen with a chest X-ray but frequently require a chest CT scan to confirm the diagnosis. [141] Abscesses typically occur in aspiration pneumonia, and often contain several types of bacteria.
Certain bacterial infections can be serious and in some cases, life-threatening, say experts.
Inflammation is the body's immune response to any perceived threat to the body. Thus, treatment of chemical pneumonitis typically involves removal of the inflammatory fluid and supportive measures, notably excluding antibiotics. [21] The use of antimicrobials is reserved for chemical pneumonitis complicated by secondary bacterial infection. [19]
M. pneumoniae is known to cause a host of symptoms such as primary atypical pneumonia, tracheobronchitis, and upper respiratory tract disease.Primary atypical pneumonia is one of the most severe types of manifestation, with tracheobronchitis being the most common symptom and another 15% of cases, usually adults, remain asymptomatic.
Lower respiratory tract infection (LRTI) is a term often used as a synonym for pneumonia but can also be applied to other types of infection including lung abscess and acute bronchitis. Symptoms include shortness of breath , weakness, fever , coughing and fatigue. [ 3 ]
Bacteria are unicellular organisms present on Earth can thrive in various environments, including the human body. [14] Antibiotics are a medicine designed to treat bacterial infections that need a more severe treatment course; antibiotic use is not recommended for common bacterial infections as the immune system will resolve such infections. [15]