which bacteria causes pneumonia
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streptococus pneumoniae
Answer:
The most common cause of bacterial pneumonia is a type of bacteria known as Streptococcus pneumoniae. Haemophilus influenzae, Chlamydia pneumoniae, Mycoplasma pneumoniae, and Legionella pneumophila are some other major bacteria that cause pneumonia. Pneumonias of these type are quite common and are often referred to as community-acquired pneumonia (CAP). People who spend significant time around or in hospitals or other health-care facilities can be exposed to other types of bacteria that are much more dangerous. Pneumonia from these types of bacteria are referred to as health-care-associated pneumonia (HAP). Doctors use this information in deciding the most appropriate antibiotic treatment.
People who inhale toxic materials can injure the lungs and cause chemical pneumonia. This is more accurately referred to as chemical pneumonitis, since the process is mainly due to inflammation not from an infectious source.
Fungi can also cause pneumonia. In certain areas of the United States, specific fungi are well known. Coccidioidomycosis, usually seen in the Southwest, is a type of fungal infection that causes a pneumonia called "San Joaquin fever" or "Valley fever." Histoplasmosis (seen primarily in the Midwest) and blastomycosis (seen primarily in the Southeast) are other fungal diseases that cause pneumonias.
The most common way you catch pneumonia is to aspirate bacteria from the upper airway, usually the oral cavity. Other ways to catch pneumonia can be by breathing in infected air droplets from someone who has pneumonia. In some cases, the bacteria can be generated by an improperly cleaned air conditioner or Jacuzzi. Yet another source of infection in the lungs is spread from an infection somewhere else in the body, such as the kidney. Bacteria can enter the bloodstream from any source and be deposited in the lungs, resulting in pneumonia.
The risk of catching pneumonia is determined by the specific bacteria, virus, or fungus, the number of organisms the person inhales, and the body's ability to fight infections.
A person cannot "catch pneumonia" by not dressing properly for cold weather or by being caught in the rain.
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What Are Bacterial Pneumonia Symptoms and Signs?
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Doctors often refer to typical and atypical pneumonias, based on the signs and symptoms of the condition. This can help to predict the type of bacteria causing the pneumonia, the duration of the illness, and the optimal treatment method.
Typical pneumonia comes on very quickly.
Typical pneumonia usually results in a high fever and shaking chills.
Typical pneumonia usually leads to the production of yellow or brown sputum when coughing.
There may be chest pain, which is usually worse with breathing or coughing. The chest also may be sore when it is touched or pressed.
Typical pneumonia can cause shortness of breath, especially if the person has any chronic lung conditions such as asthma or emphysema.
Because chest pain also can be a sign of other serious medical conditions, do not try to self-diagnose.
Older people can have confusion or a change in their mental abilities as a sign of pneumonia or other infection.
Atypical pneumonia has a gradual onset.
It is often referred to as "walking pneumonia."
Sometimes it follows another illness in the days to weeks before the pneumonia.
The fever is usually lower, and shaking chills are less likely.
There may be headache, body aches, and joint pain.
Coughing may be dry or produce only a little sputum. The person may not have any chest pain.
Abdominal pain may be present.
There may be other symptoms, such as feeling tired or weak.
Often the abnormalities on the chest X-ray appear worse than what the patient appears to have clinically, hence the term "walking pneumonia."
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