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Pneumonitis is a general term that refers to inflammation of lung tissue. It occurs when some irritating substance – solid particles, liquids, gases, radiation or bacteria – cause the tiny air sacs to become inflamed. This can hamper the exchange of oxygen and carbon dioxide in the air sacs. Pneumonia is one type of pneumonitis caused by an infection.

有几种类型的肺炎。它们包括：
•当你吸气（吸）时异物进入你的肺部产生吸入性肺炎。胃内容物，如摄入的食物或液体，是吸入性肺炎的常见原因。意外吸入的小颗粒，例如小片花生或蔬菜，而这种吞咽常见于儿童。
There are several types of pneumonitis. They include:

• Aspiration pneumonitis- occurs when you inhale (aspirate) foreign matter into your lungs. Stomach contents, such as ingested food or liquid, are a frequent cause of aspiration pneuomonitis. Accidental inhalation of small particles, such as tiny pieces of peanuts or vegetables, while swallowing is common in young children.
• Chemical pneumonitis- is a type of aspiration pneumonitis that develops when you inhale chemicals that are toxic to your lungs. Industrial and household chemicals, such as chlorine gas, ammonia, solvents and pesticides can all cause chemical pneumonitis.
• Hypersensitivity pneumonitis- is nicknamed “farmer’s lung,” “mushroom picker’s disease” and other colorful names with good reason. Dust from animal dander, molds and plants, all potential allergens, can provoke an inflammatory reaction in your lungs. Symptoms usually develop within six hours of exposure to the allergen. Some people are more susceptible to developing hypersensitivity pneumonitis than are others, although it’s not certain why.
• Radiation pneumonitis. A few people who undergo radiation therapy for lung cancer, breast cancer, leukemia or lymphoma develop this type of pneumonitis. Taking some types of chemotherapy drugs during radiation treatment may increase your risk of developing radiation-induced pneumonitis.
• Drug-induced pneumonitis. A variety of drugs used to treat other conditions can cause pneuominitis. These include certain chemotherapy drugs, antibiotics, sulfonamides, NSAIDS and the heart medication amiodarone.

• Bacterial pneumonitis- also called bacterial pneumonia. This type of pneumonitis results when bacteria are inhaled and settle in the lungs. The infection causes irritation, swelling, and congestion in the lungs. Bacterial pneumonitis is usually caused by bacteria called either pneumococcus or streptococcus pneumoniae.

A cough and difficulty of breathing are the most common signs and symptoms of pneumonitis you have, but having these problems doesn’t necessarily mean that you have pneumonitis. Specialized tests are often necessary to make a diagnosis.

Medications are used to treat some causes of pneumonitis, but other types of pneumonitis can be cued by simply avoiding the substance that triggers inflammation. Identifying and treating pneumonitis promptly 本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。