Pneumonia causes

It happens when an infection causes the air sacs in your Anyone can get this lung infection. But infants younger than age 2 and people over age 65 are at higher risk. That’s because their immune systems might not be strong enough to fight it. You can get pneumonia in one or both lungs. You can also have it and not know it. Doctors call this Lifestyle habits, like Symptoms of Pneumonia Your symptoms can vary depending on what’s causing your pneumonia, your age, and your overall health. They usually develop over several days. Common pneumonia symptoms include: • Chest pain when you breathe or cough • Cough that produces phlegm or mucus • Fatigue and loss of appetite • Fever, sweating, and chills • Nausea, vomiting, and diarrhea • Shortness of breath Along with these symptoms, older adults and people with weak immune systems might be confused or have changes in mental awareness, or they might have a lower-than-usual body temperature. Newborns and infants may not show any signs of infection. Or they might vomit, have a fever and a cough, and seem restless or tired. If you have a new cough, fever, or shortness of breath, call your doctor to ask about whether it could be COVID-19. Illness with the new coronavirus can also lead to pneumonia. Causes of Pneumonia Bacteria, viruses, or fungi can cause pneumonia. Common causes include: • Flu viruses • Cold viruses • RSV virus (the top cause of pneumonia in babies age 1 or younger) • Bacteria called Streptococcus pneumoniae and Mycopl...

Pneumonia is an infection caused by bacteria, viruses, or fungi. It leads to inflammation in the air sacs of one or both lungs. These sacs, called alveoli, fill with fluid or pus, making it difficult to breathe. Both You can also get these types of pneumonia by coming into contact with surfaces or objects that are contaminated with pneumonia-causing bacteria or viruses. You can contract fungal pneumonia from the environment. It does not spread from person to person. Pneumonia is further classified according to where or how it was acquired: • Hospital-acquired pneumonia (HAP). This type of bacterial pneumonia is acquired during a hospital stay. It can be more serious than other types, as the bacteria involved may be more resistant to antibiotics. • Community-acquired pneumonia (CAP). This refers to pneumonia that’s acquired outside of a medical or institutional setting. • Ventilator-associated pneumonia (VAP). When people who are using a ventilator get pneumonia, it’s called VAP. • Aspiration pneumonia. Inhaling bacteria into your lungs from food, drink, or saliva can cause Walking pneumonia The symptoms of walking pneumonia can include things like: • mild fever • dry cough lasting longer than a week • chills • shortness of breath • chest pain • reduced appetite Viruses and bacteria, like Streptococcus pneumoniae or Haemophilus influenzae, often cause pneumonia. However, in walking pneumonia, the bacteria Mycoplasma pneumoniae most commonly causes the condition. Pneumonia s...

Bacteria The most common type of bacterial pneumonia is called Streptococcus pneumoniaegerm that normally lives in the upper respiratory tract. It infects over 900,000 Americans every year. Bacterial pneumonia can occur on its own or develop after you've had a viral cold or the flu. Bacterial pneumonia often affects just one part, or lobe, of a lung. When this happens, the condition is called lobar pneumonia. Those at greatest risk for bacterial pneumonia include people recovering from surgery, people with respiratory disease or viral infection and people who have weakened immune systems. Some types of bacteria cause what is known as "atypical" pneumonia, including: • Mycoplasma pneumoniae, a tiny wide-spread bacterium that usually infects people younger than 40 years old, especially those living and working in crowded conditions. The illness is often mild enough to go undetected and is sometimes referred to as walking pneumonia. • Chlamydophila pneumoniae, which commonly causes upper respiratory infections year-round, but can also result in a mild form of pneumonia. • Legionella pneumophila, which causes a dangerous form of pneumonia called Legionellais not passed from person to person. Outbreaks of the disease have been linked to exposure to contaminated water from cooling towers, whirlpool spas, and outdoor fountains. These bacteria are referred to as "atypical" because pneumonia caused by these organisms might have slightly different symptoms, appear different on a che...