How are the lungs protected from bacterial infection?

Nose. The cilia in the nasal passages are the first line of defense. The lung itself has macrophages that also destroy invasive bacteria.
Various. You are protected from pulmonary infection by your cough reflex, the mucociliary function of your airways that help clear your lungs, your immune system with function of immune cells in your lungs and your antibody producing cells.

Related Questions

How alveloe in lungs fills with fluid by bacterial infection during pneumonia?

Inflammation. Any tissue, cells in body react with inflammation which bring various cells neutrophils, and others depends on insults. This inflammatory process brings fluids and various inflammatory cells and leads to swelling and edema. You can think of injury of skin and you see swelling, redness and tenderness same way body react differently at variable extent and clear infections depends on your immunity.
Pneumonia. The fluid filling the alveolus, secondary to infection, is quite simply pus/ purulence that develops as white blood cells kill the infectant. A good amount of damage to alveolar cells also occurs due to proteins released from white blood cells designed to recruit more cells to area of infection, creating breaks in cell lining. This causes increased swelling/ fluid leak into air spaces.

What causes lung bacterial infection I am a non smoker?

Nobody knows. We will get a nobel prize if we find out. Check with your doc also.
Bacteria! By definition, bacteria cause bacterial lung infection. Bacteria respond to antibiotics while viruses do not. Viruses are more common than bacteria & cause typical cold which won't respond to antibiotics. Average cough illness lasts 18 days so be patient. Best way to avoid upper respiratory infections (uris) is to wash hands & avoid being sneezed/coughed upon. And don't smoke (which you aren't).
Bacterial contam. Bacteria spred via blood, but would nit target the les only. Bacterial contamination of a break in the skin from scratching, scraped shin or other opening in the skin. Wash ur hands & keep wound clean. Showers & plain ol soap r great. U can add a little antibiotc oint 2 it, minimal.

What's the difference between bacterial pneumonia and a bacterial infection of the lungs?

Not much. Pneumonia is usually used to refer to an infection in the clusters of breathing sacs in the lung. I suppose you could say a bacerial infection of the entry of the lung (tracheitis) could be defined better that way but I have never used it that way. To me they would seem to mean the same thing.

Is amoxicillin good for a bad cough and bacterial infection in my lungs and/or chest?, had cough for 2 weeks, on amoxicillin for 2 days now.

Depends. Whether Amoxicillin works or not depends on what is causing your cough and whether you truly have a bacterial infection in your lungs (pneumonia). If you have had a cough for 2 wks it seems likely this is an atypical pneumonia (mycoplasma, chlamydia or legionella), none of which will respond to treatment with amoxicillin. See an id doctor.
No. A bacterial infection in the lungs would be pneumonia. Amoxicillin would not be a good choice for this because many of the bacteria that cause pneumonia are resistant to amoxicillin. A quinolone like levoquin, a tetracycline like Doxycycline or a combination of a cephalosporin like vantin or Ceftin (cefuroxime) plus zithromax would all be effective for community acquired bacterial infection.

An X-ray said I had a slightly collapsed lung, my gp said just a bacterial infection, to repeat X-ray in 6 weeks I was not given any medication?

Viral? Viral infections are not treated with antibiotics and treatment of a bacterial infection would depend on the bacteria causing the problem. Partial atelectasis, or a slightly collapsed area of lung, is a common finding on xray. Followup chest xray is a good way to make sure it resolves or doesn't get worse.
Unusual. Collapse can mean atelectasis with pneumonia ordinarily antibiotic and some respiratory therapy are indicated if collapse meant pneumothorax, then another course would be appropriate. Really need more clarity of the x-ray findings.

Can a bacterial infection cause a tight chest and mucas?

Possible. Tight chest and mucus could be due to chest infection, asthma, heart failure, gastric reflux. Please consult your doctor http://patient. Info/health/chest-infection http://patient. Info/health/chest-pain-leaflet.

Dr told me I have an atypical bacterial infection (troat), longs hear clear but feel chest pain and urge to cough. Flu like symptoms. Leptospirosis?!!

Wow. You certainly want to check with your doc. Maybe a second opinion is useful? Good luck.
Unlikely. Leptospirosis. For respiratory infections, I suggest chew gum to lubricate the throat, 100 % (!!) no diary, 500 mg 3 X a day for 5 days vitamin C. Good luck.