Doctor insights on:
How Does The Immune System Respond To Pathogens
Respond or cured ?: If you mean in the middle ear, that varies. Once there is any fever or pain there are local chemical factors released that are part of the immune response. Viral agents would likely be cleared within a week, while bacteria could be walled off & cleared in 8-12 weeks. However, sometimes these become chronic, can erode bone or form an abscess. ...Read moreSee 1 more doctor answer
Lymph nodes: Latin lympha "water goddess" - lymph is essentially recycled blood plasma. The lymphatic system returns the interstitial fluid to the thoracic duct and then to the bloodstream, where it is recirculated back to the tissues.Tissues with lymphedema are at risk of infection and ulcer. The lymph reaches the lymph nodes where infection and cancer cells are seperated and processed by the body. ...Read more
Bronchitis: As with any infection, it may take a couple of weeks to fight a novel pathogen, or more quickly if it is from one that has attacked before. Bacterial bronchial infections should be treated with an antibiotic as it helps to hasten the resolution. If the infection is from a virus, it will usually resolve on its own. Asthma, smoking, or structural problems can complicate the problem. ...Read more
Two stages: Natural Killer cells are the first immune step that seeks out the malaria to mark it for the body to "kill" it. A second step is the T cell that also seeks the genetic marker of the malaria to flag it for a "kill". Since malaria invades natural cells of the body it can begin to hide from the immune system and replicate. Consider vaccination if traveling in high risk areas with malaria. ...Read more
Infections good/bad: Can be good or bad. Germs (viruses, bacteria, parasites, etc) stimulate one or more response(s) by immune system to isolate and destroy the "attacker" which is usually good. However that immune response may be excessive leading to disease (ie autoimmune illnesses) bad. The improvement in childhood health may be contributing to the increase in allergy, the hygiene hypothesis, usually a negative. ...Read more
Complicated: Natural killer cells can recognize tumor cells and virally infected cells and destroy those. T-cells and antibodies to markers on tumor cells may also destroy tumor cells. Unfortunately, most of the time, some cancer cells evade this destruction and continue the disease process. The hope and potential of immune therapy remains to be realized. ...Read more
Filter of sorts: The fluid that bathes the tissues of the body gets collected by the lymphatic system like a drain (it eventually goes back into the blood circulation). Bugs, inflammatory chemicals, and/or immune cells will also enter the lymph from the tissues and go to lymph nodes, which are like strategically placed checkpoints. The nodes contain immune cells that become activated and help fight the infection. ...Read more
Heard to simplify.: Like a complicated orchestra plays a difficult score. Different germs produce different responses. There are is nonspecific and specific immune responses. Even the skin oils, saliva, stomach acid tears and sweat are important here. It is much to difficult to quickly answer which is why i taught a course taking 20 hours on the subject to medical students. ...Read more
Yes: Our immune system is constantly fighting off invaders . If you already have the antibodies in the system for that particular organism, you will likely recover sooner. That's why you should be sure that your immunization be updated. If your immune system is really abnormally, you may need regular gammaglobulin replacement. ...Read more
Intriguing: We don't know how or why infection with nematodes minimizes the chance of developing autoimune diseases such as crohn's or ulcerative colitis. Preliminary research indicates an interacton between t-helper cells (part of immune system) and nematodes. More research is underway. ...Read more
Broad question: The immune system tailors it's response to various viruses and to various bacteria in several different ways that can be quite complex depending on how far you want to drill down. Some viruses are destroyed by specialized cytotoxic cells that kill the infected host cell thereby reducing viral replication. Some bacteria are lysed by a combination of antibodies and other blood components. ...Read more
How do human diseases caused by bacteria react to antibiotics? How does that compare with how viruses react to antibiotics?
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