Doctor insights on:
How Does Your Body 27s Immune System Defend Itself Against Hepatitis A
Is it true that in certain diseases, the immune system attacks your body - it causes your immune system to produce antibodies against your own tissues?
Yes: Body can make antibodies as well as cells that damage or destroy its own cells and tissues and are the basis for some diseases, e.g., systemic lupus, hemolytic anemia, myasthenia gravis, multiple sclerosis, rheumatoid arthritis and more. See this site for more info. http://www.ncbi.nlm.nih.gov/pubmedhealth/pmh0001819/. ...Read more
How strong is immune system to fight stds without spleen? HPV goes away on own usually, what if no spleen? How does the body react differently?
If you have a auto immune disease such as sjogrens, does that mean your immune system is suppressed? Effecting your body ability to fight off cancer?
Disordered immunity: The problem in most autoimmune disorders is not immune suppression, but immune confusion. Instead of just fighting invading organisms, your immune system also attacks your normal tissues, and this immune response is what causes inflammation and symptoms of the disease. With prolonged chronic immune stimulation, some of the cells may begin to reproduce uncontrollably, causing cancers like lymphoma. ...Read moreSee 1 more doctor answer
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
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
Yes: Not possible but almost a universal occurrence. ...Read more
Immune defense: TheRe are textbooks written about this, this is not the right forum for your question. ...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: By fighting tumor causing viruses, e.G, ebv, hpv, good immune response may prevent the development of tumors. There is a general hypothesis that tumors have antigens not present on normal cells and that immune system may be able to eliminate incipient cancers. However the system is far from perfect as cancers occur all the time. ...Read more
Absolutely: As we grow and develop, we encounter many pathogens that we are technically naive to and develop immunity. Our immune system has innate and adaptive branches that are very capable, however vaccinations are what really protect us from several deadly diseases. Studies of poor children in Mexico City showed that they had a lower incidence of diabetes than wealthy kids, possibly due to oral tolerance. ...Read moreSee 2 more doctor answers
When you have an unfamiliar foreign invader in your body how long does it take your immune system to recognize it?
Depends: The body has innate immune system which recognizes many of the foreign invaders nearly immediately. The acquired immune system is more specifically targeted but the time to develop immunity varies among individuals and the invaders themselves. Overall, one would not expect meaningful immune response at least 10 days and peak response weeks after the exposure. ...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
Interesting ?: The substance injected probably last a few weeks at most. But the response brought about by the vaccine series (all 3 shots) may last forever. I ugh eat checking titters after vaccination in high-risk patients then checking levels again every ten years. Boosters given if needed. ...Read more
Theoretical,unproved: See the following abstract from the national institutes of health: http://www.Ncbi.Nlm.Nih.Gov/pubmed/8281221 it's very technical-just pay attention to the first & last sentences. In summary: obesity may reversibly impair a certain type of white cell (lymphocytes) but clearly, considering that almost half the usa is obese, the effect is minor if it occurs at all. ...Read more
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