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What else can I help you with?
Why does pollen trigger an allergic reaction in some people?
An allergy is when a person's immune system perceives something that is usually harmless as a threat to the body and launches an attack called an immune response.
Which body system does hives affect?
Hives are the result of an immune system overreacting to an allergen. For example, some people have no problem with penicillin as a medication, but other people react to penicillin, breaking out in hives. The immune system attacks the penicillin, treating it as a foreign substance... which is technically correct, but it isn't the reaction that we necessarily want.
What will an injection containing weakened forms of a disease causing organism usually trigger?
An injection containing weakened forms of a disease-causing organism will typically trigger an immune response in the body without causing the full-blown disease. This immune response helps the body recognize and remember the organism, so it can mount a faster and more effective defense if exposed to the actual pathogen in the future.
Are food allergies due to toxins found in foods?
Allergies are caused by an over-reaction of an individuals immune system to a specific substance which most other people would find harmless.To the person with the food allergy, if a meal contained a substance they were allergic to, they could reasonably consider it a "toxin". However, to every other person without that particular food allergy, it would not be considered a "toxin".As such, "toxins in food" do not cause allergies, but they may trigger them in already allergic individuals.E.g, some people are born with a penicillin allergy. But in most cases this will not bother them, unless they are given penicillin. In this case, they will have an allergic reaction; penicillin is the trigger, rather than the cause of the allergy.
Why does male and female immune systems consider sperm cells to be enemies?
Every cell in an individual's body has specific markers so the individual's immune system will recognize it as "self". Anything that doesn't have the proper "self" markers, will be recognized as foreign and trigger an immune response (this is one of the major reason why after organ transplant, people have to be put on immuno-suppressant therapy). Sperm also have these markers, so upon insemination, it's possible for the sperm to be recognized as foreign and killed off. That usually doesn't happen because there are other components in semen that help to suppress the female's immune response (otherwise, conception would be quite rare). If you collect sperm from semen and wash away them other components, they will trigger an immune response because, again, the sperm will have certain markers that label it as foreign. Hope this helps.
How are people allergic to penicillin?
Lots of people. This is because penicillin has a few strong chemicals that cause some people's bodies to overreact, like hives could happen if the people with penicillin Allergies actually have penicillin which they are not allowed to. I'm allergic to penicillin. :-(
Why are tissues more easily transplanted than organs between people with a minimal risk of rejection by the recipient?
Tissues have fewer antigens than organs, making them less likely to trigger an immune response in the recipient. Additionally, tissues are less vascularized compared to organs, reducing the chance of immune system recognition and rejection. Lastly, tissues can often be transplanted in smaller amounts, decreasing the likelihood of immune rejection.
How many people died before penicillin was invented?
6000 people died from gonerrhea after penicillin and 9000 or more people died before penicillin.
Why take penicillin Skin Tests?
penicillin skin test is to identify people how is a risk of penicillin
Is Erythromycin an antibiotic?
Yes. It's often used for people who are allergic to penicillin.
Is this true or false Allergies or hypersensitivities are normal immune responses?
They're abnormal immune responses - by definition, an allergy is an inappropriate response to a foreign substance. After all, it's not known as an 'allergy' when people's immune systems attack harmful pathogens, despite the body mounting somewhat similar immune responses.
What are the blood types called universal donner?
Blood type O negative is known as the universal donor because it can be safely transfused to people with any blood type. This is because type O negative blood lacks the A and B antigens that can trigger an immune response in recipients.
