Does an antigen specify what pathogen an orangism is?
In my notes it gives a defination of Antigen. But I am unsure, please confirm my understanding:
Pathogens are; cell surface markers molecules, often surface protein or glycoprotein, and they trigger an immune response. So they are like the antigen on our cells in the body? but are our cell antigen all unique for individual cells? or individual for each type of cell? THANKS!
A pathogen is an organism that causes disease.
Antigens are surface markers that are recognized by the immune system.
1. All cells (whether of humans, pigs, oak trees, or bacteria) and viruses have antigens on their surfaces. And there are an incredible number of specifically different antigens.
2. Different cells, including the different cells in each person's body, have different specific antigens.
3. My immune system recognizes foreign antigens, that is, antigens that are different from mine, and the "immune response" acts to destroy those foreign antigens - and the cells that they are part of.
A pathogen is a microbe or microorganism such as a virus, bacterium, prion, or fungus that causes disease in its animal or plant host.There are several substrates including pathways wherein pathogens can invade a host; the principal pathways have different episodic time frames, but soil contamination has the longest or most persistent potential for harboring a pathogen.