Infectious Diseases: A brief Introduction
Infectious Diseases Infectious diseases are illnesses brought on by pathogens—dangerous organisms—that enter your body from the outside. Infectious disease-causing pathogens include viruses, bacteria, fungi, parasites, and, in rare cases, prions. Types Viral, bacterial, parasitic, or fungal infections can all cause infectious illnesses. Transmissible spongiform encephalopathies (TSEs) are an uncommon class of infectious disorders. Viral Infections The DNA or RNA that makes up viruses is enclosed in a protective capsid. Viruses cannot replicate on their own because they are considerably smaller than your cells. They enter your cells and use the equipment inside to replicate themselves. Bacterial Infections Bacteria are single-celled organisms with a little bit of DNA that contains all of their instructions. There are bacteria everywhere, even on our skin and inside of our bodies. Numerous bacteria are beneficial or even benign, but some of them produce toxins that can make you ill....