EESA10H3 Lecture Notes - Lecture 7: Infectious Mononucleosis, Human Papillomavirus Infection, Latent Tuberculosis
13 Aug 2017
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Document Summary
Infectious diseases are host-centric (human centric); human body = habitat and host to many organisms. Associations that harm or bother us are infectious diseases; agents are pathogens. There are special illnesses referred to as zoonosis- which are infectious diseases transmissible to humans from other animals; those animals that are in close proximity to humans. Bacteria (unicellular; most not parasitic aerobic vs anaerobic; or tolerate either some form spores) and viruses (strand of dna or rna; parasitic). Bacteria can be both aerobic (requiring air) or anaerobic (without oxygen). Bacteria have an organized cell but not a nucleus; there is genetic material inside the cell. In challenging conditions such as different temperatures/acidity, bacteria can form spores (survival dormant state) and wait for the environment to return to normal. Protozoa are single-cell; microorganisms and are much bigger in size than bacteria. Worms are multicellular and can vary in sizes. In terms of pathogens, viruses are the smallest, then its bacterium and then protozoa.
