HSS 1100 Lecture Notes - Lecture 1: Human Microbiota, Central Nervous System, Microbiota

• School: University of Ottawa
• Department: Health Sciences
• Course: HSS 1100
• Professor: Franco Pagotto

Document Summary

Study of our protection from/response to foreign macromolecules or invading organisms. Viruses/chlamydia (can only exist in living cells) Made of nucleic acid (either rna or dna), surrounded by capsid (protein shell) How they replicate: attach to living cell, inject their own nucleic acid (penetration), highjack synthetic processes inside cells to create more viruses, package, exit, mature. Pathogens have levels 1-4; level 4 pathogens are all viruses. Rigid cell wall (not all), circular chromosome, no nucleus, have both dna and rna. How they replicate: binary fission (1 bacterium extends and then pinches into two separate bacteria) Not all bacteria are bad can be useful in many industries: environment (bioremediation, biotechnology, breakdown vitamins within the human body, protect against bad bacteria, etc. Resident flora we always have it (from birth) Transient flora acquired when normal flora is disturbed (maybe due to an illness), and transient flora must come in.