PSL301H1 Lecture Notes - Lecture 2: Mannose, Complement Component 5A, Natural Killer Cell

• School: UTSG
• Department: Physiology
• Course: PSL301H1
• Professor: Michelle French

Document Summary

Hiv patients whose immune systems are comprised are much more prone to different cancer types than healthy individuals. Parasitic worms blood, gi tract, eye, malaria protozoan. Fungi vaginal yeast infection, throat yeast infection. Protozoa sleeping sickness in the blood. Bacteria (cells) inside and outside cells. Can survive and reproduce outside the host. Most bacteria are killed by drugs known as antibiotics. Dna or rna based and can be either double stranded or single stranded. Coated by their own encoded proteins and in certain cases an extra envelope layer budding off from the host membrane with embedded glycoproteins that have attachment specificity (e. g. influenza binds epithelial cells lining the respiratory tract) Viruses cannot be killed via antibiotics, certain viruses can. How do we defend against pathogens? be treated with antiviral drugs. Physical barriers skin, mucous, acid, lysosome (on tears, helps break down bacteria cell wall) If the first line of defense fails, then the internal immune response takes over (innate, adaptive)