PUBH 3132 Lecture Notes - Lecture 2: Protozoa, Passive Immunity, Aureus
Document Summary
Associations that harm of bother us are infectious diseases. Zoonosis: infectious disease transmissible to humans from other animals. Viruses: strand of dna or rna, parasitic. Prions: abnormally shaped proteins found on nerve cells, cause degenerative brain diseases. Active immunity: first exposure to antigen, body produces antibodies. If enough members of a group are immune, hard to maintain chain of infection. Evolution of strategies for managing transmission of disease. Quarantine: separation of persons who have been exposed. Via soil and by hand to mouth transmission. Non fecal organisms transmitted in water or soil. Illness may result directly from infections or from a bacterial toxin. Bacteria acting on amino acids in food. Toxin not denatured by heat or cold. Widely banned after wildlife effects and human risk appreciated. Chronic irritation can lead to cell proliferation. Infectious causes of cancer account for 18% of cancers. Us regulatory framework for managing infectious disease.
