Pathology 3500 Lecture Notes - Lecture 7: Mouth, Aureus, Prnp
Document Summary
Increased incidence of antimicrobial resistance: reemergence of disease-causing organisms that have been on the decline (ex syphilis, organisms appearing from other parts of the world (ex west nile virus, covid, always on the news: If an organism fulfils all of the postulates it is attributed to that specific disease. Interaction of host and organism: colonization of the host by the organism, proliferation of the organism, tissue injury due to the proliferation of the organism, dissemination and transmission. The organisms: viruses, bacteriophages, plasmids, transposons, bacteria, atypical bacteria, fungi, protozoa, helminths, ectoparasites, prions, obligate intracellular organisms, cell-specific, dna or rna, depend on the host for replication. Illnesses may be: acute (ex cold, flu) Viruses: rapid onset, rapid resolution, chronic (ex hep b) Infection followed by asymptomatic period: ex: mononucleosis caused by ebv. Fungi: rigid cell walls, exist as yeast cells and hyphae, extracellular organisms, and depend on the host for favourable growth conditions, ex candidiasis.
