BSCI 223 Study Guide - Final Guide: Lectin Pathway, Apoptosis, Aureus
12 May 2016
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Symbiosis: mutualism = both members benefit, commensalism = one member benefits, other is unaffected (difficult to prove, parasitism = parasite benefits, host is harmed. Normal microbiota: organisms that live in and on the body without normally causing disease. Resident from birth to death or transient. Zoonoses = diseases spread from animals to humans: humans. Humans may be asymptomatic carries of infection. Thyphoid mary: nonliving soil, water, food, objects. Invasion/establishment of microbes in hosts: contamination = presence of microbes in or on body, infection = pathogen successfully invades body (may or may not result in disease, different portals of entry (ex. Nose, mouth, mucous membranes: adhesion = pathogens attach to cells via proteins called adhesion factors (aka adhesins) Host-pathogen specificity determined by interaction of adhesins with receptors on host cells. Avirulent = lost ability to make adhesion factors. Disease (aka morbidity = any change from state of health: symptoms (subjective) = patient can feel (ex.
