MIC 320 Final: Micro Final Study Guide
1 Dec 2016
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Document Summary
Mouth anus: more specific definition: Stomach, small and large intestine: small intestine has 3 parts. Duodenum jejunum ileum: gi associated organs. The small intestine: some pathogens enter through small intestine at peyer"s patch. The site where most microorganisms enter the hosts. M cells ingest bacteria, viruses and other antigens and hand over these organisms to the macrophages. A disease cause by the presence of viable, usually multiplying organisms. Types of organisms involved: bacteria: salmonella, campylobacter, c. perfringens, etc, viruses: hepatitis a, norwalk, etc, protozoa: giardia lamblia, toxoplasma gondii. etc, parasites: trichinella, etc. Infectious agents usually enter through gi tract: gi symptoms: diarrhea, vomiting, nausea, onset: usually delayed (> 4-6 hours); need incubation time. A disease caused by a toxic chemical. Types of organisms involved: bacterial source: staphylococcal enterotoxins, fungi source: mycotoxins, e. g. aflatoxin; mushroom toxins, plant source: potato/solanine; herbal tea/senecio, animal source: puffer fish tetrodotoxin; fish scombroid toxin, algae source: oyster/dinoflagellate/saxitoxin.
