BIOL 1550 Lecture Notes - Lecture 12: Human Leukocyte Antigen, Lymphatic Vessel, Lymphadenopathy
7 Dec 2016
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Students who submitted lecture notes: nicole, bleadon, amy, jessica and jaya. Site to be treated:determines method of treatment; harsh chemicals, heat, radiation or combination. Least resistant:bacterial vegetable cells, fungal spores, hyphae, yeasts, enveloped viruses and protozoantrophozoites. Moderate resistance:fungal sexual spores, protozoan cysts, and viruses mostly naked ones. Some of the most resistant viruses include hepatitis b virus and poliovirus. The bacteriapseudomonasspp. ,mycobacterium tuberculosis,ands. aureusalso are moderately resistant organisms. Endospores are considered the most resistant microbial form and when killed other nonpathogenic organisms are killed as well. Most susceptible: enveloped viruses, gram-positive bacteria, nonenvelopedviruses, fungi, gram-negative bacteria, trophozoites. Dormant, highly resistant structures formed by vegetative bacterial cells when unfavorable environment are present. Two phase life cycle: vegetative state and endospores state. Technique to prevent the entry of microorganisms into sterile tissues. Threaten human health by causing infections - tetanus, anthrax, botulism. Commercial sterilizations sufficient treatment with heat to kill clostridium botulinum endospores; used in the food.
