BIOL 3070 Study Guide - Final Guide: Clostridium, Exanthem, Herpesviridae
8 Dec 2017
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Spreading infections impetigo when confined to epidermis, erysipelas when involving dermal lymphatics, cellulitis when major focus is subcutaneous layer. Solid, raised lesion, >1 cm diameter in epidermis, dermis, or subcutaneous tissue. Circumscribed, elevated, superficial, solid lesion, greater than 1 cm in diameter. Raised lesion containing clear fluid, < 1 cm diameter. Circumscribed, inflamed, elevated papules/plaques, often w erythematous borders, pale centre. Describe smallpox, including the causative agent, illness, how it can be prevented, and how it was eradicated. Smallpox= variola virus (orthopoxvirus); has enveloped dsdna virus. (related to cowpox, monkey pox). Transmission= respiratory, infects internal organs and enters blood stream. Eradication= from natural existence through human intervention. Criteria for eradicating a pathogen= humans are sole reservoir, effective vaccine available, disease easily diagnosable (no latent/asymptotic in humans). Vaccinia was used as a vaccine for variola. (much milder disease) gives immunity to small pox.
