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UND 363 CNS handling
| Question | Answer |
|---|---|
| specs encountered in histology | brain bx, whole brain, spinal cord, peripheral nerve bx, pituitary gland, skeletal muscle |
| what are transmissible spongiform encephalopathies (TSE's) also know as | Prion disease |
| what is prion disease | fatal degenerative disease (amyloid and/or prion protein depositing on grey matter) |
| what are the the most common TSE's | creutzfeldt jacob disease (CJD in humans), bovine spongiform encepalopathy, scrapie (in sheep) |
| where is the prion disease most common infectivitiy | brain, CNS, Spinal cord, EYE |
| why are TSE's dangerouns | not killed by routine decon. (formalin, etc) biosafety lvl 2 required |
| what are the typical entry routes of tse's | cutaneous/mucous (negligible risk but use care, transcutaneous/mucous (serious risk), CNS exposure (serious risk) |
| where is the highest conc. of prions found | in meninges |
| to avoid skin puncture what can be used | cut resistant gloves |
| what should be done with small bxs | post fixed with formic acid (96%) for 30 min |
| how should liquid waste be disposed of | decon'd in 6N sodium hydroxice |
| what should be done with molds and forceps | decon'd with 1N sodium hydroxide and autoclaved |
| what should be done with knives | decon'd with 2N sodium hydroxide and put in sharps immediately |
| how are work surfaces decon'd | kept wet with 2N sodium hydroxide for 1hr. |
| what should be done with slides of known cases | hand stained and decon'd w/ 2n sodium hydroxide (1hr soak) and then label as infectous CJD) |
| what should be done with the cassettes | they should all be processed manually |