MLT GlobeVirology: Enteric & other viruses – page 4
63 Virology MCQs on Enteric & other viruses with answers and explanations.
Instruments exposed to tissue from suspected Creutzfeldt-Jakob disease need special reprocessing. Which approach is recommended against prions?
Answer: B. 1 N NaOH treatment plus autoclaving at 134 °C
Prions resist routine sterilisation, alcohol and UV. Guidelines use prolonged high-temperature autoclaving (134 °C) combined with NaOH or sodium hypochlorite, or discard instruments.
ID LG-VIR-0152 · Found a mistake? Report it
Which enterovirus is linked to outbreaks of severe respiratory illness and acute flaccid myelitis in children?
Answer: B. Enterovirus D68
EV-D68 is acid-labile and respiratory, and caused 2014-2018 outbreaks associated with AFM. EV-A71 and coxsackie A16 cause hand-foot-mouth disease; echovirus 30 aseptic meningitis.
ID LG-VIR-0191 · Found a mistake? Report it
A pregnant woman has positive rubella IgM and IgG. The IgG avidity is high. This most likely means:
Answer: A. Infection occurred months ago, not recently
IgG avidity increases with time after infection. High avidity rules out recent primary infection; IgM may persist or be falsely positive.
ID MG-VIR-0045 · Found a mistake? Report it
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