according to medbullets link ns ss RNA must carry RNA dependent RNA polymerase (so that is out).
also, according to medbullets there are very few ds RNA viruses, so "most likely" will be ss. Also, RNA-dependent DNA polymerase = Reverse Transcriptase. Since HIV is a ss ps RNA virus with RT, they've described an HIV cousin. not sure beyond this.
the gotdamn trick here is HIV is single standed + sense "diploid". NBME writers are just fuckers. ughhhh
Ok, so RNA dependent DNA polymerase is for reverse transcriptase... single stranded + use RNA dependent RNA polymerase. Can someone explain?
As soon as I saw encephalitis I thought of Flaviviruses which are:
SS ⊕ linear Icosahedral including:
HCV,Yellow fever, Dengue, St. Louis encephalitis, West Nile virus aka meningoencephalitis and Zika virus
p. 167 First Aid 2018
RNA depended DNA polymerase = reverse transcriptase (FA 20 p 38, under telomerase).
Given the virus has reverse transcriptase, it is likely a retrovirus (hepadnavirus also has reverse transcriptase).
Retroviruses are SS+ RNA viruses (FA 20 p 167)
Japanese encephalitis virus according to Dr. Google (ncbi)
I think this was referring to reverse transcriptase, and the only two viruses I knew that used them were HepB and HIV/retroviruses. Given the context I picked HIV/retroviruses which are SS + sense. This was kind of weird though since the virus was “new” ... but I’ve learned that “new” usually means very little on these tests.
My guess is that they are referring to Retrovirus (HIV/HTLV)- a single stranded positive sense linear RNA. Retroviruses are known to carry reverse transcriptase (RNA-dependent DNA-polymerase). The encephalitis is what threw me off cuz I automatically thought of the many negative sense RNA viruses that cause encephalitis (like arenavirus or bunyavirus). Apparently there have been a few causes of HTLV causing encephalitis... maybe this is what they were trying to get at? Idk but i just spent way too much time on this damn question https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5878187/