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NBME 20 Answers

nbme20/Block 1/Question#27 (24.5 difficulty score)
A 53-year-old woman comes to the physician ...
Schistosoma mansoni 🔍,📺
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 +7 
submitted by monoloco(136),
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nheW yuo aehv a retrlvea woh hsa enettimrtint abdalinmo ypstosmm adn i,aerhard adn how has veartlde to eht slkie fo rhnnrtoe Afirac nda ucs,h isacisShtmoisso seden ot be on oyru rrd.aa tA ,ltsea sa’tht hwo veI’ aerotncodpir shit neggtu oint ym namlet .scpae




 +4 
submitted by strugglebus(165),
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It salo deookl alectxy eikl ocemoshsits on eth -tsd-liei ahd teh eilttl ips.en Enbtamoea woudl ahve had a uhncb of sRBC sdiine.




 +3 
submitted by hellohello(8),

Schistosoma mansoni and haematobium can be ID'd by their unique spines. S. mansoni has a lateral spine as seen on the path while S. haematobium has a terminal spine (S. japonicum has no spine).

See following for path comparisons (mansoni L, haematobium M, japonicum R)

https://www.yourgenome.org/sites/default/files/images/photos/Schistosome%20eggs.jpg

fatboyslim  Schistosoma haemaTobium: spine is on the Tip ("T" for Tip and haemaTobium) and Schistosoma manSoni has a spine on the Side ("S" for manSoni and Side) +3  
kevin  nice +  
thegooddoctor  Excellent explanation! +3  
utap2001  Very brilliant! +  



 +2 
submitted by usmleaspirant5(2),
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itomhcsasoS ash ipnsse wearshe Graiiad tdonse have a peisn