+- USMLE Forum - Largest USMLE Community (https://www.usmleforum.com)
+-- Forum: USMLE Forum (https://www.usmleforum.com/forumdisplay.php?fid=1)
+--- Forum: Step 1 (https://www.usmleforum.com/forumdisplay.php?fid=2)
+--- Thread: HBV.....Qs - maryam2009 (/showthread.php?tid=597537)
HBV.....Qs - maryam2009 - ArchivalUser - 07-08-2011
1.Carrier marker?
2.Recovery marker?
3.Window period marker?
4.vaccine marker?
5.Infected marker?
0 - ArchivalUser - 07-08-2011
and plasma duration of these markers?
0 - ArchivalUser - 07-09-2011
1.presence of HBsAg in serum for six months or longer after recognition....
2.Anti-HBs Ag IgG /or Anti-HBc IgG
3-IgM Anti-HBc when HBs Ag has been cleared and Anti-HBs is not yet detected.
(IgM HBcAb indicates recent disease ,and IgG HBcAb sinifies chronic disease)
4.Anti-HBsAg and no HBs Ag
5.HBe Ag detectable shortly after the apperance of HBs Ag and indicates viral replication and infectivity
Anti-HBe..marker suggests the cessation of active viral application and low infectivity
0 - ArchivalUser - 07-09-2011
3- window period apears after almost 2 months so it is mostly IgG HBcAb
4- and no IGg HBcAb ( which stays for a while in recovered HB B patient)
Thanks alot though
0 - ArchivalUser - 07-09-2011
@Raif
3.the best tool for diagnosis of an acute HBV infection during the window is the presence of anti-HBc IgM.