A 35-year-old male anesthesiologist presents to the occupational health clinic after a needlestick exposure while obtaining an arterial line in a patient with cirrhosis. In addition to a standard bloodborne pathogen laboratory panel sent for all needlestick exposures at his hospital, additional hepatitis panels are ordered upon the patient's request. The patient's results are shown below: HIV 4th generation Ag/Ab: Negative/Negative Hepatitis B surface antigen (HBsAg): Negative Hepatitis C antibody: Negative Anti-hepatitis B surface antibody (HBsAb): Positive Anti-hepatitis B core IgM antibody (HBc IgM): Negative Anti-hepatitis B core IgG antibody (HBc IgG): Positive What is the most likely explanation of the results above?
AWindow period
BChronic infection
CAcute infection
DImmune due to infection
EImmune due to vaccination
A 26-year-old woman who is a medical student is undergoing evaluation after sticking herself with a needle while drawing blood from a patient. The patient’s medical history is unknown. A blood sample from the medical student is drawn and processed, and the results are presented below: Anti-HAV IgM negative Anti-HAV IgG positive HBsAg negative HBeAg negative Anti-HBs negative Anti-HBc IgG negative Anti-HBc IgM negative Anti-HBe negative Anti-HCV negative What is true about the student’s laboratory findings?
AShe has not been vaccinated against the hepatitis B virus.
BShe recovered from a hepatitis B virus infection.
CShe is infected with the hepatitis D virus.
DShe can transmit the hepatitis A virus.
EShe is an asymptomatic carrier of the hepatitis B virus.
A 52-year-old female presents to her primary care physician for medical evaluation prior to an elective hip replacement surgery. She has hypertension and diabetes, both of which are well controlled on oral medications. She also admits to occasional use of recreational injection drugs so a panel of serologies are obtained. Based on the results, the patient is found to have had a previous infection with hepatitis B from which she has fully recovered. Which of the following is a characteristic of the immunoglobulin subtype that most likely binds to hepatitis B core antigen in this patient?
AIt exists as a dimer
BIt is only activated by multivalent immunogens
CIt exists as a pentamer
DIt activates mast cells
EIt exists as a monomer
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