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939 Microbiology

A 23year old male had unprotected sexual intercourse with a commercial sex worker. Two weeks later, he developed a painless, indurated ulcer on the glans that exuded clear serum on pressure. Inguinal lymph nodes in both groins were enlarged and not tender. The most appropriate diagnostic test is –

AGram's stain of ulcer discharge
BDark field microscopy of ulcer discharge
CGiemsa stain of lymph node aspirate
DELISA for HIV infection
Microbiology
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942 Microbiology

A thirty-year-man presented with nausea, fever and jaundice of 5 days duration. The biochemical tests revealed a bilirubin of 6.7 mg/dl (conjugated 5.0 mg/dl) with SGOT /SGPT (AST/ALT) 1230/900 IU/ ml The serological tests showed presence of HBsAg , IgM anti HBc and HBeAg . The most likely diagnosis:

AChronic hepatitis B infection with high infectivity
BAcute hepatitis B infection with high infectivity
CChronic hepatitis B infection with low infectivity
DAcute hepatitis B infection with low infectivity
Microbiology
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