AMC MCQ AMC MCQ - Australian Medical Council Multiple Choice Questions Infectious Diseases and Immunology Questions and Answers

Question 1

A 28-year-old traveler returns from Southeast Asia with fever, chills, and rigors every 48 hours.
Blood film shows ring forms and banana-shaped gametocytes.
Which Plasmodium species is most likely responsible?

Accepted Answer

Plasmodium falciparum

Answer

Plasmodium vivax

Answer

Plasmodium malariae

Answer

Plasmodium ovale

Question 2

A 35-year-old HIV-positive patient with CD4 count of 80 cells/µL presents with headache, fever, and meningismus. India ink stain of CSF shows encapsulated yeast. What is the most appropriate treatment?

Accepted Answer

Amphotericin B plus flucytosine

Answer

Fluconazole alone

Answer

Caspofungin

Answer

Voriconazole

Question 3

Which organism is the most common cause of community-acquired pneumonia requiring hospitalization in adults?

Accepted Answer

Streptococcus pneumoniae

Answer

Mycoplasma pneumoniae

Answer

Haemophilus influenzae

Answer

Legionella pneumophila

Question 4

A 22-year-old presents with painful genital ulcers and bilateral inguinal lymphadenopathy. PCR confirms herpes simplex virus type 2. What is the first-line treatment?

Accepted Answer

Valacyclovir

Answer

Foscarnet

Answer

Cidofovir

Answer

Ganciclovir

Question 5

A patient with systemic lupus erythematosus has low C3 and C4 levels. Which component of the immune system is primarily responsible for this finding during active disease?

Accepted Answer

Complement consumption via immune complex deposition

Answer

Natural killer cell activation

Answer

T-cell mediated cytotoxicity

Answer

Mast cell degranulation

Question 6

A 45-year-old immunocompromised patient develops a vesicular rash in a dermatomal distribution with severe pain. Which antiviral should be started within 72 hours?

Accepted Answer

Valacyclovir

Answer

Oseltamivir

Answer

Ribavirin

Answer

Lamivudine

A 28-year-old traveler returns from Southeast Asia with fever, chills, and rigors every 48 hours.Blood film shows ring forms and banana-shaped gametocytes.Which Plasmodium species is most likely responsible?

A 28-year-old traveler returns from Southeast Asia with fever, chills, and rigors every 48 hours.
Blood film shows ring forms and banana-shaped gametocytes.
Which Plasmodium species is most likely responsible?