Lice infested followed by high fever, severe headache, maculopapular rash starting in axillae.

Lice infested followed by high fever, severe headache, maculopapular rash starting in axillae.

• A. Rocky Mountain Spotted Fever
• B. Leptospirosis
• C. Epidemic Typhus
• D. Typhoid Fever

Answer: (C)

Louse-borne typhus is suggested when there’s lice exposure followed by sudden high fever and severe headache, with a maculopapular rash that characteristically begins on the trunk and often involves the axillary region before spreading outward. The presence of lice points to this louse-borne illness, distinguishing it from other feverish diseases. Rickettsial disease transmitted by ticks, like Rocky Mountain spotted fever, usually starts with a fever and headache but the rash tends to appear first on the wrists and ankles and then migrates to the trunk, often involving the palms and soles—different from the trunk/axillae pattern here. Leptospirosis more often presents with jaundice and conjunctival suffusion rather than a trunk-first maculopapular rash linked to lice. Typhoid fever has a stepwise fever with abdominal symptoms and typically a different rash pattern (rose spots on the trunk) rather than a trunk-to-extremities rash starting in the axillae. So the combination of lice infestation, abrupt high fever, severe headache, and a trunk-to-axillary–oriented maculopapular rash fits epidemic typhus best.

Louse-borne typhus is suggested when there’s lice exposure followed by sudden high fever and severe headache, with a maculopapular rash that characteristically begins on the trunk and often involves the axillary region before spreading outward. The presence of lice points to this louse-borne illness, distinguishing it from other feverish diseases.

Rickettsial disease transmitted by ticks, like Rocky Mountain spotted fever, usually starts with a fever and headache but the rash tends to appear first on the wrists and ankles and then migrates to the trunk, often involving the palms and soles—different from the trunk/axillae pattern here. Leptospirosis more often presents with jaundice and conjunctival suffusion rather than a trunk-first maculopapular rash linked to lice. Typhoid fever has a stepwise fever with abdominal symptoms and typically a different rash pattern (rose spots on the trunk) rather than a trunk-to-extremities rash starting in the axillae.

So the combination of lice infestation, abrupt high fever, severe headache, and a trunk-to-axillary–oriented maculopapular rash fits epidemic typhus best.