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Difficulty: MediumMedical History Evaluation

A thorough medical history, particularly regarding occupational and recreational exposures, is critical for establishing the correct infectious disease diagnosis. Match each patient's specific exposure history to the infectious disease diagnosis it most strongly suggests.

  • A 34-year-old patient who recently explored bat-inhabited caves in the Ohio River Valley before developing fever and a dry cough.Histoplasmosis
  • A 42-year-old abattoir worker who presents with a flu-like illness after handling sheep placental tissues during the lambing season.Q fever
  • A 28-year-old patient who develops acute respiratory distress a week after sweeping out a rodent-infested cabin in rural New Mexico.Hantavirus pulmonary syndrome
  • A 50-year-old hunter who presents with fever and an ulceroglandular lesion shortly after skinning wild rabbits.Tularemia

Answer

The correct pairings link specific geographic, recreational, and occupational exposure histories to their classic infectious disease presentations: cave exploration links to Histoplasmosis, sheep placental tissue handling links to Q fever, rodent-infested cabin cleaning links to Hantavirus, and rabbit skinning links to Tularemia.
Each correct pairing directly relies on obtaining a meticulous medical history regarding recent travel, occupational hazards, and recreational hobbies. The historical clues (bats/caves for Histoplasmosis, sheep/placentas for Q fever, deer mice/sweeping for Hantavirus, and rabbits/skinning for Tularemia) form the foundational basis for establishing the differential diagnosis.

Step-by-Step Solution

1
Analyze the first patient's recreational history and geographic location.
The patient explored bat-inhabited caves in the Ohio River Valley.
This is the classic exposure history for Histoplasma capsulatum, a fungus found in soil enriched with bat or bird droppings in endemic regions.
2
Evaluate the occupational history of the second patient.
The patient is an abattoir worker exposed to sheep placental tissue.
Exposure to livestock birth products is the primary risk factor for inhalation of Coxiella burnetii, which causes Q fever.
3
Assess the environmental exposure of the third patient.
The patient swept a rodent-infested cabin in New Mexico, followed by severe respiratory symptoms.
Aerosolization of deer mouse droppings in the Southwestern US is the hallmark historical clue for Hantavirus pulmonary syndrome.
4
Review the recreational history and physical presentation of the fourth patient.
The patient skinned wild rabbits and developed an ulceroglandular lesion.
Direct contact with infected animal tissues (especially rabbits) is a major transmission route for Francisella tularensis.

Key Concept

Epidemiological and Occupational Medical History
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Topics

Medical History Evaluation

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