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Difficulty: HardInfectious Diseases

Match each clinical vignette describing a zoonotic or vector-borne infection with its most appropriate targeted antimicrobial therapy.

  • A 45-year-old slaughterhouse worker presents with months of undulating fever, profuse night sweats, and hepatosplenomegaly. Blood cultures grow slow-growing, Gram-negative coccobacilli.Doxycycline and rifampin
  • A 52-year-old sheep farmer presents with subacute, culture-negative infective endocarditis. Serology reveals highly elevated Phase I IgG antibodies.Doxycycline and hydroxychloroquine
  • A 38-year-old landscaper in Missouri presents with a painful, punched-out skin ulcer with a black base on the hand and severe regional axillary lymphadenopathy.Intravenous gentamicin
  • A 40-year-old hiker in New York presents with fever, jaundice, and hemolytic anemia. Peripheral blood smear reveals intraerythrocytic pleomorphic ring forms and tetrads.Atovaquone and azithromycin
  • A 25-year-old camper in North Carolina presents with fever, severe headache, and a petechial rash that began on the wrists and ankles before spreading to the trunk.Doxycycline monotherapy

Answer

Brucellosis matches with doxycycline and rifampin; Q fever endocarditis matches with doxycycline and hydroxychloroquine; Tularemia matches with intravenous gentamicin; Babesiosis matches with atovaquone and azithromycin; Rocky Mountain spotted fever matches with doxycycline monotherapy.
Each matching pair correctly identifies the gold-standard antimicrobial regimen for the specific zoonotic or vector-borne disease described in the clinical vignette, reflecting current infectious disease guidelines.

Step-by-Step Solution

1
Analyze each clinical vignette to identify the causative zoonotic or vector-borne pathogen.
Pathogens identified: 1) Brucella spp., 2) Coxiella burnetii, 3) Francisella tularensis, 4) Babesia microti, 5) Rickettsia rickettsii.
Accurate diagnosis based on classic epidemiological exposures and clinical hallmarks is required before selecting pharmacotherapy.
2
Determine the first-line, standard-of-care antimicrobial regimen for each specific pathogen.
Brucella requires Doxycycline + Rifampin. C. burnetii endocarditis requires Doxycycline + Hydroxychloroquine. F. tularensis requires an aminoglycoside (Gentamicin). Babesia requires Atovaquone + Azithromycin. R. rickettsii requires Doxycycline monotherapy.
Vector-borne and zoonotic infections have highly specific treatment guidelines that often deviate from standard broad-spectrum empiric antibiotics.
3
Map the identified definitive therapies to the provided list of options.
Each pathogen is successfully matched to its corresponding targeted regimen.
This confirms mastery of matching classic ID syndromes with their definitive management.

Key Concept

Targeted antimicrobial therapy for endemic zoonotic and vector-borne infections based on distinct clinical and epidemiological presentations.
Estimated Time:2m 0s
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Topics

Infectious Diseases

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