29. A 42-year-old male presents with a persistent febrile illness accompanied by shaking chills, myalgia, and arthralgia. The patient has suffered bouts of this illness for nearly 3 weeks. He suffered a tick bite about 2 months ago but dismissed the event as he removed it immediately. He had likely encountered the tick while out in the woods during a hunting trip to Minnesota. A blood smear revealed the presence of the parasite as shown in the image. Which one of the infectious agents is most likely responsible for the clinical presentation? a. Leishmania spp. b. Toxoplasma gondii c. Babesia microti d. Plasmodium spp. 31. Which of the following laboratory findings would strongly suggest that the fungal specimen demonstrates dimorphism? a. Hyphal growth at 37°C b. Growth in Sabouraud's Dextrose Agar supplemented with olive oil c. Enhanced growth upon supplementation of Sabouraud's Dextrose Agar with cycloheximide d. Growth on a Mannitol Salt Agar plate e. Yeast growth at body temperature (37°C) and hyphal growth at room temperature (25°C)
Added by Kenneth W.
Step 1
Step 1: The infectious agent most likely responsible for the clinical presentation described in the scenario is Babesia microti, which is found in ticks and can cause febrile illness, shaking chills, myalgia, and arthralgia. Show more…
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