PMC7995465_01
(a) Irregular margin of the right pinna with an erythematous, crusted edge at presentation. (b) Ulcerated, exophytic nodule on the caudal right tarsus at presentation
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The caudal right tarsus had an ulcerated exophytic nodule with a thin overlying crust (Figure 1).
Impression cytology of the right pinnal and tarsal lesions, revealing amastigotes with rounded nuclei present in macrophages consistent with Leishmania species (arrow)
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Impression cytology of the lesions revealed intracellular amastigotes with rounded nuclei and perpendicularly oriented kinetoplasts, consistent with Leishmania species organisms (Figure 2).
Lutzomyia shannoni sandflies collected in Bryan, Texas, from the residence of a cat infected with Leishmania mexicana. Courtesy of Gabriel Hamer/TAMU Entomology and Alyssa Meyers
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Three female sandflies were collected and stored individually in vials containing 100% ethanol (Figure 3).
Mucosal mass partially occluding the right nostril
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A fleshy pink, slightly eroded mucosal mass, partially occluding the right nostril, was observed (Figure 4) with no purulent exudate.
(a) Right pinnal margin was only minimally irregular with a normal surface. (b) The right tarsal mass was smaller and less ulcerated. (c) There was marked reduction in the size of the nostril mass, to the point that it was barely detectable
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Eight months later, the cat remained solely on artemisinin with both clinical and cytological improvement (Figure 5).