PMC8080464_01
Liver aspirate showing (A) gram-negative bacilli (1000 x) and (B) growth of S. maltophilia on MacConkey agar plate.
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PMC8080464_01_gr1.jpg
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A Gram-stained smear of the abscess material showed plenty of polymorphs (50-70 per low power field) with lots of gram negative bacilli scattered in arrangement (Fig. 1A). Culture on MacConkey agar after 24 h of incubation yielded pure growth of non-lactose-fermenting colonies (Fig. 1B) consisting of oxidase-negative, motile, gram-negative rods identified as Stenotrophomonas maltophilia by the VITEK-2  automated microbial identification system (bioMerieux, Marcy l'Etoile, France).