We describe a hospital infestation by 2 hematophagous ectoparasites of cliff swallows that nested in the window eaves. Breaks in window seals allowed entry of swallow ticks and swallow bugs. These pests emerged in large numbers in patient rooms, hallways, and stairwells; 17% of the ticks fed on humans.
Keywords: Argas cooleyi; Oeciacus vicarius; cliff swallow; hospital infestation; swallow tick.
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