Other than scratches, how is cat scratch disease (CSD) transmitted in humans?

Updated: Feb 16, 2021
  • Author: Robert A Schwartz, MD, MPH; Chief Editor: Michael Stuart Bronze, MD  more...
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In approximately 1% of diagnosed cases, no animal scratch is implicated. Person-to-person transmission has not been documented. No evidence exists to suggest transmission from cat fleas to humans. Ticks and biting flies have also recently been recognized as potential vectors. [30] Cases occurring after scratches from thorns, wood splinters, and crab claws have occurred. However, in each of these cases, the patient recalled that a cat licked the abrasion.

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