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An adult bed bug, Cimex lectularius, ingesting a blood meal from the arm of a human host.
An adult bed bug, Cimex lectularius, ingesting a blood meal from the arm of a human host.Photo: CDC/Piotr Naskrecki
A bed bug nymph turns darker as it ingests a blood meal.
A bed bug nymph turns darker as it ingests a blood meal.Photo: CDC/Piotr Naskrecki