Lucio Serradas' first sign of trouble came when he and his family awoke during their Christmas vacation last year to discover smears of fresh blood, the size of small coins, on the sheets at their Daytona Beach motel.He suspected it was from bedbugs — a scourge once nearly eradicated that has re-emerged nationally in the past decade. After Serradas, his wife and their two children broke out in itchy rashes back home in Attleboro, Mass., he complained to Florida regulators. "I beg you," he wrote, "to please do something about this."
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