The first suspected locally acquired case of dengue fever in Miami-Dade County was reported Thursday by county health officials. A viral disease that afflicts 100 million worldwide every year, it hadn't been seen in Florida since 1934. "Dengue is a viral disease transmitted by a breed of mosquito common to the southeastern United States and the tropics," the Miami-Dade Health Department said in a news release. "It is not spread from person to person. More than 100 million cases of dengue occur every year worldwide.''