HOUSTON (MCT) — There’s been an alarming increase in the number of West Nile cases nationwide, with more than 1,100 reported, according to officials from the Centers for Disease Control and Prevention.

The latest CDC figures released Wednesday show the national total for West Nile infections is three times as many as usually seen at this point in the year, officials said. Seventy-five percent of those cases were reported in five states—Louisiana, Oklahoma, Mississippi, South Dakota and Texas—with about half in Texas.