Broth samples from the outbreak containing MRSA isolates of spa type t015 or t069 were analyzed by the spa-DGGE method. In samples from two individuals, both spa types, t015 and t069, were detected (lanes 2 and 3). In lanes 4 to 7, the samples contain spa type t015, and in lanes 8 to10, the samples contain spa type t069. In lane 1, PCR products from both spa types, t015 and t069, are mixed and analyzed as a control.