Multiplex PCR for species identification of Arcobacter isolates. A multiplex PCR assay (23) was performed to validate the microarray data for species identification of Arcobacter isolates from retail chicken samples as determined by microarray analysis. Lanes M, 100-bp DNA ladder; lane 1, A. butzleri strain RM4018; lane 2, A. cryaerophilus strain RM1582; lane 3, isolate BQ61; lane 4, isolate BQ68; lane 5, isolate BQ123.