Number of isolates that have the potential to produce one or more BA enzymes (ODC – ornithine decarboxylase, AgDI – agmatine deaminase, HDC – histidine decarboxylase and TDC – tyrosine decarboxylase), by screening of the correspondent gene. 52% of the studied isolates amplified only the agdi gene, 17.9% only the odc gene and the same percentage the hdc gene while only 6 (10.7%) amplified the tyrd gene. Regarding isolates that amplified three genes only 1.8% amplified for odc, hdc and tyrd and 1.8% for the agdi, tyrd and odc. Amplification of agdi and odc was achieved by 3.6% of isolates, 1.8% for the hdc and tyrd, 10.7% for agdi and hdc, 5.4% for odc and hdc and 3.6% for odc and tyrd. None of the isolates amplified the four genes