All DNA extractions were performed
according to the manufacturer's directions using a DNeasy
Blood and Tissue Kit (Qiagen, Valencia, California). The extracted template
DNA (composed of catfish genomic and bacterial DNA) was used
for pathogen detection, identity confirmation, and quantification using
the primers of Panangala et al. (2007) which were FcFp [50-CCTGTA
CCTAATTGGGGAAAAGAGG-30], FcRp [50-CGGTTATGGCCTTGTTTATC
ATAGA-30] and FAM labeled probe [50-ACAACAATGATTTTGCAGGAGG
AGTATCTGATGGG-30].