Figure 3: Results of specific viral gene PCR. Results were collected from each PCR experiment. A, PRRSV target gene 434 bp; B, PCV2 target gene 353 bp; C, PPV target gene 271 bp; D, PRVgB target gene 194 bp; E, PRVgE target gene 747 bp; F, CSFV target gene 500 bp. M = molecular weight marker (marker sizes are on the left column); 1 = positive control; 2 = negative control; 3 = tissue sample PCR.