Effect of Meat Processing on the LAMP Assay
To determine if temperature affects the results of the LAMP
assay for pork, we processed pork samples by frying for
20 min, heated in water at 80 and 100 °C for 30 and 60 min,
autoclaving at 121 °C for 30 min, and microwaving for
20 min. Although Arslan (Arslan et al. 2006) reported that
heat treatment can cause genomic DNA to disintegrate into
small fragments, sufficient DNA was obtained for the LAMP
assay detection (Fig. 5).
We used frying, heat treatment, and microwave ovens to
simulate processing procedures, for comparison with the corresponding
fresh specimens. The processed sample volume
was smaller but was still adequate for DNA extraction and
LAMP assay detection. These results are consistent with previous
reports (Sakalar et al. 2012; Karabasanavar et al. 2014).
However, Buntjer and Brodmann failed to detect target DNA with a PCR assay due to DNA degradation at high temperatures (Buntjer et al. 1999, Brodmann and Moor 2003).