L. fermentum was not found in C. idella C fish. However, the presence of L. fermentum was found in T1, T2 and T3 fish as evidenced by a 700 base pair PCR product. Lane (a) shows a base pair ladder; lanes (b-d) show the lack of PCR products from samples from the C group fish; lanes (e-g), (h-j) and (k-m) show the obtained PCR products from the T1, T2 and T3 fish groups, respectively.