Salmonella spp. isolation and identification was implemented
following ISO 6579:2002 Amendment 1:2007, Annex D technique,
to determine the prevalence of Salmonella-positive samples. A 25 g
pork sample was weighed using aseptic techniques and stomached
for 120 s with 225 mL of buffered peptone water (BPW; Merck,
Germany). After incubation at 37 ◦C for 24 h, an aliquot of 0.1 mL
of homogenized mixture was transferred to Modified Semi-solid
Rappaport-Vassiliadis agar (MSRV; Oxiod, United Kingdom) and
stored at 42 ◦C for 24 h. The cultures with turbid, grey matter were
streaked on Xylose Lysine Deoxycholate agar (XLD; Oxiod, United
Kingdom) and Brilliant Green Phenol Red Lactose Saccharose agar
(BPLS; Merck, Germany) then incubated at 37 ◦C for 24 h. Finally,
colonies presumptively identified as Salmonella by their black color,
were definitively identified with biochemical and serum agglutination
tests