“…All MPs in our sample showed at least some degree of bacterial contamination, different from other previous reports [ 1 , 3 , 5 , 6 , 7 , 8 , 9 , 12 , 13 , 14 , 15 , 16 , 19 , 35 , 38 , 39 , 40 ], but in accordance with some other ones [ 2 , 18 ]. This difference could be explained by the technique we adopted, namely standard methods of environmental microbiology, evaluating mesophilic and psychrophilic flora, through the HPC 37 °C and HPC 22 °C [ 25 , 26 , 28 , 41 , 42 ].…”