“…It is difficult to determine the exact etiology of the diarrhea in these patients, including drug-specific effects (i.e., mycophenolate mofetil, antibiotics, colchicines, laxative drug), metabolic conditions, mechanical complications of surgery, acute GVHD, as well as infectious agents (bacteria, such as Clostridium difficile , Campylobacter jejuni , Shigella sonnei and Salmonella enteritidis and virus, first of all CMV, but also Rotavirus, and parasites, in particular protozoan agents such as Cryptosporidium spp., Blastocystis spp., Giardia duodenalis , Entamoeba histolytica , Entamoeba coli , Endolimax nana , Iodamoeba butschili , Chilomastix mesnili , and Microsporidia spp.) [ 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 , 136 , 137 , 138 , 139 , 140 , 141 , 142 , 143 , 144 , 145 , 146 , 147 , 148 , 149 , 150 , 151 ...…”