FUT1 and escherichia coli infection: Meijerink et al. [33] had demonstrated that a FUT1 SNP at nucleotide position bp307 (G=>A transition) of the FUT1 open reading farm (ORF) was closely linked to susceptibility to F18+ E. coli infection, and thus genetic variations in this FUT1 M307 SNP can be used as a specific genetic marker for selecting and breeding pigs which are resistant to F18+ E. coli infections [33], [34].