USA and UK S. Enteritidis isolates can be distinguished by STs at MGT4 and MGT5. (a) At MGT4, there were 39 STs (50 or more isolates each) representing 75.1 % of the UK and USA isolates (22191 in total). MGT4-ST99, ST136 and ST135 were prevalent in the USA, MGT4-ST15, ST25 and ST13 were prevalent in the UK, while MGT4-ST15 and ST25 were mixed. (b) MGT4-ST15 and ST25 can be subtyped into multiple STs at MGT5, the majority of which were prevalent in the UK, except for MGT5-ST412 and ST387 which were in the USA.