A number of athletes at the World Championships have been laid low by stomach upsets with Botswana's Isaac Makwala saying on Monday he was forced to withdraw from the 200m heats because of food poisoning.
Public Health England (PHE) confirmed that 30 athletes and support staff were affected and two cases were confirmed of the bug.
London 2017, the championship organisers, announced on Monday several competitors - staying at the same official team hotel - had suffered gastroenteritis.
Martin, who placed 16th in the 10,000m at the Rio Olympics last summer, competed in the same event at the IAAF World Championships in London last weekend, where she had to step off the track with six laps remaining. That has also been confirmed by Public Health England.
A hotel spokesman added: "We have followed strict hygiene protocol".
However, he was allowed to run a 200m time-trial yesterday which got him into the semi-finals of the race and now looks set to challenge for a medal.
"Those affected have been supported by both team and LOC [Local Organizing Committee] medical staff, in addition we have been working with Public Health England to ensure the situation is managed and contained".
The number of people to have reported illness amid an outbreak of norovirus at the IAAF World Championships has increased to "approximately 40".
"It is highly infectious and with vast numbers of people - athletes, site personnel and visitors - in such close proximity, exposure to affected individuals can not be contained easily".
"After months of consideration, I have made a decision to retire from global athletics", she wrote on Twitter. "I was holding my stomach the entire night".
Olympic champion Elaine Thompson was also physically sick before the 100 metres final on Sunday, though the Jamaican said that was not unusual for her and hadn't had any effect on her below-par performance as she finished fifth.
As he missed the heats on medical advice, however, he would be able to run, if fit.