Dr Darin Detwiler, a leading food safety expert in the US, is wary of what he eats while flying, citing numerous outbreaks of listeria, E.coli, salmonella and even cholera on major airlines over the years. Dr Darin Detwiler, a leading food safety expert in the US, is wary of what he eats while flying, citing numerous outbreaks of listeria, E.coli, salmonella and even cholera on major airlines over the years.