Dysbiosis??

Hi, My son has been having food intolerance issues from birth. He is 9 years old now. We have done numerous tests and all have come out negative. Recently we did a "Faecal microbiology" test that shows that he has an overgrowth of Citrobacter Freundii. The Naturapath we have been seeing says that this could be the cause of his food sensitivities . Please see attached file for test results. Please advise if this is actually a problem that needs to be treated.