“…Ebringer et al (1 977) found that faecal carriage of klebsiellas in patients with AS was associated with active disease, but other workers could not confirm this observation (Eastmond, Cooke and Wright, 1978;Warren and Brewerton, 1979a). However, Ebringer, Cawdell and Ebringer (1979) and Eastmond et al (1980) showed an association between klebsiella carriage and anterio uveitis but this was not supported by the findings of Warren and Brewerton (1 9 7 9 4 and sequential studies of klebsiella carriage have also produced conflicting results Warren and Brewerton, 1980;Eastmond et al, 1981).…”