A study was made of the incidence of Campylobacter upsaliensis among dogs a
nd cats suffering from acute or chronic diarrhoea; 225 dogs and cats were e
xamined and 51 strains were identified, 16 (7%) of which were Camp. upsalie
nsis. When rectal swabs were taken from a control group of 126 dogs and cat
s without clinical symptoms, 19 Campylobacter spp. and four Camp. upsaliens
is were identified. All the Camp. upsaliensis strains were isolated in dogs
. The Campylobacter strains were identified on the basis of their biochemic
al characteristics and by PCR (polymerase chain reaction).