Enterohaemorrhagic E. coli
(EHEC) in particular serotype
O157:H7 have in recent years been
associated with numerous high
profile outbreaks of food and with
many sporadic cases of infection
worldwide. EHEC results in serious
illness in about a third of all cases
and chronic complications occur in
smaller number of cases.
 
Complications including
haemorrhagic colitis, haemolytic
ureamic syndrome and thrombotic
thrombo-cytopaenic purpura can
occur. The main sources of
infection are contaminated, raw or
insufficiently heated foods of animal
origin, e.g. meat and dairy products.
 
The reservoir for EHEC is in faeces
of cattle, sheep and goats. These
micro-organisms can enter food
during the processing of meat, dairy
and vegetable products if hygienic
conditions are inadequate. E. coli