Infectious Diarrhoea Flashcards
what is the most common food borne pathogen?
campylobacter
when is it classed as gastro-enteritis?
3 or more loose stools a day
assessing the patient?
symptoms and duration
risk of food poisoning
assess hydration
features of inflammation
fluid and electrolyte loss risk?
hyponatremia due to sodium loss
hypokalaemia due to K loss in stool
investigations? (5)
stool culture blood culture renal function blood count - evidence of infection abdominal XR/CT if distended
differential diagnosis? (3)
carcinoma
IBD
sepsis outside the gut
campylobacter gastroenteritis main points?
up to 7 days incubation
stools negative within 6 weeks
abdominal pain can be severe
post infection sequelae - Guillain-Barre
most common campylobacter species?
c. jejuni
c. coli
salmonella gastroenteritis main points?
onset usually less than 48 hours after exposure
diarrhoea usually lasts less than 10 days
20% still have +ve stools at 20/52
salmonella gastroenteritis after effect?
post-infective IBS common
salmonella gastroenteritis species?
s. enterica
s. bongori
salmonella gastroenteritis common isolates in the uk?
salmonella enteritidis
salmonella typhimurium
E.Coli O157 typical illness characteristic?
frequent bloody stools
E.Coli O157 produces?
Shiga toxin which can get into blood
what can shiga toxin cause?
haemolytic-uraemic syndrome (HUS)
