GI infections Flashcards
Listeria Monocytogenes:
Gram stain
symptoms
Antibiotics
Gram negative
Watery diarrhoea, cramps, fever, tumbling motility
Ampicillin, ceftriaxone, cotrimoxazole
E.coil: Gram stain Contraction Symptoms: enterotoxigenic, enterohaemorrhagic, haemorrhagic uremic syndrome Antibiotics
Gram negative rod Contaminated food, water, lakes ETEC- toxigenic, travellers EHEC- haemorrhagic HUS- anaemia, thrombocytopenia, renal failure Antibiotic- ciorifloxane
Giardia Lamblia: Shape Contraction Symptoms Microscopy Antibiotic
Pear shaped Travelers, hikers, MSM Found smelling, non bloody steatorrhoea Cysts on microscopy Antibiotic- metronidazole
Staphylococcus Aureus :
Gram and shape
Symptoms
Antibiotics
Gram positive cocci, grape like clusters
Vomiting and diarrhoea 12-24hrs after food
No abx needed
Salmonella typhi
Symptoms
Antibiotics
Slow onset fever, constipation, splenomegaly , rose spot rash
Ceftrizone or ciprofloxane
Shigellae
Symptoms
Antibiotics
Non motile, non h2s producers, bloody diarrhoea
No abx
Campylobacter jejuni Microscopy Contraction Symptoms Associations Antibiotics
Non motile, oxidative positive Dog faeces Watery, foul smelling, bloody stool Associated with Gbs and Reiters Erythromycin or ciprofloxacin
Entamoeba Histolytica:
Microscopy
Association
Antibiotics
Motile trophozoite
Flask -shaped ulcer
Liver abscess formation
Abx: Metronidazole + paromomycin
Cryptosporidium Parvum
Symptoms
Kinyoun acid fast stain
Antibiotic
Severe diarrhoea in immunocompromised
Oocysts on modified Kinyoun acid fast stain
paromomycin
Clostridium botulinum
Contraction
Symtoms
treatment
Canned/vacuum packed foods
Descending paralysis
Preformed toxin
Antitoxin
Clostridium perfringens
Contraction
Symtoms
treatment
Reheated meals
Gas gangrene
Watery diarrhoea + cramps
Antitoxin
Clostridium difficile
Secretion
Causes
Treatment
Exotoxin A and B Pseudomembranous colitis Post abx in hospital 10-14/7 PO metronidazole PO vancomycin
Bacillus cereus
Microscopy
Contraction
Tratment
Gram pos rods
reheated rice
no antibiotics needed
Salomella enteritides
Contraction
Symtoms
Treatment
Non-lactose fermenter
Poultry, eggs and meat
Self-limiting non bloody diarrhoea
Mx: ceftriaxone or ciprofloxacin
Yersinia enterocolitis
Associations
Entercolitis w mesenteric adenitis Cold enrichment Erythema nodosum Reactive arthritis Necrotising granulomas
