Causative organisms Flashcards
Commenest causes of community acquire pneumonia?
- Step pneumonia
- Haemophilus influenza
- atypical mycoplasma pneumonia
Commonest causes of Hospital pneumonia?
- Gram negative bacteria
- Staph aurea
- Anaerobes
- Legionella pneumophilia
Diarrhoea and pseudomembranous colitis are symptoms of overgrowth of which bacterium?
*C. diff
How can we get botulism?
- Ingestion of pre-formed contaminated food
- GI colonisation in infants
- dirty wound
*exotoxin is predicted by clostridium botulinum
What is opisthotonos? Caused by?
- spasm of the muscles causing backward arching of the head, neck, and spine, as in severe tetanus, some kinds of meningitis, and strychnine poisoning.
- Can be caused by tetanus exotoxin
Commonest causes of soft tissue infection?
- Staph aureus
* Strep B
What is the most likely viral causes of diarrhoea and vomiting?
- Noravirus
* Rotavirus
What organisms can cause Guillain-barre syndrome?
*Campylobacter
What causes diarrhoea and haemolytic uraemic syndrome?
*E.coli 0157
What organisms are associated with food poisoning?
- Salmonella and campylobacter = Poultry
- E Coli 0157 =undercooked meat
- Staph aureus =contaminated meat
- Bacillus cereus =reheated rice
What are the most common organisms to cause community acquired lower UTI?
1st, 2nd and 3rd
1st = e.coli
2nd =staph saprophytic (in sexually active females)
3rd =Klebseilla pneumonia
What are the most common causes of surgical site infection following a ‘clean’ procedure?
1st Staph aurea
2nd Strep pyogenes (A)
Most common cause of endocarditis 1 year after heart valve?
coag negative staphylococcus
Most likely cause of late endocarditis?
Viridan’s strep
