Gram Negative Bacteria Flashcards
List two important gram negative COCCI species?
- Neisseria species
- Moraxella Catarrhalis
List 2 neisseria species
- Neisseria Meningitidus
- Neisseria Gonorrhoeae
What does neisseria meningitidus cause?
Meningitis
What can neisseria meningitidus be grown from for diagnosis?
- Blood
- CSF
What does neisseria gonnorhoeae cause?
- Urethritis in men
- Pelvic inflammatory disease in women
How is neisseria gonnorhoeae spread?
- Sexual contact
What does morexella catarrhalis cause?
- Respiratory tract infections
Name 3 clinically significant gram negative bacilli species
- Escharchidia Coli
- Salmonella species
- Shigella
What effect on lactose does E.Coli have?
Ferments lactose
How many different serotypes of E.coli are there?
160
What are the 160 different serotypes based on?
The O antigen
How do the different strains differ from each other?
- Some are more infectious
- Some are more virulent
What two conditions do E.Coli species commonly cause?
- UTIs
- Neonatal sepsis
What does enterotoxigenic E.Coli cause? (Hint: look at the name)
Travellers diarrhoea
What 2 conditions does enterhaemorrhagic E. Coli cause?
- Bloody diarrhoea
- Haemolytic uraemia syndrome
What effect do salmonella species have on lactose?
- Do not ferment it
What does salmonella enterica cause?
- Enterocolitis (with or without bloody diarrhoea)
What is enterocolitis?
Inflammation of the small intestine and colon
What does salmonella typhoi cause?
- Typhoid fever
How can salmonella typhoi be isolated?
Blood samples
What effect does shigella have on lactose?
Doesn’t ferment it
How does shigella enter the body?
Faecal oral route
What does shigella cause?
Bacillary dysentery
What is the only strain currently found in the UK of shigella?
Shigella Sonnei
