Lecture 4: Gram-negative bacteria II Flashcards
What are the three truly pathogenic enterobacteriaceae?
Salmonella
Shigella
Yersinia
What do all three truly pathogenic enterobacteriaceae synthesize?
Type III secretion systems.
What characteristics does salmonella have?
They are gram-negative and facultatively anaerobic.
Predominantly motile via peritrichous flagella
All species are pathogenic to both humans and animals
It has a complex cycle of transmission.
Where is salmonella distributed?
(What are the main reservoirs?)
- The intestinal tract of birds and animals.
- Sewage, fertilisers and slurry
- Animal feeds
- Human carriers
What consumable products can carry salmonella?
Meat and meat products
Milk and milk products
Eggs and egg products
Fish
Confectionary
Dried yeast
Marijuana
Peanut butter
What clinical features does salmonella produce?
What causes the pathogenicity of salmonella?
Name a specific type of salmonella.
Salmonella typhi.
What are the characteristics of Shigella?
- It is gram-negative
- Non-spore forming
- Rod-shaped (bacilli)
- Closely related to E. coli and Salmonella
What diseases does Shigella cause?
How is Shigella classified?
What is the pathogenesis of shigella?
What are the characteristics of Yersinia?
What are the 3 most notable
What disease was caused by Yersinia pestis?
The Black Death/The Bubonic Plague.
