Flashcards in Bacterial Disease Deck (16):
What type of bacteria do you find in the small intestine?
Give some examples of bacteria and viruses that use the upper respiratory tract as a portal of entry.
Give some examples of intrinsic bacteria that can infect via the urogenital tract.
Give some examples of extrinsic bacteria that can infect via the urogenital tract.
Give examples of bacteria that can infect via broken skin.
State some consequences of infection via broken skin.
Give some examples of bacteria and viruses that infect via the gastrointestinal tract.
What are some consequences of infection via the gastro-intestinal tract?
What two main factors affect pathogenecity?
Infectivity and Virulence
The ability of a pathogen to establish infection
The ability of a pathogen to cause disease
Define infectious dose.
Number of bacteria needed to cause infection
Describe how vibrio cholerae causes disease.
It uses its flagella to propel itself into the mucosal membrane of the intestines.
It then begins producing toxins A and B, which bind to GM gangliosides and triggers production of cAMP
This leads to chloride efflux and hence movement of water into the lumen from the cells
State whether each of the following are Gram-positive or Gram-negative:
Shigella - negative
Streptococcus - positive
Listeria - positive
Clostridium - positive
Vibrio cholerae - negative
E. coli - negative
Salmonella - negative
Staphylococcus - positive
Neisseria - negative
Haemophilus influenzae - negative
Give two examples of Gram-negative opportunistic bacteria.