Bacterial Infections

Which is the most common type of HAI?

Respiratory

What does Opportunistic mean?

Caused by organisms that don’t normally cause disease

Why is Streptococcus spilt into Group A and B?

Depends how they react in Agar coat

What type of infections does GAS cause?

Throat and Skin infections

What type of infections does IGAS cause?

Toxic shock syndrome and necrotizing fasciitis

What type of infections do GBS cause?

Gut, Urinary tract, Vagina, UTI, bloodstream, pneumonia, soft tissue, bone, joint

Where do you see Group C, F and G Streptococci?

Animals

GBS Example?

Streptococcus agalactiae

GAS Example

Streptococcus pyogenes

GIT site of infection?

Usually initiated and confined to gut but some can spread systemically

*How many strains of Escherichia coli can cause disease in the gut?*

200

What two types of E.coli are there?

Enterohaemorrhagic, Enterotoxigenic

What are the two types of Salmonella ?

*Salmonella Enteritidis, Salmonella Typhimurium*

What two types of *enterica* Typhimurium causes Typhoid fever?

*enterica* serovar Typhi, *enterica* serovar Paratyphi

What type of bacteria is overgrowth by Clostridium difficile

Obligate anaerobic spore-forming bacteria, resistant to many antibiotics

What can C.diff lead to?

Produces toxins that lead to severe bloody diarrhoea, pseudomembranous colitis and toxic megacolon