MCBoM- Bacteria

Question 1

Streptococcus pneumoniae

Answer 1

From upper respiratory tract
Causes pneumonia, meningitis, eye infections
Triggered by translocation to normally sterile site

Question 2

Escherichia coli

Answer 2

From gut
Causes utis, septicaemia
Triggered by translocation to normally sterile site

Question 3

Candida albicans

Answer 3

From gut (some mouth and vagina)
Causes vaginosis, utis, oral candidosis, oesophageal candidosis, systemic infection
Triggered by pregnancy, menstruation, diabetes, antibacterials, age, dentures, immunocompromised

Question 4

Staphylococcus epidermidis

Answer 4

From skin
Causes prosthetic implant infections
Triggered by translocation to normally sterile site in presence of a substrate for biofilm formation

Question 5

alpha- haemolytic streptococci

Answer 5

From mouth
Causes endocarditis
Triggered by translocation to normally sterile site

Question 6

Staphylococcus Aureus

Answer 6

Nose and moist skin
Causes wound infections, eye infections, septicaemia, osteomyelitis, septic arthritis, pneumonia
Triggered by translocation to normally sterile site

Question 7

Streptococci pyogenes

Answer 7

Necrotising fasciitis

Question 8

Chlostridium spp.

Answer 8

Gas gangrene

Especially in IV drug users, necrosis leads to growth of anaerobic bacteria

Question 9

Chlostridium tetanic

Answer 9

Tetanus
Bacteria grow in dead anaerobic tissue, release tetanospasmin toxin
Toxin binds to nerve ending, inhibits neurotransmitter release, blocks inhibition impulses, muscle spasm