Microbiology Flashcards
Where is S.Aureus found?
The nose (30-50%), a primary pathogen
What does S. Aureus case
BOSS EMPU
Bacteraemia Osteomyelitis Septicaemia Septic Arthritis Endocarditis Meningitis Pneumonia UTIs
Where is S. Epidermis found and what does it cause?
Skin, an opportunistic pathogen
Coagulase -ve staph
Foreign body infection
What is S. Pyogenes and what does it cause?
GAS
Bacterial Sore Throat
Scarlet Fever, Pneumonia, Puerperal Sepsis, Nec Fasc, Glomerularnephritis
What is S. Pneumoniae?
Causes: bacterial pneumonia and meningitis but not in neonates as well as OTITIS MEDIA
S. Agalactinae?
GBS - commonest cause of bacterial pneumonia and sepsis in neonates
S. Milleri Complex?
Pus forming strep
Abscesses - lung, brain, liver, teeth
Viridian’s Strep?
Alpha haemolytic strep > URT
Sub-acute endocarditis
Strep gallolyticus
Step bovis
Alpha haemolytic strep > bowel flora
Colonic malignancies
Listeria mongocytogenes
Gram +ve bacillus
Rare - sepsis/meningitis in pregnancy, neonates, immunosuppressed px
Unpasteurised milk cheese
Corynebacterium species
Gram +ve bacilli
Skin and URT
Devices and trauma
Diphtheria
Propionibacterium acnes
Gram +ve bacilli
Acne
Device associated and post procedural infections
Enterobacteriaceae
Gram -ve bacilli in bowel flora including E.coli, K. pneumonia and enterobacter cloacae
E.coli
UTI
Bacteraemia
Nosocomial infection e.g. line, pneumonia, wound
Toxigenic strains eg 0157 = severe diarrhoea and haemolytic uraemia syndrome (HUS)
Pseudomanas aeruginose
Multi-resistance gram -ve bacillus
opportunistic
Resp infections, UTIS, soft tissue and others
GREEN PIGMENT
N. meningitidis
Gram -ve diplococcus
Meningococcal sepsis and/or meningitiss
Purpuris non-blanching rash - sepsis
N. gonorrhoea
Gram -ve diplococcus
Gonorrhoea
Opthlamia neonatorum
Can cause septic arthritis
H. influenze
Gram -ve bacillus
Normal resp tract flora
Rest tract infection eg pneumonie/COPD exacerbations
Capsulated types (b) > meningitis/epiglottitis - CAN BE PREVENTED WITH VACCINE
Anaerobes
Clostridium
C.DIFF - antibiotic associated diarrhoea/colitis
C.perfringens - gas gangrene
C.tetani - tetanus
C. botulinum - botulism
Bacterial species, fusobacterium, prevotella
Part of polybac infections e.g. dental, lung absences, colonic absences,
Mycobacterium
ACID FAST BACILLI (AFB)
Don’t stain
Tuberculosis
Others = atypical mycobacteria > rest infections in people with chronic lung disease/ opportunistic infections in immune-compromised px e.g. AIDS, transplant px etc
What is the most common cause of RTI/
Mycobacterium. Pneumonia
What causes syphilis?
Treponema (Spirochaetes)
What an spirochetes cause?
Leptospirosis
Lyme Disease
