Week 6: Lower Respiratory Tract Infections (LRTI) Flashcards
Acceptable or Unacceptable sample?
acceptable - WBC > SEC
Acceptable or Unacceptable sample?
Unacceptable - SEC > 10
ID
Streptococcus pneumoniae - GP diplococci
S. pneumoniae blood agar
alpha-hemolytic
S. pnuemoniae biochemical tests - catalase, optochin, and bile solubility
catalase - negative
optochin - sensitive
bile solubility - positive
ID
Moraxella catarrhalis - GN diplococci
ID
Moraxella catarrhalis - hockey puck colonies make it push test positive
ID
Haemophilus influenzae - GN pleomorphic bacilli
What is the growth pattern for H. influenzae?
Only grows on chocolate agar
what factors does H. influenzae require?
V (NAD) and X (hemin)
what factor does H. parainfluenzae require?
V only - growth on V, and V and X
ID
H. influenzae - only growth on V and X
ID
H. parainfluenzae - growth on all that contain V
ID
lactose fermenters versus non-lactose fermenters
ID
oxidase positive and negative
ID
left - glucose fermenters (Enterobacterales)
right - glucose oxidation (Pseudomonas aeroginosa)
ID
pyocyanin positive - Pseudomonas aeroginosa
ID
Legionella species - only grows on BCYE
ID
acid fast bacteria (AFB) - Mycobacterium tuberculosis
