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15 Cards in this Set
- Front
- Back
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What is the nutritional supply in the haemophilus quad plate?
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Heart infusion agar (HI)
-pancreatic digest of casein |
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What happens in the oxidase test?
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1. Bacterial cytoC oxidizes the oxidase reagent
2. Cytochrome oxidase reoxidizes bacterial cytoC 3. Repeated cycles make purple |
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What gram neg rods are oxidase pos?
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-Pseudomonas
-Haemophilus |
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On what quadrants do you see
-H. influenzae growth -H. parainfluenzae growth |
H. flu = 3 and 4 only
H. paraflu = 2,3,4 |
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H. flu causes:
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-Meningitis in 3mo-3yr olds
-Lower Resp tract infections -cellulitis |
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H. aegyptius causes:
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conjunctivitis
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H. ducreyi causes:
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chancroid
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What happens to protein and glucose in the CSF during bacterial meningitis?
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Protein - goes up
Glucose - goes down |
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Most common cause of bacterial meningitis in a 3 yr old?
#2? #3? |
1. Hib
2. Strep pneumo 3. N. meningitidis |
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What is a nonculture method of detecting bacterial agents in meningitis?
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Antigen detection tests
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What do Ag detection tests detect?
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Capsular polysaccharide determinants
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What is the antigen in Hib that causes agglutination?
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PRP - polyribosylphosphate.
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When is antigen detection indicated?
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1. When antibiotics were given before CSF was obtained
2. To differentiate between Strep pneumo and Strep grp B in neonates |
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Major immune mechanism against encapsulated bacteria?
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Humoral
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Why kids betwen 3mo and 3 yrs are susceptible to hib?
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Immunodeficient
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