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16 Cards in this Set
- Front
- Back
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coliform
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capable of fermenting lactose to acid and gas
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step 1 water examination
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presumptive test - presence of coliforms
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step 2 water examination
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confirmed test - coliforms are fermenting
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step 3 water examination
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completed test - examine coliform colonies under microscope - brilliant green bile
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pasteurization
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63 degree water bath for 30 min
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boiling
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100 degree water for 10 min
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autoclave
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121 degree for 15 min
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disinfection
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process of killing, removing, or inhibition of pathogenic microorganisms
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examples of disinfectants
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phenol - lysol
alcohol - hand sanitizer chlorine - municipal water triclosan most destroy proteins and disrupt cell membrane function |
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nosocomial infections
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acquired during hospital stay
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penicillin and vancomysin
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inhibit transpeptidation, vancomysin
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antibiotics
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penicillin
vancomysin tetracycline erythromycin |
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two types of antibiotic tests
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disk diffusion
dilution test - minimal inhibitory concentration |
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test for oxygen reduction in poor and bad milk
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methylene blue
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yogurt decreases pH
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Lactobacillus bulgaricus
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koch's postulates
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1. microorganism must be present in every case of disease, absent in healthy
2. organism must be isolated and grown in culture 3. same disease must result when isolated organism introduced to healthy host 4. same organism must be isolated from diseased host |
