Micro - Class 6

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Last updated 12:18 PM on 5/6/26
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8 Terms

1
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Features of mycobacterium tuberculosis:

  1. Produces niacin

  2. Produces heat sensitive catalase

2
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Reservoir of M.TB?

Human lungs

3
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What stain is used specifically for detection of Mycobacterium?

Auramine-rhodamine stain

4
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Tuberculosis prevention?

  1. Immunoprophylaxis: administration of the attenuated strain derived from M.bovis strain

  2. Isoniazid: taken for 9 months, can prevent TB in person with infection but no clinical symptoms

5
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Features of corynebacterium diphtheriae?

  • Gram positive club shaped rods

  • V and L arrangement (Chinese characters)

  • Volutin granules on Loeffler medium

  • Aerobic bacteria

6
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Disease caused by corynebacterium diphtheriae?

Throat diphtheriae with dirty grey pseudomembrane

7
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Complications associated with disease caused by corynebacterium diphtheriae?

  • Myocarditis

  • Neuritis - paralysis

  • Kidney problems

  • Bleeding problems

8
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Diagnosis of Actinomycosis?

  • Gram staining of the granules

  • Anaerobic culture, selective media: with NaCl, horse blood, MTZ, nalidixic acid

  • Colonial morphology - ‘molar tooth’

  • ‘Sun ray’ appearance occurs on crushing bacilli which release the sulphur granules between slides