Microbiology MCQs

Page No. 7

Phospholipid used to investigate syphilis by the reagin test is________________?


aCardiolipin

✓


bPlasminogen

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cPalmityl lecithin

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dSerine

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View Answer Cardiolipin

In small intestine, cholera toxin acts by______________?


aADP – ribosylation of the G regulatory protein

✓


bInhibition of adenyl cyclase

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cActivation of GTPase

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dActive absorption of NaCI

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The most frequently encountered clostridial species in gas gangrene is______________?


aClostridium botulinum

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bClostridium welchii

✓


cClostridium tetani

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dClostridium difficile

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View Answer Clostridium welchii

Group A carbohydrate of Str. pyogenes cross reacts with human_________________?


aSynovial fluid

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bMyocardium

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cCardiac valves

✓


dVascular intima

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View Answer Cardiac valves

ASO (Antistreptolysin 0) test is uesd for the diagnosis of________________?


aRheumatoid arthritis

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bTyphoid fever

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cRheumatie fever

✓


dRickettsial fever

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View Answer Rheumatie fever

Following are the characteristics of Vincent’s angina EXCEPT_______________?


aUlcerative gingivostomatitis

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bCaused due to malnutrition

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cA symbiotic infection

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dCaused by leptospira interrogans

✓



Pathogenesis of diphtheria is attributed to__________________?


aInvasion

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bEndotoxin

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cExotoxin

✓


dCapsule

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View Answer Exotoxin

Leptospirosis, all are true except______________?


aFaeces & urine of rodents is the cause

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bOnset of IgM in 2 days

✓


cIncubation period is 10 days

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dIt is sensitive to penicillin

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All are true about widel test except________________________?


aBase lines differ depending on the endemicity of the disease

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bO antibodiest last longer and hence is not indicative of recent infection

✓


cH antigen cannot differentiate between subtypes

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dHigh titre value in a single widal test is not confirmative

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Lepromin test is useful for________________?


aDiagnosis

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b Prognosis

✓


cTreatment plan

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dEpidemiology

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View Answer Prognosis

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