Microbiology MCQs

Page No. 7

Phospholipid used to investigate syphilis by the reagin test is________________?


aCardiolipin


bPlasminogen


cPalmityl lecithin


dSerine


View Answer Cardiolipin

In small intestine, cholera toxin acts by______________?


aADP – ribosylation of the G regulatory protein


bInhibition of adenyl cyclase


cActivation of GTPase


dActive absorption of NaCI



The most frequently encountered clostridial species in gas gangrene is______________?


aClostridium botulinum


bClostridium welchii


cClostridium tetani


dClostridium difficile


View Answer Clostridium welchii

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


aSynovial fluid


bMyocardium


cCardiac valves


dVascular intima


View Answer Cardiac valves

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


aRheumatoid arthritis


bTyphoid fever


cRheumatie fever


dRickettsial fever


View Answer Rheumatie fever

Following are the characteristics of Vincent’s angina EXCEPT_______________?


aUlcerative gingivostomatitis


bCaused due to malnutrition


cA symbiotic infection


dCaused by leptospira interrogans



Pathogenesis of diphtheria is attributed to__________________?


aInvasion


bEndotoxin


cExotoxin


dCapsule


View Answer Exotoxin

Leptospirosis, all are true except______________?


aFaeces & urine of rodents is the cause


bOnset of IgM in 2 days


cIncubation period is 10 days


dIt is sensitive to penicillin



All are true about widel test except________________________?


aBase lines differ depending on the endemicity of the disease


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


cH antigen cannot differentiate between subtypes


dHigh titre value in a single widal test is not confirmative



Lepromin test is useful for________________?


aDiagnosis


b Prognosis


cTreatment plan


dEpidemiology


View Answer Prognosis

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