1. The mechanism by which most fungi cause diseaseLecithinase productionHypersensitivityExotoxin productionCoagulase productionQuestion 1 of 20 2. A person presents with pneumonia. His sputum was sent for culture. The bacterium obtained was gram positive cocci in chains and alpha haemolytic colonies on sheep agar. Which of the following will help in confirming the diagnosis -BacitracinOxacillinNovobioeinOptochinQuestion 2 of 20 3. The main advantage of active immunity is that resistance is:None of the aboveLong termAvailable immediatelyShort termQuestion 3 of 20 4. Not true about drug resistance mechanism?If plasmid mediated always transferred verticallyComplete removal of target is cause of resistance to vancomycinAlteration of target in pneumococcal resistanceMost common mechanism is production of neutralizing substancesQuestion 4 of 20 5. Group A streptococci is best diagnosed by -Catalase negativeBile solubilityOptochin sensitivityBacitracin sensitivityQuestion 5 of 20 6. Streptococcus mutans can be distinguished from other streptococci byFermentation of mannitol and sorbitolHemolysis on blood agarProduction of extracellular polysaccharidesOptochin sensitivityQuestion 6 of 20 7. Which of the following bacterial exotoxins converts plasminogen to plasmin?CoagulaseM-proteinPlasmalysinStreptokinaseQuestion 7 of 20 8. Characteristic feature of retiovirus is:RibonucleaseReverse transcriptaseDNA polymeraseRestriction endonucleaseQuestion 8 of 20 9. Botulinum affects all exceptPost ganglionic nervesPreganglionic junctionNeuromuscular junctionCNSQuestion 9 of 20 10. Leprosy bacilli are transmitted from person to person by all except From open soreDischarge from nasal mucosaThrough breast milkThrough intact skinQuestion 10 of 20 11. The chemotactic factor isC3bC4aC2aC5aQuestion 11 of 20 12. For uniform staining reaction, morphology & biochemical activity, it is advisable to study bacterial cultures during theLogarithmic phaseDeath phaseStationary phaseLag phaseQuestion 12 of 20 13. Ovalbumin was injected into a Rabbit. Which of the following classes of Antibiotics are likely to be produced initially:IgDIgEIgGIgMQuestion 13 of 20 14. All of the following are true regarding chlamydia trachomatis except:Elementary body is metabolically activeReticulate body divides by binary fissionInside the cell it evades phagolysosomeIt has a bipha'sic lifeQuestion 14 of 20 15. Staphylococci typically occurs inChainsIrregular ClustersPairsTetradsQuestion 15 of 20 16. Post streptococcal acute glomerulus nephritis is an example forType IV hypersensitivityType III hypersensitivityType I hypersensitivityType II hypersensitivityQuestion 16 of 20 17. prion - true iscontains DNA/RNAsensitive to most chemical sterilizationevokes strong immunologic reactionhave long incubation periodQuestion 17 of 20 18. The classic opportunistic infection in acquired immune deficiency syndrome is:TuberculosisPneumocystis carinii pneumoniaHerpetic gingivostomatitisApthous stomatitisQuestion 18 of 20 19. The single most important laboratory test for determining the virulence of staphylococci isMannitol fermentationHemolysis of sheep erythrocytesThe catalase testDetection of coagulaseQuestion 19 of 20 20. Malignant pustule is seen in -CarbuncleInfected rodent ulcerCutaneous anthraxUlcerating melanomaQuestion 20 of 20 Loading...