1. Group A ?-hemotytic streptococcal infection of the pharynx may be followed in some by:Rheumatic feverTyphoid feverSyphilisDiphtheriaQuestion 1 of 20 2. For uniform staining reaction, morphology & biochemical activity, it is advisable to study bacterial cultures during theDeath phaseLag phaseStationary phaseLogarithmic phaseQuestion 2 of 20 3. Bacteria with tuft of flagella at one end are calledBipolarPeritrichateMonotrichateLophotrichateQuestion 3 of 20 4. The first virological marker following acute hepatitis B infection isAnti Hbs AgHbsAgIgM Anti Hbc AgAnti Hbe AgQuestion 4 of 20 5. All of the following statements about Pathogenesis of clostridium difficile associated pseudomembranous enterocolitis are true, exceptToxin B is a CytotoxinExotoxin MediatedToxin A is more potent than Toxin BToxin A is an EnterotoxinQuestion 5 of 20 6. Aflatoxin is produced byMucor.Aspergillus.Tricophyton.Candida.Question 6 of 20 7. Each of the following represents a common opportunistic infection associated with HIV EXCEPT one Which one is this EXCEPTIONCandidiasisHairy leukoplakiaCryptosporidium enterocolitisAdenovirus conjunctivitisQuestion 7 of 20 8. Signs of typhoid fever is / areHaemorrhageOsteomyelitisAll of the abovePerforationQuestion 8 of 20 9. Nagglers reaction detects-HyaluronidaseNone of the aboveLecithinaseCoagulaseQuestion 9 of 20 10. Tuberculin test screens forCell mediated immunityPhagocyte dysfunctionComplement functionHumoral immunityQuestion 10 of 20 11. Non supparative lesion caused by group-A StreptococciNecrotizing fasciitisImpetigoPoststreptococcaL GlomerulonephritisCellulitisQuestion 11 of 20 12. In order for a virus to infect a host cell, it must first adsorb onto the cell surface, This process necessitatesan insertion of virally specified glycoproteins into the host-cell membranean inhibition of the cellular secretion of interferon -a specific binding of the virus to a cell-membrane receptor.Phagocytic activity by the cell.Question 12 of 20 13. Microorganisms of which of the following genera are most predominant in the normal oral floraStreptococcusLactobacillusBacillusStaphylococcusQuestion 13 of 20 14. Regarding IgE, which of the following is false?Causes anaphylaxisCross placentaImmediate reactionFix complementQuestion 14 of 20 15. Which of the following chemical agents has the broadest antimicrobial spectrum of activity?EthanolGlutaraldehydePhenolLsopropanolQuestion 15 of 20 16. All are true about viruses except:Enveloped virus are more susceptible to environmental conditionsThe nucleic acid is either RNA or DNAAre obligate intracellular parasitesDo not show latency between inoculation and diseaseQuestion 16 of 20 17. Commonest site of extra intestinal amoebiasis is:SpleenLungsBrainLiverQuestion 17 of 20 18. In poorly controlled Type I diabetes, most common infection is:MucormycosisRhinosporidiasisCryptococcusHistoplasmosisQuestion 18 of 20 19. Pneumococcus can be differentiated from streptococcus byGrowth characteristicsGram stainingType of hemolysisBile solubilityQuestion 19 of 20 20. Synthesis of an immunoglobulin in membrane bound or secretory form is determined by:Allelic exclusionClass switchingOne turn to two turn joining ruleDifferential RNA processingQuestion 20 of 20 Loading...