1. Which of the following is characteristic infection' caused by Nocardia:Colonic diverticulosisSecondary dissemination to liverBrain abscessDiarrheaQuestion 1 of 20 2. Which of the following is MOST resistant to sterilizing conditions?Oral yeastHepatitis B virusBacterial endosporeMycobacterium tuberculosisQuestion 2 of 20 3. The binding site for complement on the IgG molecule is in theCL domainCH2 domainVL domainCHI domainQuestion 3 of 20 4. Aflatoxin is produced byCandida.Tricophyton.Mucor.Aspergillus.Question 4 of 20 5. T lymphocytes are MOST directly involved in which of the following?Complement synthesisContact dermatitisImmediate hypersensitivityImmune complex injuryQuestion 5 of 20 6. Which of the following statements related to cross-infection is not true?prions are resistant to conventional sterilization methodsDroplet nuclei less than 100 /lm in diameter are entrained in the air for many hoursviral infections are unlikely to spread during the prodromal stageblood, saliva are regarded as fomites with respect to infection transmissionQuestion 6 of 20 7. The chemotactic factor isC2aC3bC5aC4aQuestion 7 of 20 8. Sunlight has sterilizing effect because:It has short wavelengthIt has long wavelengthHeat is presentOzone is present in the environmentQuestion 8 of 20 9. Which type of infection listed below often causes leukocytosis?BacterialViralFungalParasiticQuestion 9 of 20 10. Under which of the following circumstances does a graft versus host reaction occur?When viable lymphoid cells are present in the graftWhen the recipient and the donor are SyngeneicWhen nonvital tissues are graftedWhen the graft is contaminated with gram- negative microorganismsQuestion 10 of 20 11. Which of the following bacteria is c-AMP positiveS. pyogenesStaph. AureusS. agalactaciaePneumococciQuestion 11 of 20 12. All are true regarding Bordetella Pertussis except:Nasopharyngeal swab is taken as a sample for diagnosisCauses whooping cough.Antibody immunoassay is diagnosticChildren and adults who are vaccinated can have disease later in lifeQuestion 12 of 20 13. The biologic consequences of complement activation include:Immune adherence and opsonisationAnaphylatoxin activityChemotaxis of phagocytesAll of the aboveQuestion 13 of 20 14. The mechanism by which most fungi cause diseaseCoagulase productionLecithinase productionHypersensitivityExotoxin productionQuestion 14 of 20 15. Vaccination is based on the principle of:Clonal detectionImmunologic MemoryAgglutinationPhagocytosisQuestion 15 of 20 16. A 10-year old child presented with severe sore throat and a grey psueudomembrane over pharynx and tonsils. The organism causing this infection is most likely -A catablase-positive gram positive coccus that grows in clustersA gram positive bacillusA gram negative bacillusA single-stranded positive sense RNA virusQuestion 16 of 20 17. Certain enzymes are responsible for suppuration, These enzymes derive chiefly fromlymphocytes.SerumTissue.Neutrophils.Question 17 of 20 18. Which of the following has been shown to be the most effective antimicrobial agent for reducing plaque and gingivitis long-term?Quaternary ammonium compoundsChlorhexidineStannous fluoridePhenolic compoundsQuestion 18 of 20 19. All of the following are true regarding chlamydia trachomatis except:Inside the cell it evades phagolysosomeReticulate body divides by binary fissionIt has a bipha'sic lifeElementary body is metabolically activeQuestion 19 of 20 20. Dimorphism in microorganisms is characterized by the capability to produceboth by budding and by production of spores.Both sexual and asexual spores.two distinct types of clinical infections.both a yeast phase and a mycelial phase.Question 20 of 20 Loading...
