1. Hay fever and allergies to certain foods are examples of:Cell-mediated or delayed hypersensitivity reactionsImmune complex-mediated hypersensitivity reactionsAtopic allergiesAntibody-dependent cytotoxic hypersensitivity reactionsQuestion 1 of 20 2. Which of the following chemical agents has the broadest antimicrobial spectrum of activity?EthanolPhenolLsopropanolGlutaraldehydeQuestion 2 of 20 3. Phage conversion is required for:DiphtheriaTularemiaGonorrhoeaAll of the aboveQuestion 3 of 20 4. A former from the sub-Himalayan region presents with multiple leg ulcers. The most likely causative agent is:C]adosporium speciesTrichophyton RubrumAspergillusSporothrix SchenkiiQuestion 4 of 20 5. In plasma sterilization control used isC. tetaniBacillus stearothermophilusBacillus subtilisC. PerfringesQuestion 5 of 20 6. Blood spills in hospital are disinfected withAbsolute alcoholCetavlonSodium hypochloriteQuarternary ammonium compoundsQuestion 6 of 20 7. Aflatoxins are produced byAspergillus.flavusAspergillus nigerCandidaAspergillus fumigatusQuestion 7 of 20 8. Most common organism associated with reactive arthritis:StaphylococcusShigellaChlamydiaYerseniaQuestion 8 of 20 9. True about Bacteroides is allThey are bile resistant anaerobesB. fragilis is most virulentSusceptible to most of the antibioticsPresent mainly in mixed infectionQuestion 9 of 20 10. All of the following statements about carbohydrate antigens are true, exceptGood memory responsePolyclonal responseT cell independent immunityPoor immunogenicityQuestion 10 of 20 11. Optimal time and temperature required for sterilization in an autoclave is121 degree centigrade for 20 mts, 15 lbs121 degree centigrade for 15 mts, 15 lbs121 degree centigrade for 15 mts, 5 lbs133 degree centigrade for 15 mts, 15 lbsQuestion 11 of 20 12. Which of the following statements regarding Legionella pneumonia is trueLegionnaires disease is also known as Pontiac feverAspiration is an important mode of transmissionHigh Person to Person transmissionLegionella antigens in the urine is the gold standard of diagnosisQuestion 12 of 20 13. Gram positive cocci which produce greenish colonies when cultured on blood agar, is bile insoluble and does not produce lesions when inoculated intra peritonially in mice, is:Streptococcus mitisStreptococcus pyogenesPneumococciStaphylococci aureusQuestion 13 of 20 14. Exotoxins are:Lipid-polysaccharide complexNoneLipoproteinProtein compoundQuestion 14 of 20 15. Commonest site of extra intestinal amoebiasis is:LiverSpleenLungsBrainQuestion 15 of 20 16. Killer and Helper cells are part of:B cellsT cellsMonocytesMacrophageQuestion 16 of 20 17. Filters used in biological safety cabinets:Seitz filterMillipore filterBerkfield filterHigh efficiency particulate (HEPA) filterQuestion 17 of 20 18. Characteristic of bacilus cereus food poisoning is -Absence of DiarrhoeaPresence of Pain in abdomenAbsence of vomitingPresence of feverQuestion 18 of 20 19. The single most important laboratory test for determining the virulence of staphylococci isDetection of coagulaseMannitol fermentationHemolysis of sheep erythrocytesThe catalase testQuestion 19 of 20 20. Certain enzymes are responsible for suppuration, These enzymes derive chiefly fromTissue.SerumNeutrophils.lymphocytes.Question 20 of 20 Loading...