1. A five year old child presents with pustular lesions on the lower legs. The culture from the lesion showed hemolytic gram positive coccii. Provisional diagnosis of Group A streptococcal pyoderma can be done by:Catalase positivityBacitracin sensitivityOptochicin sensitivityBile solubilityQuestion 1 of 20 2. Antigen antibody precipitation is maximally seen in which of the followingAntigen Hapten interactionExcess of antigenEquivalence of antibody and antigenExcess of antibodyQuestion 2 of 20 3. Which of the following is not a feature of anaphylaxis?Delayed reactionPassive transfer by serumImmediate reactionNone of the aboveQuestion 3 of 20 4. Gram stained periorbital exudates in severe panophthalmitis with cellulitis in an elderly diabetic shows irregular branching aseptate and broad hyphae. Which of the following is the most likely diagnosis:Apophysomyces spPenci]liumCandidaAspergillusQuestion 4 of 20 5. Thumb print appearance in culture film smear is seenBrucella speciesBordetella pertussisCtostridiurn welchiiBacillus anthracisQuestion 5 of 20 6. Which of the following statements about Pneumococcus is false:Commonest cause of Otitis mediaCauses mild forms of meningitisRespiratory tract of carriers is most important source of infectionCapsule aids in virulenceQuestion 6 of 20 7. Malabsorption caused by A/E -Ascaris lumbricoidesGiardiaStrongyloidesCapillaria philipensisQuestion 7 of 20 8. Toxoids areantigenic and non-toxicnon-antigenic and non-toxicantigenic and toxicnon-antigenic and toxicQuestion 8 of 20 9. Adenosine deaminase deficiency is seen in the following:Chronic granulomatous diseaseSevere combined immuno deficiency syndromeCommon variable immuno deficiency syndromeNezelofs syndromeQuestion 9 of 20 10. What is sterilization?Destroying all organism except sporesKills all pathogenic organismDestroying all organism in a given environmentDeactivate the spores and only pathogenic organismQuestion 10 of 20 11. Exotoxins are:Protein compoundNoneLipoproteinLipid-polysaccharide complexQuestion 11 of 20 12. Bile esculine Agar is used for identification ofEnterococcus FaecalisStreptococci PyogenesPneumococcusStaphylococcus PyogenesQuestion 12 of 20 13. Which of the following represents the phenotypic expression of both alleles in a gene pairCodominanceLyonizationPenetranceHybridizationQuestion 13 of 20 14. All of the following are true about acute infection except:ELISA is useful in Hepatitis B infectionImmunofluorescence is useful in detecting influenza infectionSpecific IgM antibody occurs in acute infectionSpecific IgM indicates rubella immune statusQuestion 14 of 20 15. A child on administration of Penicillin developed fever, rashes, urticaria and swelling. It is due to:Delayed hypersensivityIg E mediated hypersensitivityIg G mediated hypersensitivityImmune complex cytotoxicityQuestion 15 of 20 16. In the management of leprosy, Lepromin test is most useful forDiagnosisPrognosisEpidemiological investigationsTreatmentQuestion 16 of 20 17. The component that sensitizes bacteria and virus to UV IrradiationNucleic acidInorganic saltsLipidsCarbohydratesQuestion 17 of 20 18. The process of gene transfer between bacterial cells that involves the uptake of naked DNA molecules is classified as which of the following?TransformationConjugationTranslocationTransductionQuestion 18 of 20 19. Which of the following is an acid-fast bacillusNeisseria gonorrhoeaTreponema pallidumMycobacterium bacilliALL of the aboveQuestion 19 of 20 20. Infective dose of Salmonella Typhi is:One bacillus108 to 1010 bacilli1 to 10 bacilli102 to 105 bacilliQuestion 20 of 20 Loading...