1. Graft versus host reaction is caused byMonocytesB-lymphocytesLeukocytesT-lymphocytesQuestion 1 of 20 2. Resistance of Staphylococcus aureus is due to:Penicillin analogue productionLack of nucleic acid in the cell wallElaboration of an enzyme that destroy penicillinPteomorphismQuestion 2 of 20 3. Germ tubes are formed mainly byCandida albicansCandida pseudotropicalisCandida stellatoideaCandida tropicalisQuestion 3 of 20 4. Sterilization means:Kills pathogenic organisms but not sporesKill spores and only pathogenic organismsKills all pathogensKills all organisms in a specific environmentQuestion 4 of 20 5. All are true about non typhoid salmonella except -Blood culture is more sensitive than stool culture in gastroenteritis in adultsCan cause invasive disease in neonatesResistance to Fluoroquinolone has emerged c,Poultry is sourceQuestion 5 of 20 6. Which term listed below is an interactive association between two populations of different species living together in which one population benefits from the association, while the other is not affected?MutualismSymbiosisLatencyCommensalismQuestion 6 of 20 7. The component that sensitizes bacteria and virus to UV IrradiationNucleic acidLipidsCarbohydratesInorganic saltsQuestion 7 of 20 8. Which of the following is a method for acquiring infection by Legionella pneumophilaConsumption of contaminated waterBreathing aerosols of environmental water sources such as air conditioning unitsClose contact with carrier of LegionellaConsumption of-contiminated meat and meat productsQuestion 8 of 20 9. All of the following statements concerning bacterial plaque are true, except:It is the key etiologic agent in the initiation of gingivitis and periodontal diseaseIt forms on a cleaned tooth within minutesIt is an accumulation of a mixed bacterial community in a dextran matrixIt is composed of solids (80%; 95% of which are bacteria) and water (20%)Question 9 of 20 10. Organ of locomotion in bacteria isFimbriaCapsuleCell wallFlagellaQuestion 10 of 20 11. A patient presents to the emergency department with history of persistant fever and cough. Radiological features are suggestive of pneumonia. Sputum examination cultures reveal aerobic branching grain positive filaments that are partially acid fast. Which of the following is the most likely etiological agent.Actinomyces IsraeliAspergillus fumigatusNocardia asteroidsStaphylococcus aureusQuestion 11 of 20 12. Which of the following is an acid-fast bacillusMycobacterium bacilliNeisseria gonorrhoeaTreponema pallidumALL of the aboveQuestion 12 of 20 13. Which of the following is true about staining?Calcoflour white stains acanthamoeba blackGram negative bacteria stain redHematoxylin and eosin stain DNA red or pinkGomarri's methenamine silver stains fungi greenQuestion 13 of 20 14. Hay fever and allergies to certain foods are examples of:Atopic allergiesAntibody-dependent cytotoxic hypersensitivity reactionsImmune complex-mediated hypersensitivity reactionsCell-mediated or delayed hypersensitivity reactionsQuestion 14 of 20 15. Which of the following is unique to gram-negative bacteria?RibosomesEndotoxinsFlagellaCapsulesQuestion 15 of 20 16. Antibiotic sensitivity and resistance of microorganisms is determined byDirect microscopyELISACultureDNA probeQuestion 16 of 20 17. Streptococcus all are true exceptStreptodornase cleaves DNAStreptolysis 0 is active in reduced statePyrogenic toxin A is plasmid mediatedStreptokinase is produced from serotype A,C,KQuestion 17 of 20 18. Which of the following statement is not true regarding Chlamydia Trachomatis:It is biphasicReticulate body divides by binary fissionElementary body is metabolically activeInside the cell it evades phagolysomeQuestion 18 of 20 19. True about mycobacterium other than tubercular bacilli:Causes disseminated infectionOccurs in persons with normal immunityCause decreased efficacy of BCG due to cross immunityPerson to person transmission is seenQuestion 19 of 20 20. Syphilis is caused byM. tuberculosisFungiSpirochetesSalmonellaQuestion 20 of 20 Loading...
