1. Phase contrast microscopy is based on principle of Different reflective indices of object Light scattering Different refractive indices of object Light attenuation 2. False about Staphylococcus lugdunensis Skin commensal Susceptible to antimicrobial Does not produce coagulase Causes infection of native valve 3. Most resistant to antiseptics Bacteria Viruses Spores Prions 4. Acute otitis media in children is most commonly due to: Staphylococcus aureus H. Influenza Steptococcus pneumonia M. Catarrhalis 5. H. pylori infection is seen in all except: Duodenal ulcer Gastric carcinoma Gastric lymphoma Fundal gastritis 6. The type of immunoglobulin most commonly increased in multiple myeloma is IgD IgA IgM IgG 7. Germ tubes are formed mainly by Candida stellatoidea Candida pseudotropicalis Candida albicans Candida tropicalis 8. All are true about Leptospirosis except: Penicillin G is drug of choice Latent period is 10 days Urine and faeces are main mode of transmission IgM is formed in 5 days 9. Bacteria with potent exotoxin is Klebsiella Shigella lostridium tetani Pseudomonas 10. Endoscopes are sterilized by using: Cidex Gamma radiation Autoclaving Boiling 11. Mycotic abscesles are due to: Bacterial Infection Fungal infection. Viral infection. Mixed infection 12. Loss of capsule in bacteria is generally associated with Decrease in virulence Increase in invasiveness Loss of Infectivity Inability to spread through tissue 13. Opsonization is done by: Interferon LTB4 Platelets C3b 14. Which of the following is anaerobic: Pseudomonas Klebsiella E.coli Bacteroides 15. The earliest identifiable cells of T-Cell Lineage during maturation are CD8+ Pro-T-Colls CD7 + Pro-T-Cells CD4+ Pre-T-Cells CD8+ Pre-T-Cells 16. New method of sterilizing heat sensitive equipment: Ionizing radiation UV radiation Non-ionizing radiation Plasma sterilization 17. Resistance of Staphylococcus aureus is due to: Pteomorphism Penicillin analogue production Elaboration of an enzyme that destroy penicillin Lack of nucleic acid in the cell wall 18. All of the following are true about acute infection except: ELISA is useful in Hepatitis B infection Immunofluorescence is useful in detecting influenza infection Specific IgM indicates rubella immune status Specific IgM antibody occurs in acute infection 19. The component that sensitizes bacteria and virus to UV Irradiation Inorganic salts Lipids Carbohydrates Nucleic acid 20. Pentameric structure: IgG IgD IgA IgM Loading … Question 1 of 20