1. Pentameric structure: IgD IgA IgM IgG 2. All of the following statements about staphylococcus aureus are true except bout 30% of general population is healthy nasal carriers Most common source of infection is cross infection from infected people Methicillin resistance is chromosomally mediated Epidermolysin and TSS toxin are superantigen 3. A dark field microscope would.be useful in examining blood for Streptococcus Treponema Actinomyces Mycobacterium 4. The type of immunoglobulin most commonly increased in multiple myeloma is IgD IgA IgG IgM 5. Regarding leptospirosis all are true except: Humans are the end hosts Lice act as reservoirs of disease It is a zoonosis Humans are accidental hosts of the disease 6. The anaphylaxis should be treated first with Anti histamines Steroids Antibiotics Epinephrine 7. True about mycobacterium other than tubercular bacilli: Occurs in persons with normal immunity Causes disseminated infection Person to person transmission is seen Cause decreased efficacy of BCG due to cross immunity 8. Microorganisms of which of the following genera are most predominant in the normal oral flora Streptococcus Lactobacillus Bacillus Staphylococcus 9. Positive Shick’s test indicates that person is Carrier of diptheria Susceptible to diphtheria Immune to diphtheria hypersensitive to diphtheria 10. Viruses can be isolated from clinical samples by cultivation in the following except Animals. Chemically defined media. Embryonated eggs. Tissue culture. 11. Which of the following is true about streptococcus pneumoniae: Gram -ve diplococcic Extracellular grain -ve diplococcic Gram +ve coccobacilli Gram +ve Lanceolate diplococci 12. Percentage of alcohol commonly used for optimum disinfection: 5-10% 60-80% 30-50% 10-20% 13. Nagglers reaction detects- Lecithinase Hyaluronidase None of the above Coagulase 14. Techoic acid is present in Cell wall of Gram negative organisms Cell wall of Gram positive organisms Cytoplasm of Gram positive organisms Cytoplasm of Gram negative organisms 15. First organism to appear in oral cavity: Streptococcus sanguis Lactobacilli Strept. Mutans Strept. Salivarious 16. Which of the following is anaerobic: Klebsiella Bacteroides Pseudomonas E.coli 17. Endoscopes are sterilized by using: Cidex Boiling Autoclaving Gamma radiation 18. Oral polio vaccine, all are true except Induces intestinal and humoral immunity Killed vaccine Residual neurovirulence is a problem Stored at subzero temp. 19. Zero growth rate is observed during one of the phases of the bacterial growth curve: Exponential growth Stationary phase Lag Decline 20. Candida albicans causes all of the following except Oral thrush Meningitis Mycetoma Endocarditis Loading … Question 1 of 20
