/44 471 Oral Microbiology Preparation (Dr. Hem Sopheak) 1 / 44 1) Among 4 phases of biofilm formation, the phase that is done immediately about 4 hours is:? a. Phase 1 b. Phase 4 c. Phase 3 d. Phase 2 2 / 44 2) A bacterium from buccal mucosa that can cause lung infection in chronic obstructive pulmonary infections in cystic fibrosis patients is:? a. Pseudomonas aeruginosa b. Mycobacterium tuberculosis c. Klebsiella pneumoniae d. Streptococcus pneumoniae 3 / 44 3) Major bacteria cause aggressive periodontitis? a. Prevotella intermedia, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae b. Eikenella corrodens, Capnocytophaga sputigena, Actinobaccilus actinomycetemcomitans, Prevotella intermedia c. Capnocytophaga sputigena, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae d. Actinobaccilus actinomycetemcomitans, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae 4 / 44 4) Principal Cocci Gram negative bacteria found in oral cavity:? a. Gemella b. Enterococcus c. Veillonella d. Streptococcus 5 / 44 5) Analytical techniques for monitoring biofilms by βDirect detectionβ π a. Gas Chromatography – Mass Spectrometry (GC-MS) b. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) c. High Pressure Liquid Chromatography (HPLC) d. Microscopy techniques 6 / 44 6) Bacteria usually cause Necrotizing Ulcerative Gingivitis? a. Fusiform bacillus and Capnocytophaga sputigena b. Borrelia vincentii and Porphyromonas endodontalis c. Fusiform bacillus and Borrelia vincentii d. Borrelia vincentii and Eikenella corrodens 7 / 44 7) The most common bacterium that is responsible for tonsillitis and pharyngitis is:? a. Group-B beta hemolytic Streptococcus ( Streptococcus agalactiae) b. Streptococcus mitis c. Group-A beta hemolytic Streptococcus ( Streptococcus pyogenses) d. Streptococcus mutans 8 / 44 8) Factor that does not influence to dental caries? a. Individual factor b. Duration and frequency of exposure c. Size and form of teeth d. Substrate for microorganisms 9 / 44 9) Major bacteria cause chronic periodontitis:? a. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, E.coli b. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae,Stphylococcus aureus c. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Streptococcus anginosus d. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Pseudomonas aeruginosa 10 / 44 10) Bacteria usually cause Pericoronitis? a. Fusiform bacillus, Eikenella corrodens, Alpha-hemolytic Streptococci and Capnocytophaga sputigena b. Fusiform bacillus , Provetella, Eikenella corrodens and Capnocytophaga sputigen c. Borrelia vincentii, Bacterioides, Provetella and Eikenella corrodens d. Alpha-hemolytic Streptococci, Provetella, Bacterioides and Capnocytophaga 11 / 44 11) Biofilm infection is usually found in sites of primary and secondary infection except:? a. Subvenous catheter b. Mouth c. Genital infection d. Artificial hip implant 12 / 44 12) Steps in order to perform bacteriological diagnostic of oral microbiology:? a. Direct examination , Gram stain, Antimicrobial Susceptibility testing, Culture , Identification , b. Direct examination , Gram stain, Culture , Identification , Antimicrobial Susceptibility testing c. Identification , Direct examination , Gram stain, Culture , Antimicrobial Susceptibility testing d. Antimicrobial Susceptibility testing, Direct examination , Gram stain, Culture , Identification , 13 / 44 13) Infection in oral cavity by oral flora, which proposition is inexact? a. Changes in exposure to antiseptic b. Changes in salivary flow c. Changes in the immune system d. Administration of antibiotics 14 / 44 14) Major bacteria usually cause dental caries:? a. Mutans Streptococci, Lactobacilli, Actinomyces vicosus b. Mutans Streptococci, Lactobacilli, Clostridium c. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus d. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus 15 / 44 15) Antibiotic which is common use to treat anaerobic bacteria π a. Colistin b. Vancomycin c. Gentamicin d. Metronidazole 16 / 44 16) Among 4 phases of biofilm formation, the phase that is done the longest, about 7-14 days is:? a. Phase 4 b. Phase 3 c. Phase 2 d. Phase 1 17 / 44 17) A bacterium that never found in tooth surface:? a. Streptococcus anginosus b. Streptococcus mutans c. Streptococcus pneumoniae d. Streptococcus mitis 18 / 44 18) Major bacteria cause periodontitis π a. Fusobacterium nucleatum, E.coli, Streptococci, Borrela vincenti b. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Borrela vincenti c. Fusobacterium nucleatum, Petostreptococcus micros, Enterococcus, Borrela vincenti d. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Pneumococcus 19 / 44 19) In dental caries, the protective factor is π a. Frequent eating / drinking of fermentable carbohydrates b. Antibacterials ( fluorides, Chlorhexidine, Xylitol) c. Acid producing bacteria d. Poor oral hygiene 20 / 44 20) Strategy to control of nutrients in oral biofilm:? a. Inhibition of key microbial enzyme b. Antimicrobial agents c. Stimulate base production d. Fluoride 21 / 44 21) Which bacteria that is not always presence in saliva:? a. Streptococcus mitis b. Streptococcus oralis c. Streptococcus agalactiae d. Streptococcus salivarius 22 / 44 22) Oral opportunistic infection happens when:? a. An organism that usually is nonpathogenic causes disease b. An organism that usually is nonpathogenic has no opportunity to cause disease c. An organism that usually is pathogenic becomes normal flora d. An organism that usually is pathogenic causes disease 23 / 44 23) Strategy to control of rendox potential in oral biofilm:? a. Stimulate base production b. Fluoride c. Inhibition of key microbial enzyme d. Oxygenating agents 24 / 44 24) Principal Rods Gram negative bacteria found in oral cavity:? a. Corynebacterium b. Porphyromonas c. Lactobacillus d. Eubacterium 25 / 44 25) The comment bacterium causes dental caries:? a. Mutans Streptococci b. E.coli c. Staphylococcus aureus d. Pseudomonas aeruginosa 26 / 44 26) A bacterium that spread from lung infection and cause oral lesions with clinical sign include fever, chills, fatigue and malaise, weight loss, and persistent cough π a. Mycobacterium tuberculosis b. Pseudomonas aeruginosa c. Klebsiella pneumoniae d. Streptococcus pneumoniae 27 / 44 27) Microorganisms in oral tissue can cause π a. Systemic infection b. Only local infection c. Local infection d. Both, local and systemic infection 28 / 44 28) Pathway in order of pathogenesis of oral infection:? a. Decrease tissue resistance and increase number of bacteria with virulence- Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Pus formation b. Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Pus formation- Decrease tissue resistance and increase number of bacteria with virulence c. Entry of bacteria into soft tissue wall or trauma to the orifice – Pus formation- Formation of infiltrate – Destruction of connective tissues – Decrease tissue resistance and increase number of bacteria with virulence d. Pus formation- Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Decrease tissue resistance and increase number of bacteria with virulence 29 / 44 29) In dental caries, the pathogenic factor is π a. Saliva flow and components b. Remineralization ( fluoride, Calcium, Phosphate) c. Good oral hygiene d. Acid producing bacteria 30 / 44 30) Infections of the mucosa are more usually associated with transient oral bacteria, which one is incorrect? a. Pseudomonas b. Staphylococcus c. Enterococcus d. Helicobacter 31 / 44 31) Principal Cocci Gram positive bacteria found in oral cavity:? a. Neisseria b. Veillonella c. Moraxella d. Peptostreptococcus 32 / 44 32) Principal Rods Gram positive bacteria found in oral cavity:? a. Eikenella b. Actinomyces c. Simonsiella d. Prevotella 33 / 44 33) Which bacteria that is not presence in buccal mucosa? a. Streptococcus mitis b. Streptococcus mutans c. Streptococcus anginosus d. Treponema palidum 34 / 44 34) Analytical techniques for monitoring biofilms by βIndirect detectionβ π a. Detection of DNA by molecular biology technique b. Detection of proteins by molecular biology technique c. High Pressure Liquid Chromatography (HPLC) d. Microscopy techniques 35 / 44 35) Diseases are always found in oral cavity, except π a. Syphilis b. Tuberculosis c. Gonococci d. Typhoid fever 36 / 44 36) On tooth surface, bacteria that participate actively in adhesion of primary colonizers? a. Enterococcus stains b. Staphylococcus stains c. Streptococcus stains d. Pseudomonas stains 37 / 44 37) A major bacteria that is responsible in facilitating adhesion by other bacteria is:? a. Fusobacterium nucleatum b. Enterococcus stains c. Staphylococcus stains d. Streptococcus strains 38 / 44 38) A bacterium that is usually found in tongue π a. Streptococcus pneumoniae b. Clostridium difficile c. Staphylococcus epidemidis d. Streptococcus mitis 39 / 44 39) Steps in order for biofilm formation:? a. Coadhesion , adhesion, colonization, maturation and detachment b. Adhesion, colonization, coadhesion , maturation and detachment c. Colonization , adhesion, coadhesion , maturation and detachment d. Maturation and detachment, adhesion, colonization, coadhesion 40 / 44 40) Dental caries, which answer is incorrect? a. Increased of the organic substance of the tooth b. Calcified tissues of the teeth c. Characterized by demineralization of the inorganic portion d. Multifunctional microbial disease 41 / 44 41) The most common bacteria that are always presence in mouth as a normal flora, which proposition is inexact? a. B. Actinomyces b. C. Prevotella c. A. Streptococcus d. D. Gonococcus 42 / 44 42) Specificity of Anaerobic bacteria, except:? a. Incubation culture in 1-2 days b. Foul odor when opening anaerobic jar or bag c. Black pigmentation on culture d. Grow on anaerobic media culture 43 / 44 43) Strategy to control of biofilm pH in oral biofilm:? a. Fluoride b. Inhibition of key microbial enzyme c. Antiflammatory agents d. Generating nutrients 44 / 44 44) Antimicrobial against Porphyromonas gingivalis is π a. Vancomycin b. Kanamycin c. Erythromycin d. Metronidazole Your score isThe average score is 84% Facebook 0% Restart quiz Any comments? Send feedback
