/44 0 Oral Microbiology Preparation (Dr. Hem Sopheak) 1 / 44 1) Principal Rods Gram negative bacteria found in oral cavity:? a. Porphyromonas b. Lactobacillus c. Eubacterium d. Corynebacterium 2 / 44 2) In dental caries, the pathogenic factor is π a. Acid producing bacteria b. Saliva flow and components c. Remineralization ( fluoride, Calcium, Phosphate) d. Good oral hygiene 3 / 44 3) Strategy to control of nutrients in oral biofilm:? a. Inhibition of key microbial enzyme b. Fluoride c. Antimicrobial agents d. Stimulate base production 4 / 44 4) Steps in order for biofilm formation:? a. Coadhesion , adhesion, colonization, maturation and detachment b. Colonization , adhesion, coadhesion , maturation and detachment c. Maturation and detachment, adhesion, colonization, coadhesion d. Adhesion, colonization, coadhesion , maturation and detachment 5 / 44 5) Diseases are always found in oral cavity, except π a. Typhoid fever b. Tuberculosis c. Gonococci d. Syphilis 6 / 44 6) Infections of the mucosa are more usually associated with transient oral bacteria, which one is incorrect? a. Enterococcus b. Pseudomonas c. Helicobacter d. Staphylococcus 7 / 44 7) Specificity of Anaerobic bacteria, except:? a. Grow on anaerobic media culture b. Black pigmentation on culture c. Foul odor when opening anaerobic jar or bag d. Incubation culture in 1-2 days 8 / 44 8) Major bacteria cause periodontitis π a. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Borrela vincenti b. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Pneumococcus c. Fusobacterium nucleatum, E.coli, Streptococci, Borrela vincenti d. Fusobacterium nucleatum, Petostreptococcus micros, Enterococcus, Borrela vincenti 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) Strategy to control of rendox potential in oral biofilm:? a. Fluoride b. Inhibition of key microbial enzyme c. Stimulate base production d. Oxygenating agents 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) The comment bacterium causes dental caries:? a. Staphylococcus aureus b. Mutans Streptococci c. Pseudomonas aeruginosa d. E.coli 13 / 44 13) Principal Rods Gram positive bacteria found in oral cavity:? a. Eikenella b. Prevotella c. Actinomyces d. Simonsiella 14 / 44 14) Major bacteria cause aggressive periodontitis? a. Eikenella corrodens, Capnocytophaga sputigena, Actinobaccilus actinomycetemcomitans, Prevotella intermedia b. Prevotella intermedia, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae c. Actinobaccilus actinomycetemcomitans, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae d. Capnocytophaga sputigena, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae 15 / 44 15) 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 16 / 44 16) Microorganisms in oral tissue can cause π a. Local infection b. Systemic infection c. Only local infection d. Both, local and systemic infection 17 / 44 17) The most common bacterium that is responsible for tonsillitis and pharyngitis is:? a. Group-A beta hemolytic Streptococcus ( Streptococcus pyogenses) b. Group-B beta hemolytic Streptococcus ( Streptococcus agalactiae) c. Streptococcus mitis d. Streptococcus mutans 18 / 44 18) Principal Cocci Gram positive bacteria found in oral cavity:? a. Peptostreptococcus b. Moraxella c. Neisseria d. Veillonella 19 / 44 19) Principal Cocci Gram negative bacteria found in oral cavity:? a. Enterococcus b. Streptococcus c. Gemella d. Veillonella 20 / 44 20) Among 4 phases of biofilm formation, the phase that is done the longest, about 7-14 days is:? a. Phase 1 b. Phase 3 c. Phase 4 d. Phase 2 21 / 44 21) Dental caries, which answer is incorrect? a. Calcified tissues of the teeth b. Multifunctional microbial disease c. Increased of the organic substance of the tooth d. Characterized by demineralization of the inorganic portion 22 / 44 22) A major bacteria that is responsible in facilitating adhesion by other bacteria is:? a. Streptococcus strains b. Fusobacterium nucleatum c. Staphylococcus stains d. Enterococcus stains 23 / 44 23) 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. Microscopy techniques d. High Pressure Liquid Chromatography (HPLC) 24 / 44 24) A bacterium from buccal mucosa that can cause lung infection in chronic obstructive pulmonary infections in cystic fibrosis patients is:? a. Mycobacterium tuberculosis b. Streptococcus pneumoniae c. Klebsiella pneumoniae d. Pseudomonas aeruginosa 25 / 44 25) Strategy to control of biofilm pH in oral biofilm:? a. Fluoride b. Antiflammatory agents c. Inhibition of key microbial enzyme d. Generating nutrients 26 / 44 26) Factor that does not influence to dental caries? a. Size and form of teeth b. Duration and frequency of exposure c. Individual factor d. Substrate for microorganisms 27 / 44 27) Analytical techniques for monitoring biofilms by βIndirect detectionβ π a. High Pressure Liquid Chromatography (HPLC) b. Microscopy techniques c. Detection of proteins by molecular biology technique d. Detection of DNA by molecular biology technique 28 / 44 28) Infection in oral cavity by oral flora, which proposition is inexact? a. Changes in salivary flow b. Administration of antibiotics c. Changes in exposure to antiseptic d. Changes in the immune system 29 / 44 29) A bacterium that is usually found in tongue π a. Streptococcus mitis b. Staphylococcus epidemidis c. Clostridium difficile d. Streptococcus pneumoniae 30 / 44 30) Antimicrobial against Porphyromonas gingivalis is π a. Kanamycin b. Metronidazole c. Erythromycin d. Vancomycin 31 / 44 31) A bacterium that never found in tooth surface:? a. Streptococcus pneumoniae b. Streptococcus anginosus c. Streptococcus mutans d. Streptococcus mitis 32 / 44 32) On tooth surface, bacteria that participate actively in adhesion of primary colonizers? a. Enterococcus stains b. Streptococcus stains c. Pseudomonas stains d. Staphylococcus stains 33 / 44 33) Steps in order to perform bacteriological diagnostic of oral microbiology:? a. Direct examination , Gram stain, Antimicrobial Susceptibility testing, Culture , Identification , b. Antimicrobial Susceptibility testing, Direct examination , Gram stain, Culture , Identification , c. Direct examination , Gram stain, Culture , Identification , Antimicrobial Susceptibility testing d. Identification , Direct examination , Gram stain, Culture , Antimicrobial Susceptibility testing 34 / 44 34) In dental caries, the protective factor is π a. Poor oral hygiene b. Acid producing bacteria c. Antibacterials ( fluorides, Chlorhexidine, Xylitol) d. Frequent eating / drinking of fermentable carbohydrates 35 / 44 35) 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 36 / 44 36) Bacteria usually cause Necrotizing Ulcerative Gingivitis? a. Fusiform bacillus and Capnocytophaga sputigena b. Borrelia vincentii and Porphyromonas endodontalis c. Borrelia vincentii and Eikenella corrodens d. Fusiform bacillus and Borrelia vincentii 37 / 44 37) Bacteria usually cause Pericoronitis? a. Alpha-hemolytic Streptococci, Provetella, Bacterioides and Capnocytophaga b. Fusiform bacillus, Eikenella corrodens, Alpha-hemolytic Streptococci and Capnocytophaga sputigena c. Borrelia vincentii, Bacterioides, Provetella and Eikenella corrodens d. Fusiform bacillus , Provetella, Eikenella corrodens and Capnocytophaga sputigen 38 / 44 38) The most common bacteria that are always presence in mouth as a normal flora, which proposition is inexact? a. A. Streptococcus b. D. Gonococcus c. C. Prevotella d. B. Actinomyces 39 / 44 39) Antibiotic which is common use to treat anaerobic bacteria π a. Colistin b. Vancomycin c. Gentamicin d. Metronidazole 40 / 44 40) Which bacteria that is not presence in buccal mucosa? a. Streptococcus anginosus b. Streptococcus mutans c. Treponema palidum d. Streptococcus mitis 41 / 44 41) 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. Klebsiella pneumoniae b. Streptococcus pneumoniae c. Pseudomonas aeruginosa d. Mycobacterium tuberculosis 42 / 44 42) Among 4 phases of biofilm formation, the phase that is done immediately about 4 hours is:? a. Phase 1 b. Phase 2 c. Phase 3 d. Phase 4 43 / 44 43) Which bacteria that is not always presence in saliva:? a. Streptococcus salivarius b. Streptococcus oralis c. Streptococcus mitis d. Streptococcus agalactiae 44 / 44 44) Major bacteria usually cause dental caries:? a. Mutans Streptococci, Lactobacilli, Clostridium b. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus c. Mutans Streptococci, Lactobacilli, Actinomyces vicosus d. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus Your score isThe average score is 0% Facebook 0% Restart quiz Any comments? 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