Oral Microbiology Test 0% 0 votes, 0 avg 0 You will have 60 minutes to complete all the questions. After the timer reaches 60 minutes, the exam will end and be saved automatically. Good luck! *Fingers crossed* The timer has been reached. The exam has now been terminated and saved. Oral Microbiology Test 1 / 60 The most common protozoa in the oral cavity of people ? a. Entamoeba histolytica b. Giardia lamblia. c. Giardia muris d. Trichomonas tenax 2 / 60 Which of the following statements on streptococci are not true? a. Some are Gram-positive and anaerobic b. Can cause caries in the absence of sucrose c. mutans group streptococci cause caries d. Can be primarily differentiated by their hemolytic reactions on blood agar 3 / 60 With regard to prevention of dental caries, which of the following statements are true? a. remineralization of early lesions can be accomplished by fluoridated toothpaste. b. substituting cariogenic artificial sweeteners c. probiotic therapy with βcariogenicβ bacteria is the most promising approach d. water fluoridation, though effective, leads to other major systemic illnesses 4 / 60 Caries, all are true except:? a. Fluorides help in reducing caries incidence. b. Smooth surface caries occur due to streptococcus mutans c. Pit and fisssure caries can be prevented by using pit and fissure sealants d. Lactobacillus is the main causative organism in plaque 5 / 60 What are the predominant plaque bacteria in periodontitis? a. Anaerobic rods (+) b. Facultative anaerobia cocci (+) c. Facultative anaerobia cocci (-) d. Anaerobic rods (-). 6 / 60 Which of the following statements on dentoalveolar abscess is true? a. it often resolves without antibiotics after adequate drainage. b. it is frequently implicated as a cause of brain abscess c. it is a infection of sublingual and submandibular spaces d. it is often precipitated by bacteria from the systemic route (anachoresis) 7 / 60 Turbid dentin in carious tooth is all EXCEPT:? a. Zone of bacterial invasion b. Zone that need not be removed before restoration. c. Zone in which collagen is irreversibly denatured d. Zone which cannot be remineralised 8 / 60 The bacteria detected in localized aggressive periodontitis are:? a. Borrelia vincenti and medium size spirochetes. b. Treponema denticola and fusobacterium nucleatum. c. A. actinomycetemcomitans, Capnocytophaga spp. and Porphyromonas gingivalis. d. Fusiformis and Tanerella forsythus. 9 / 60 Which of the following statements on complication of Ludwigβs angina is INEXACTE? a. Respiratory tract infections. b. pread of infection to masticator c. Airway obstruction due to edema of glottis d. Death due to asphyxiation 10 / 60 The mutans group of streptococci are key cariogenic pathogens. Which of the following belongs to the mutans group? a. Streptococcus saprophyticus b. Streptococcus pneumonia. c. Streptococcus mutans d. Streptococcus pyogenes 11 / 60 Viruses can be cultivated in? a. Tissue culture b. Blood culture. c. Broth d. Lab media 12 / 60 The primary cause of periodontal diseases is? a. Dental Plaque b. Calculus c. Malocclusion d. Restoration. 13 / 60 What are the predominant plaque bacteria in healthy condition? a. Anaerobic cocci (+) and rods (+) b. Facultative anaerobia cocci (-) and rods (-) c. Facultative anaerobia cocci (+) and rods (+) d. Anaerobic cocci (-) and rods (-). 14 / 60 Chronic periodontitis is characterized by INEXACT:? a. tooth mobility and migration b. gingival recession c. systemic symptoms like fever d. absence of pain in general. 15 / 60 Widely accepted theory of dental caries is π a. Acidogenic theory b. Proteolytic chelation theory c. Autoimmune theory. d. Proteolytic theory 16 / 60 Mouthwashes contain several chemical agents to effectively control oral malodor. Select the agent that does not belong in mouthwashes:? a. alcohol b. Cetylpyridinium. c. essential oils d. Chlorhexidine gluconate 17 / 60 Which of the following procedures can be regarded as optimal for controlling cross infection in a dental clinic? a. Wearing a single face mask for 3 h b. Wearing gloves after removal of all hand jewellery. c. Wearing headgear for all operational procedures d. Washing the gloves and reusing after visual examination of a patient 18 / 60 The dietary carbohydrate most likely involved in etiology of dental caries is π a. Polysaccharide b. Xylitol. c. Sucrose d. Dextran 19 / 60 The main causative agent of Ludwig angina is:? a. Staphylococci b. Treponema pallidum c. Streptococcus pneumonia d. Fusobacteria. 20 / 60 Which of the following statements on aggressive periodontitis is EXACTE? a. Initiation is onset of puberty b. 95% of all periodontal diseases. c. Prevalence and severity decrease with age d. Most prevalent disease globally 21 / 60 Dentoalveolar abscess is treated by:? a. Gingivectomy b. Drainage through the gingival sulcus or by an external incision. c. Gingivoplasty d. Periodontal flap procedure 22 / 60 Initiation of dental caries depends upon:? a. Localisation of acid over tooth surface. b. availability of carbohydrate food c. formation of large amount of acid d. viscosity of saliva 23 / 60 How to manage dental caries? a. Eliminate primary source of infection b. Minimal cavity preparation techniques c. Institute surgical drainage. d. Initial local debridement with ultrasonic scaling 24 / 60 Microorganism that can grow in the presence as well as in the absence of molecular oxygen is? a. obligatory anaerobic b. facultatively anaerobic. c. obligatory aerobic d. microaerobically 25 / 60 The main causative agent of Ludwig’s angina is:? a. Porphyromonas b. Legionella infection c. Staphylococci d. Group A streptococci. 26 / 60 Which of the following statements on diagnosis of dental caries is INEXACTE? a. Organoleptic assessment. b. Probing c. Electrical impedance d. Laser fluorescence 27 / 60 ααααααΎ Microscope Γ©lectronique αααααα»αααΆαααααΆαααααΆα αβ ααα’αΆα ααΎαααΎα ααΌααα ααΆαααααααα αα·α α ααα»α ααααΌα α αβ αα·ααααα αα·αα·ααα π a. ααΆααααααΈ Grams positif b. ααΆααααααΈ Grams positif α¬ Grams nΓ©gatif c. ααΈα αααΆ (mobilitΓ© ) ααΌαααΆα ( forme ) d. αααααΆαααΆαα- αα»ααααα½αααΆααααααΈ 28 / 60 ααΆααααααΈαααααααΎα’αααα»ααααα αααΈα’αΆα αΆαααααα»ααααααα’αααΈ ? a. Streptocoque b. Staphylocoque c. Pneumcoque d. Clostridium 29 / 60 Mycoplasme ααΊααΆααα½αααΆααααααΈαααααααΆα? a. Paroi b. glycocalix + paroi c. capsule + paroi d. ααααΆααααΈααΌααααΆα 30 / 60 αααα»αααΆαααααΆαα αΌαααααΆαααΆαα»αα·αα αααΈα’αΆα αΆαααααααΆααααααΈαααααα permΓ©ase ααΆα? a. PermΓ©ase Γ‘ ions (K,PO4, SO4) and PermΓ©ase Γ‘ protein , permΓ©ase Γ‘ acide amines b. PermΓ©ase Γ‘ sucre , PermΓ©ase Γ‘ glucose c. PermΓ©ase Γ‘ ions d. PermΓ©ase Γ‘ protein , permΓ©ase Γ‘ acide amines 31 / 60 ααΆαααΆαα»ααΆααααααααααααΆαα αα·αααΆαααΈαααΌαααΆααααααααΆααααααΈ? a. ααΆαααΆαα»αα αα½α Antiseptique ααααα b. ααΆαααΆαα»ααβ ααα½α Antiseptique c. ααΆαααΆαα»αα αα½α Antiseptique ααααΆαα d. ααΆαααΆαα»αα αα½α antibiotique,αα ααα½α Antiseptique ααααΆαα ,ααααα and ααΆαααΆαα»αα αα½α Antiseptique ααααα 32 / 60 ααααααΎl Microscope optique αα·αα·ααααααα»ααααΆαααααα (Γ‘ l ‘Γ©tat frais) ααΊαα·ααααΆαα·αα·αααααΈ π a. ααΌαααΆα ( forme ) b. ααΆααααααΈ Grams nΓ©gatif c. ααΌαααΆα ( forme ) αα·αααΈα αααΆ (mobilitΓ© ) α d. ααΆααααααΈ Grams positif 33 / 60 ααΆαααααΆαα αΌαααααΆαααΆαα» αα·αα αααΈα’αΆα αΆαααααααΆααααααΈ ααΆαααΆααΆαααΆαα»ααΆ forme complex αα»ααα·αααΆααααααΈαααα ααααΎααααΆααααΆαααααΌαααααΆαααααααααexoenzyme ααΆαα»ααα·α ααΆαααΆαα»ααΆαααααααΆα? a. ProtΓ©ine , polymΓ©re, polyose b. Base pyruvique ,Vitamine, ATP c. PolymΓ©re , acide amine, ATP d. PolymΓ¨re, ATP ,Vitamine 34 / 60 ααΆααααααΈαααααα MΓ©sophile α’αΆα ααααα αααα»αααΈαα»ααα ααΆα? a. 10-20 ΛC b. 10-15 ΛC c. 40-50 ΛC d. 20-40 ΛC 35 / 60 ααΆααααααΈαααααΆαααααΌαααααααα»αααααΊ? a. Thermophile b. cryophile c. MΓ©sophile d. psychophile 36 / 60 Major bacteria cause aggressive periodontitis? a. Actinobaccilus actinomycetemcomitans, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae b. Prevotella intermedia, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae c. Eikenella corrodens, Capnocytophaga sputigena, Actinobaccilus actinomycetemcomitans, Prevotella intermedia d. Capnocytophaga sputigena, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae 37 / 60 Major bacteria cause periodontitis π a. Fusobacterium nucleatum, Petostreptococcus micros, Enterococcus, Borrela vincenti b. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Pneumococcus c. Fusobacterium nucleatum, E.coli, Streptococci, Borrela vincenti d. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Borrela vincenti 38 / 60 Analytical techniques for monitoring biofilms by βIndirect detectionβ π a. Detection of proteins by molecular biology technique b. Microscopy techniques c. High Pressure Liquid Chromatography (HPLC) d. Detection of DNA by molecular biology technique 39 / 60 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 40 / 60 Major bacteria cause chronic periodontitis:? a. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Pseudomonas aeruginosa b. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Streptococcus anginosus c. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae,Stphylococcus aureus d. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, E.coli 41 / 60 Steps in order to perform bacteriological diagnostic of oral microbiology:? a. Antimicrobial Susceptibility testing, Direct examination , Gram stain, Culture , Identification , b. Direct examination , Gram stain, Antimicrobial Susceptibility testing, Culture , Identification , c. Direct examination , Gram stain, Culture , Identification , Antimicrobial Susceptibility testing d. Identification , Direct examination , Gram stain, Culture , Antimicrobial Susceptibility testing 42 / 60 Principal Cocci Gram negative bacteria found in oral cavity:? a. Streptococcus b. Veillonella c. Enterococcus d. Gemella 43 / 60 Principal Cocci Gram positive bacteria found in oral cavity:? a. Peptostreptococcus b. Veillonella c. Moraxella d. Neisseria 44 / 60 Strategy to control of biofilm pH in oral biofilm:? a. Antiflammatory agents b. Fluoride c. Generating nutrients d. Inhibition of key microbial enzyme 45 / 60 Infections of the mucosa are more usually associated with transient oral bacteria, which one is incorrect? a. Helicobacter b. Pseudomonas c. Staphylococcus d. Enterococcus 46 / 60 Major bacteria usually cause dental caries:? a. Mutans Streptococci, Lactobacilli, Clostridium b. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus c. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus d. Mutans Streptococci, Lactobacilli, Actinomyces vicosus 47 / 60 Which bacteria that is not always presence in saliva:? a. Streptococcus mitis b. Streptococcus oralis c. Streptococcus agalactiae d. Streptococcus salivarius 48 / 60 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. 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 d. 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 49 / 60 Principal Rods Gram negative bacteria found in oral cavity:? a. Corynebacterium b. Eubacterium c. Lactobacillus d. Porphyromonas 50 / 60 On tooth surface, bacteria that participate actively in adhesion of primary colonizers? a. Pseudomonas stains b. Streptococcus stains c. Staphylococcus stains d. Enterococcus stains 51 / 60 The most common bacterium that is responsible for tonsillitis and pharyngitis is:? a. Streptococcus mitis b. Streptococcus mutans c. Group-A beta hemolytic Streptococcus ( Streptococcus pyogenses) d. Group-B beta hemolytic Streptococcus ( Streptococcus agalactiae) 52 / 60 Steps in order for biofilm formation:? a. Maturation and detachment, adhesion, colonization, coadhesion b. Coadhesion , adhesion, colonization, maturation and detachment c. Adhesion, colonization, coadhesion , maturation and detachment d. Colonization , adhesion, coadhesion , maturation and detachment 53 / 60 Infection in oral cavity by oral flora, which proposition is inexact? a. Changes in exposure to antiseptic b. Administration of antibiotics c. Changes in the immune system d. Changes in salivary flow 54 / 60 There are some main routes of infection in oral cavity, which one is inexact? a. Required by transient flora b. Transferred by hands or objects c. Transferred by insects bite. d. Transferred through the air on dust particles or water droplets 55 / 60 Porphyromonas gingivalis:? a. Are Gram-positive pleomorphic rods b. Are aggressive periodontal pathogens c. Are isolated from many extra oral sites d. Are non-capsulated 56 / 60 The virulence of Porphyromonas gingivalis is partly due to? a. Adhesins b. Hyaluronic acid c. Proteases, haemolysin and collagenase d. Cytotoxins 57 / 60 Which microorganism implicated in pit and fissure caries? a. Streptococcus mitis b. Staphylococcus aureus c. Streptococcus mutans d. Actinimyces viscosus 58 / 60 AIDS virus is ? a. DNA virus b. RNA virus c. Retro virus d. Enterovirus 59 / 60 A patient attends the surgery with bilateral swelling of the parotid salivary glands. Which condition are they suffering from? a. Rubella b. A. Measles c. Mumps d. Poliomyelitis 60 / 60 Herpagina is usually cause by? a. Group A coxsackieviruses b. Hepatitis A virus c. Group B coxackieviruses d. Cytomegalovirus Your score isThe average score is 0% Facebook 0% Restart quiz Any comments? Send feedback
