Oral Microbiology Test 0% 0 votes, 0 avg 144 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 Demineralization of inorganic portion and destruction of organic of tooth is known as:? a. Dentinal caries b. Dental caries c. Enamel caries d. Pulpitis. 2 / 60 Probiotics exhibit all BUT the following characteristics:? a. Have beneficial effect on host. b. Mimic antibiotics c. Remain viable for a long time d. Nontoxic and nonpathogenic to host 3 / 60 Which of the following statements on complication of Ludwigβs angina is INEXACTE? a. Death due to asphyxiation b. pread of infection to masticator c. Airway obstruction due to edema of glottis d. Respiratory tract infections. 4 / 60 True about caries, all EXCEPT:? a. Chronic endogenous infection b. Demineralization of enamel. c. Not due to microorganisms d. Microorganisms play the most essential role 5 / 60 An example of a nonspecific chemical barrier to infection is…? a. cytotoxic T cells. b. cilia in the respiratory tract c. lysozyme in saliva d. unbroken skin 6 / 60 Mouthwashes used for controlling oral malodor should contain? a. Sugar to make them more palatable to consumers b. Antibacterial agent c. Alcohol d. Xylitol. 7 / 60 Which of the following statements on dental caries is INEXACTE? a. Destruction of tissues of tooth by bacterial fermentation of dietary carbohydrates. b. Commonly associated with malnutrition and possibly systemic diseases c. Chronic endogenous infection caused by normal oral commensal flora d. Carious lesion is result of demineralization of enamel 8 / 60 What are the predominant plaque bacteria in healthy condition? a. Facultative anaerobia cocci (+) and rods (+) b. Anaerobic cocci (+) and rods (+) c. Anaerobic cocci (-) and rods (-). d. Facultative anaerobia cocci (-) and rods (-) 9 / 60 Viruses that persist in the cell and cause recurrent disease are considered? a. oncogenic b. cytopathic c. latent d. resistant. 10 / 60 Which of the following bacteria that is predominant in healthy condition? a. Streptococcus sanguinis b. Streptococcus milleri c. Actinomyces viscsus d. Actinomyces israelii. 11 / 60 The organisms which can grow best in the presence of a low concentration of oxygen? a. Aerobic b. Anaerobic. c. Aerophilic d. Microaerophilic 12 / 60 How to manage dental caries? a. Minimal cavity preparation techniques b. Institute surgical drainage. c. Eliminate primary source of infection d. Initial local debridement with ultrasonic scaling 13 / 60 Which of the following statements on dental caries are true? a. approximately 90% of people over 60 years in the West have root surface caries b. recurrent caries is commonly associated with an existing restoration. c. signs of fissure caries can be first detected in dentine d. fissure caries is commonly seen in the lingual surface of the incisors 14 / 60 Caries, all are true except:? a. Smooth surface caries occur due to streptococcus mutans b. Lactobacillus is the main causative organism in plaque c. Pit and fisssure caries can be prevented by using pit and fissure sealants d. Fluorides help in reducing caries incidence. 15 / 60 Which of the following statements on diagnosis of dental caries is INEXACTE? a. Electrical impedance b. Laser fluorescence c. Probing d. Organoleptic assessment. 16 / 60 Chronic periodontitis is characterized by INEXACT:? a. tooth mobility and migration b. absence of pain in general. c. systemic symptoms like fever d. gingival recession 17 / 60 Which of the following statements on Ludwigβs angina is INEXACTE? a. little amount of pus is yielded on surgical drainage. b. it may warrant an urgent tracheostomy c. the majority of cases are due to submandibular sialadenitis d. it needs to be treated with high-dose, parenteral metronidazole and penicillin 18 / 60 Lysozyme is present in? a. Sweat b. Cerebro spinal fluid (CSF) c. Urine d. Saliva. 19 / 60 Members of the genus Lactobacillus are normal microflora of the? a. Hair b. Mouth c. Skin d. Nasopharynx. 20 / 60 Microorganisms play the most essential role.? a. Dental caries is associated with: b. Streptococcus anginosus. c. Streptococcus agalactiae d. Streptococcus mutans e. Streptococcus bovis 21 / 60 Predisposing factors for acute necrotizing ulcerative gingivitis include INEXACT:? a. heavy smoking b. severe malnutrition c. diabetes. d. immunodeficiency 22 / 60 Aggressive periodontitis is treated by:? a. Penicillin 500 mg 3 times/day for 3 weeks b. Amoxicillin 500 mg 3 times/day for 2 weeks. c. Metronidazole 250 mg 3 times/day for 1 weeks d. Tetracycline 250 mg 3 times/day for 4 weeks 23 / 60 The peak incidence of juvenile periodontitis in children occurs at ages:? a. 10-13 years. b. 1-3 years c. Birth-6 months d. 5-7 years 24 / 60 Which of the following statements on chronic periodontitis is INEXACTE? a. Morbidity 70β80% b. 95% of all periodontal diseases. c. Most prevalent disease globally d. Prevalence and severity decrease with age 25 / 60 Microorganisms that are frequently implicated in the pathogenesis of periodontal abscess include:? a. Treponema pallidum b. Porphyromonas spp. c. Streptococcus pneumonia d. Staphylococci 26 / 60 Which of the following statements on acute necrotizing ulcerative gingivitis is INEXACTE? a. Possibly systemic diseases b. If untreated, ulcers enlarge and spread to involve marginal c. The disease may be inherited (autosomal recessive). d. Commonly associated with poor and neglected oral hygiene 27 / 60 ααΆαααΆαα»ααΆααααααααααααΆαα αα·αααΆαααΈαααΌαααΆααααααααΆααααααΈ? a. ααΆαααΆαα»ααβ ααα½α Antiseptique b. ααΆαααΆαα»αα αα½α Antiseptique ααααα c. ααΆαααΆαα»αα αα½α Antiseptique ααααΆαα d. ααΆαααΆαα»αα αα½α antibiotique,αα ααα½α Antiseptique ααααΆαα ,ααααα and ααΆαααΆαα»αα αα½α Antiseptique ααααα 28 / 60 virusααΆαααΌαααΆαααΌαααααΆαααΈααα? a. Helical, Icosahedral ,Spirillum (spirals ) b. Icosa,hedral, Complex, Coccus (sphere) c. Helical, Icosahedral, Complex d. Complex Helical,Bacillus(rods) 29 / 60 virus ααΆαα αα·ααααααα ααααΆαααααα ααααααΆααΆααα’ααα ααα½α? a. ααΈ b. ααααΆααα½α c. ααααΆα d. αα½α 30 / 60 α’αααΈαα αααα α ααΆ Ration totale ααααααΆααααααΈ? a. Ration de croissance +ααα·ααΆαα αααΈα’αΆα αΆαααααΆααααΌαααΆαααααααΆααααααΈ b. Ration de croissance and ααα·ααΆαα αααΈα’αΆα αΆαααααααααααΆααααααΈ c. Ration dβentretien andβ ααα·ααΆαα αααΈα’αΆα αΆαααααααααααΆααααααΈ d. Ration dβentretien, ααα·ααΆαα αααΈα’αΆα αΆαααααααααααΆααααααΈ and Ration de croissane 31 / 60 Mycoplasme ααΊααΆααα½αααΆααααααΈαααααααΆα? a. ααααΆααααΈααΌααααΆα b. capsule + paroi c. Paroi d. glycocalix + paroi 32 / 60 ααΆαα αααΎαααααα½αααΆααααααΈααααΎααΆαααΌαααΆαααα pH? a. pH 6-6.5 b. pH : 9-10 c. pH : 7-7.5 d. pH : 8-9 33 / 60 Micro-aΓ©rophile ααΊααΆααα½αααΆααααααΈαααααααΌαααΆα? a. ααΆαααααα O2 αα·α b. αα·αααααΌαααααα O2 c. ααΆαααααα O2 α αααΎα d. ααααα O2 αα·α ααααΆα α αααΎαΎαααααΆα 34 / 60 ααΎααααΈααα ααΆααααααΈααΆαα αααΈα’αΆα αΆαααα»ααααΆαααΆααα αα Ration totale ααααΆααααΆαααααα αααα»αααααααΆαα·? a. 1/400 b. 1/300 c. 1/600 d. 1/500 35 / 60 Paroi ααααΆααααααΈ Gram. Positif ααααααα? a. gelatin b. CΓ©ramique and Peptido-glycane ααααΉαααααΌα c. CΓ©ramique d. Peptido-glycane 36 / 60 ααΆααααααΈαααααα themophile α’αΆα ααααα αααα»αααΈαα»ααα ααΆαααΆαααααααΎαααΈ? a. 30 ΛC b. 37 ΛC c. 20 ΛC d. 40 ΛC 37 / 60 ααα ααααΈααααΌαααΆααααααααΆααα ( besoins Γ©nergΓ©tique )ααααΆααααααΎααααααααΌαααα»ααααααΆ ααΆαααΆαα»ααααΆαααααα»αααΆααααααΎαααΆαααααααααΆααααααΈ? a. carbone , Phosphore , Calcium b. ATP , ααΆαα·αααα , Calcium , O2 c. carbone , Phosphore , Calcium, ααΆαα·αααα d. ααΆαα·αααα ,ATP , A cΓ©tyl co-A , Glucose-6 Phosphate 38 / 60 αααα»αααΆαααααΆαα αΌαααααΆαααΆαα»αα·αα αααΈα’αΆα αΆαααααααΆααααααΈαααααα permΓ©ase ααΆα? a. PermΓ©ase Γ‘ protein , permΓ©ase Γ‘ acide amines b. PermΓ©ase Γ‘ ions c. PermΓ©ase Γ‘ sucre , PermΓ©ase Γ‘ glucose d. PermΓ©ase Γ‘ ions (K,PO4, SO4) and PermΓ©ase Γ‘ protein , permΓ©ase Γ‘ acide amines 39 / 60 Several infections occur in the oral cavity that are of relevance to the dental team. Which of the following infections does virus cause? a. Herpetic stomatitis b. Pericoronitis c. Acute necrotizing ulcerative gingivitis d. Lateral periodontal abcess 40 / 60 AIDS virus is ? a. Enterovirus b. Retro virus c. RNA virus d. DNA virus 41 / 60 Causative agent of scarlet fever? a. Staphylococcus aureus b. Streptococcus pyogens c. Streptococcus viridans d. None of these 42 / 60 Toxins or enzymes which are not produced by streptococcus pyogenes? a. Streptokinase b. Phosphate c. Hemolysin d. Hyaluronides 43 / 60 Porphyromonas gingivalis:? a. Are non-capsulated b. Are isolated from many extra oral sites c. Are aggressive periodontal pathogens d. Are Gram-positive pleomorphic rods 44 / 60 Herpagina is usually cause by? a. Group B coxackieviruses b. Hepatitis A virus c. Group A coxsackieviruses d. Cytomegalovirus 45 / 60 Epstein-Barr Virus (EBV)? a. Cause of infectious mononucleosis b. Group A infect: skin and mucous membranes c. Achieves latency in sensory ganglia d. Betaherpesvirus subfamily of herpesviruses 46 / 60 Which of the following statements on Prevotella Intermedia are true:? a. Black pigmented Gram-positive b. Implicated in periodontal disease in association with P. gingivalis c. Microaerophilic d. Implicated in dental Caries in association with Aggregatibacter actino- mycetemcomitans. 47 / 60 Actinobacillus actinomycetemcomitans possesses certain virulence factors that enable it to invade tissues, such as ? a. Hyaluronidase b. Streptodornas c. leukotoxin A d. hemolysine 48 / 60 Elderly patients sometimes present with a fungal infection of the palate, beneath a denture,referred to as denture stomatitis. Which organism causes this condition? a. Herpes simplex b. Candida albicans c. Actinomyces d. Staphylococcus aureus 49 / 60 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 50 / 60 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. Streptococcus pneumoniae b. Pseudomonas aeruginosa c. Klebsiella pneumoniae d. Mycobacterium tuberculosis 51 / 60 A bacterium that never found in tooth surface:? a. Streptococcus anginosus b. Streptococcus mutans c. Streptococcus mitis d. Streptococcus pneumoniae 52 / 60 In dental caries, the protective factor is π a. Acid producing bacteria b. Poor oral hygiene c. Antibacterials ( fluorides, Chlorhexidine, Xylitol) d. Frequent eating / drinking of fermentable carbohydrates 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 On tooth surface, bacteria that participate actively in adhesion of primary colonizers? a. Enterococcus stains b. Streptococcus stains c. Pseudomonas stains d. Staphylococcus stains 55 / 60 Bacteria usually cause Necrotizing Ulcerative Gingivitis? a. Borrelia vincentii and Eikenella corrodens b. Fusiform bacillus and Borrelia vincentii c. Fusiform bacillus and Capnocytophaga sputigena d. Borrelia vincentii and Porphyromonas endodontalis 56 / 60 Principal Rods Gram positive bacteria found in oral cavity:? a. Actinomyces b. Simonsiella c. Prevotella d. Eikenella 57 / 60 Major bacteria usually cause dental caries:? a. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus b. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus c. Mutans Streptococci, Lactobacilli, Actinomyces vicosus d. Mutans Streptococci, Lactobacilli, Clostridium 58 / 60 Among 4 phases of biofilm formation, the phase that is done the longest, about 7-14 days is:? a. Phase 2 b. Phase 1 c. Phase 4 d. Phase 3 59 / 60 Steps in order to perform bacteriological diagnostic of oral microbiology:? a. Direct examination , Gram stain, Culture , Identification , Antimicrobial Susceptibility testing b. Identification , Direct examination , Gram stain, Culture , Antimicrobial Susceptibility testing c. Antimicrobial Susceptibility testing, Direct examination , Gram stain, Culture , Identification , d. Direct examination , Gram stain, Antimicrobial Susceptibility testing, Culture , Identification , 60 / 60 Major bacteria cause chronic periodontitis:? a. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Pseudomonas aeruginosa b. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, E.coli c. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae,Stphylococcus aureus d. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Streptococcus anginosus Your score isThe average score is 86% Facebook 0% Restart quiz Any comments? Send feedback
