MCQOPTIONS
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MCQOPTIONS
This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your Actinomycetes and Non Sporing Anaerobes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
All of the following are true about anthrax except: |
| A. | Plasmid is responsible for toxin production |
| B. | Cutaneous anthrax generally resolve spontaneously |
| C. | Capsular polypeptide aids virulence by inhibiting phagocytosis |
| D. | Toxin is a complex of two fractions |
| Answer» E. | |
| 2. |
Which of the following is not true of Actinomycosis: |
| A. | Demonstration of filaments |
| B. | Caused by Actinomyces Israeli |
| C. | Organism cannot be cultured |
| D. | Sulfur granules in pus |
| Answer» D. Sulfur granules in pus | |
| 3. |
Anthrax bacilli differs from anthracoid bacilli by being: |
| A. | Non-capsulated |
| B. | Strict aerobe |
| C. | Non-motile |
| D. | Hemolytic colonies on blood |
| Answer» D. Hemolytic colonies on blood | |
| 4. |
Medusa head colonies on nutrient agar is seen in: |
| A. | Pneumococcus |
| B. | Legionella |
| C. | Brucella |
| D. | Anthrax |
| Answer» E. | |
| 5. |
True about anthrax toxin are all except: |
| A. | Has three fractions |
| B. | Increase cAMP |
| C. | Coded by plasmid |
| D. | Inhibits protein synthesis |
| Answer» E. | |
| 6. |
Mc fadyean reaction seen with which organism: |
| A. | Clostridium perfrigens |
| B. | Clostridium botulinum |
| C. | Bacillus cereus |
| D. | Bacillus anthracis |
| Answer» E. | |
| 7. |
Bacillus anthracis toxin radiates its action through all except: |
| A. | cAMP |
| B. | Stimulating macrophages |
| C. | TNF |
| D. | cGMP |
| Answer» E. | |
| 8. |
A discharging sinuses seen in: |
| A. | Sporotrichosis |
| B. | Cryptococcosis |
| C. | Histoplasmosis |
| D. | Mycetoma |
| Answer» E. | |
| 9. |
A Person developed severe vomiting after eating food from a Chinese restaurant, 3 hours before. Most likely causative agent is: |
| A. | Staph.aureus |
| B. | B.dereus |
| C. | C.difficle |
| D. | Pseudomonas |
| Answer» C. C.difficle | |
| 10. |
Which of the following is false about mycetoma: |
| A. | Can affect lower and upper extremities |
| B. | Caused by actinomycetes and filamentous fungi |
| C. | Diagnosis is by examination of pus |
| D. | Uncommon in India |
| Answer» E. | |
| 11. |
Actinomycosis most common site: |
| A. | Cervicofacial |
| B. | Thorax |
| C. | Abdomen |
| D. | Brain |
| Answer» B. Thorax | |
| 12. |
A patient is suffering from pneumonia. Laboratory study shows an acid-fast filamentous bacterium. The causative organism is: |
| A. | M.tuberculosis |
| B. | Actinomyces |
| C. | Nocardia |
| D. | Mycobacterium Avium Intracellulare |
| Answer» D. Mycobacterium Avium Intracellulare | |
| 13. |
Color of granule of actinomycetes: |
| A. | Black |
| B. | Yellow |
| C. | Red |
| D. | Brown |
| Answer» B. Yellow | |
| 14. |
True regarding anthrax is all except: |
| A. | Caused by insect bite |
| B. | Caused by rubbing of skin |
| C. | Cutaneous type is rate nowadays |
| D. | Pulmonary infection occurs by inhalation |
| Answer» D. Pulmonary infection occurs by inhalation | |
| 15. |
Sulphur granules are seen in: |
| A. | Rhinoscleroma |
| B. | Actinomycetes |
| C. | Candida fungi |
| D. | Listeria-monocytogenes |
| Answer» C. Candida fungi | |
| 16. |
Actinomycosis caused by: |
| A. | Gram+ve organism |
| B. | Gram-ve bacteria |
| C. | Anaerobic bacteria |
| D. | Fungus |
| Answer» B. Gram-ve bacteria | |
| 17. |
Lactobacilli grow best under |
| A. | strict anaerobic conditions |
| B. | microaerophilic conditions in presence of 5% CO2 and PH6 |
| C. | microaerophilic conditions in presence of 3% CO2 and PH5 |
| D. | microaerophilic conditions in presence of 2% CO2 and PH4 |
| Answer» C. microaerophilic conditions in presence of 3% CO2 and PH5 | |
| 18. |
The specific test for Treponema pallidum is___________? |
| A. | VDRL |
| B. | Kahn s test |
| C. | TPHA |
| D. | Widal test |
| Answer» D. Widal test | |
| 19. |
All of the following are true of streptococcus except_____________? |
| A. | It s group of lactic acid production bacteria |
| B. | Shows adherence to dental enamel |
| C. | Most common in humans |
| D. | Most common is animals |
| Answer» B. Shows adherence to dental enamel | |
| 20. |
An oxidase-positive, gram-negative rod which produces a bluish-green pigment has been grown in culture from a swab obtained from an infected burn wound. This organism is susceptible to gentamicin, ticarcillin and tobramicin, but resistant to all the other antibiotics which of the following organisms is it likely to be ? |
| A. | Escherichia coli |
| B. | Klebsiella pnemoniae |
| C. | Proteus miribilis |
| D. | Pseudomonas aeruginosa |
| Answer» E. | |
| 21. |
Bacteria reproduce mainly by______________? |
| A. | Budding |
| B. | Binary fission |
| C. | Sporing |
| D. | Bacterial components produced by host cells |
| Answer» C. Sporing | |
| 22. |
The causative organism of syphilis is___________? |
| A. | Borrelia burgolorferi |
| B. | Chalamydia trachomatis |
| C. | Leptospira interrogans |
| D. | Treponema pallidum |
| Answer» E. | |
| 23. |
Which of the following are non-spore forming anaerobic bacteria that asume major significance in disease processes________________? |
| A. | Fusobacterium nucleatum |
| B. | Peptostreptococcus anaerobius |
| C. | Actinomyces Israeli |
| D. | All of the above |
| Answer» E. | |
| 24. |
Actinomyces differs from bacteria in that: |
| A. | Gram-positive |
| B. | Filamentous organism |
| C. | Non-motile |
| D. | Non-acid fast |
| Answer» C. Non-motile | |
| 25. |
A patient with sulfur granules discharging from sinus, suggestive of infection with: |
| A. | Staphylococcus |
| B. | HH ducryei |
| C. | Mycetoma |
| D. | Sporotrichosis |
| Answer» D. Sporotrichosis | |
| 26. |
Capsule of Bacillus anthracis is formed of: |
| A. | Polysaccharide |
| B. | Lipopolysaccharide |
| C. | Polypeptide |
| D. | Long-chain fatty acids |
| Answer» D. Long-chain fatty acids | |
| 27. |
A child is presenting with vomiting and abdominal pain after 5 hours of eating some food. The most likely causative organism: |
| A. | Bacillus cereus |
| B. | CL.perfringens |
| C. | CL.botulinum |
| D. | V.cholerae |
| Answer» B. CL.perfringens | |