ASCP MLS Domain 6: Microbiology Welcome to your ASCP MLS Domain 6: Microbiology 1. ASCP MLS: Microbiology Which organism is most commonly associated with cold autoantibody autoimmune hemolytic anemia? A. Mycoplasma pneumoniae B. Escherichia coli C. Staphylococcus aureus D. Streptococcus pyogenes None 2. ASCP MLS: Microbiology In a patient with a prosthetic valve, which organism is a common cause of subacute bacterial endocarditis? A. Staphylococcus aureus B. Streptococcus bovis C. Staphylococcus epidermidis D. Streptococcus pneumoniae None 3. ASCP MLS: Microbiology Which of the following organisms is an obligate intracellular parasite known to cause Q fever? A. Coxiella burnetii B. Francisella tularensis C. Brucella spp. D. Legionella pneumophila None 4. ASCP MLS: Microbiology What is the primary virulence factor of Vibrio cholerae that contributes to its pathogenicity? A. Flagellum B. Cholera toxin C. Capsule D. Pili None 5. ASCP MLS: Microbiology Which organism is known to produce a red pigment at room temperature and is a common cause of urinary tract infections? A. Serratia marcescens B. Proteus mirabilis C. Pseudomonas aeruginosa D. Escherichia coli None 6. ASCP MLS: Microbiology What is the characteristic morphology of Campylobacter jejuni on a gram stain? A. Gram-positive cocci B. Gram-negative rods C. Gram-negative spiral-shaped D. Gram-positive bacilli None 7. ASCP MLS: Microbiology Which organism is primarily responsible for causing atypical pneumonia and is known for its lack of a cell wall? A. Mycoplasma pneumoniae B. Streptococcus pneumoniae C. Klebsiella pneumoniae D. Haemophilus influenzae None 8. ASCP MLS: Microbiology In the identification of fungi, what is the significance of observing a "spaghetti and meatballs" appearance under the microscope? A. Indicates the presence of Candida albicans B. Suggests a dermatophyte infection C. Signifies the presence of Malassezia furfur D. Indicates Aspergillus species None 9. ASCP MLS: Microbiology What is the main reason for performing an acid-fast stain in microbiology? A. To identify fungi in clinical samples B. To detect the presence of Mycobacterium species C. To differentiate between gram-positive and gram-negative bacteria D. To identify parasites in stool samples None 10. ASCP MLS: Microbiology Which of the following bacteria is known to cause gas gangrene? A. Clostridium perfringens B. Staphylococcus aureus C. Escherichia coli D. Bacillus cereus None 11. ASCP MLS: Microbiology In the context of antimicrobial susceptibility testing, what does the minimum inhibitory concentration 'MIC' indicate? A. The maximum concentration of an antibiotic that kills the bacteria B. The lowest concentration of an antibiotic that prevents the growth of the organism C. The concentration of antibiotic at which bacteria develop resistance D. The rate at which an antibiotic is metabolized by bacteria None 12. ASCP MLS: Microbiology Which organism is known to cause a "bull's-eye" rash in humans and is a common vector-borne pathogen in North America? A. Borrelia burgdorferi B. Rickettsia rickettsii C. Treponema pallidum D. Leptospira interrogans None 13. ASCP MLS: Microbiology What is the primary reservoir for the bacteria Yersinia pestis, which causes plague? A. Domestic cats B. Rodents C. Canines D. Cattle None 14. ASCP MLS: Microbiology In laboratory diagnostics, what is the significance of detecting "safety pin" appearance in a Gram stain for a rod-shaped bacterium? A. It indicates the presence of Clostridium tetani. B. It is characteristic of Yersinia pestis. C. It signifies infection with Escherichia coli. D. It is associated with Bacillus anthracis. None 15. ASCP MLS: Microbiology Which of the following organisms is a Gram-negative rod that can cause gastroenteritis and is notably resistant to third-generation cephalosporins? A. Salmonella Typhi B. Escherichia coli O157:H7 C. Campylobacter jejuni D. Klebsiella pneumoniae None 16. ASCP MLS: Microbiology What is the hallmark microscopic feature of Cryptococcus neoformans when visualized using India ink? A. Budding yeast with a large capsule B. Hyphae with branching at 45-degree angles C. Gram-positive cocci in clusters D. Spaghetti and meatballs appearance None 17. ASCP MLS: Microbiology Which of the following tests is used to differentiate Staphylococcus aureus from other staphylococci? A. Catalase test B. Oxidase test C. Coagulase test D. Urease test None 18. ASCP MLS: Microbiology Legionella pneumophila, the bacterium responsible for Legionnaires' disease, primarily infects which of the following human organs? A. Liver B. Lungs C. Kidneys D. Brain None 19. ASCP MLS: Microbiology In the identification of Enterobacteriaceae, what does a positive result in the methyl red test indicate? A. The ability to ferment lactose B. The production of stable acid end products from glucose fermentation C. The production of gas from glucose fermentation D. The ability to utilize citrate as a carbon source None 20. ASCP MLS: Microbiology Which fungal organism is commonly associated with bird droppings and can cause severe respiratory infections in immunocompromised individuals? A. Candida albicans B. Aspergillus fumigatus C. Cryptococcus neoformans D. Histoplasma capsulatum None 1 out of 20 Time is Up! Time's up
