Micro 2 Exam 1 Flashcards
Mycobacteria, Anaerobes, Spirochetes, Obligate intracellular, Mycoplasma/Ureplasma (50 cards)
An animal attendant at the zoo became ill. Symptoms included fever, chills, headache, severe myalgia, and malaise. This person’s urinalysis was abnormal with protein and blood present. A couple of weeks earlier, the attendant was handling the chimpanzees and one of the chimps urinated on him.
What is the most likely cause of their symptoms?
a. Borrelia spp
b. Leptospira spp
c. Treponema spp
d. Helicobacter spp
b. Leptospira spp
Spirochetes include all of the following EXCEPT:
a. Borrelia spp
b. Leptospira spp
c. Treponema spp
d. Helicobacter spp
d. Helicobacter spp
What diseases do the Borrelia species cause?
a. Undulant and hemorrhagic fevers
b. Lyme disease and Relapsing fever
c. Rocky Mountain spotted fever and Relapsing Fever
d. Lyme disease and Parrot Fever
b. Lyme disease and Relapsing fever
What organism causes Lyme disease?
a. Borrelia burgdorferi
b. Borrelia recurrentis
c. Leptospira interrogans
d. Treponema pallidum ssp. pallidum
a. Borrelia burgdorferi
A young woman notices a bruise that looks like a bull’s eye target on her lower leg. She cannot remember getting bruised, even though she went hiking through the woods last weekend. The bruise goes away in about a week and she thinks nothing more about it.
About 2 weeks later, she begins to feel very bad. She has joint and bone pain, extreme fatigue, and her heart just “doesn’t feel right.” She does recall having to deal with ticks after the hike.
What disease does she most likely have?
a. Lyme disease
b. Relapsing fever
c. Undulant fever
d. Duck fever
a. Lyme disease
All of the following diseases are caused by Treponema EXCEPT:
a. Syphilis
b. Yaws
c. Rock Mountain Spotted Fever
d. Pinta
c. Rock Mountain Spotted Fever
Spirochetes that are often detected in the hematology laboratory with a CBC Wright’s or Giemsa stain, even before the physician suspects a particular infection (disease), are:
a. Borrelia species (relapsing fever)
b. Treponema spp. (syphilis)
c. Campylobacter spp. (Campylobacteriosis)
d. Leptospira spp. (Leptospirosis)
e. Borrelia burgdorferi (Lyme disease)
a. Borrelia species (relapsing fever)
A man is taking a shower and notices a lesion on his penis that is not tender, but is firm, with a clean surface and raised edges. He is quite concerned and goes to his physician. the physician orders a rapid plasma reagin (RPR) test and a darkfield microscopy test. Both tests are positive.
What is the physician’s probable diagnosis?
a. Gonorrhea
b. Nongonococcal urethritis (NGU)
c. Plasma-reaginosis
d. Syphilis
d. Human papillomavirus (HPV)
d. Syphilis
What substances do organisms that can tolerate and use oxygen have to protect themselves from superoxide anions?
a. Hyaluronidase and proteases
b. Exotoxins and superoxide dismutase
c. Enterotoxins and lipase
d. Mycolic acides
e. Superoxide dismutase and catalase/peroxidase
e. Superoxide dismutase and catalase/peroxidase
What type of bacteria are those in the genus Clostridium?
a. Anaerobic gram positive cocci
b. Spore-forming anaerobic gram positive bacilli
c. Spore forming anaerobic gram negative bacilli
d. Anaerobic branching gram positive bacilli
b. Spore-forming anaerobic gram positive bacilli
What organism most commonly causes gas gangrene?
a. Clostridium difficile
b. Clostridium tetani
c. Clostridium perfringens
d. Clostridium botulinum
e. Clostridium gangrenosis
c. Clostridium perfringens
An elderly patient in a nursing home is recovering from bacterial pneumonia. The patient has been on a lengthy regiment of antibiotics to kill the organism causing the disease. A few days later, the patient is diagnosed with pseudomembranous colitis.
What organism is the most likely cause?
a. Clostridium difficile
b. Clostridium tetani
c. Clostridium perfringens
d. Clostridium botulinum
e.Clostridium pseudomembranosis
a. Clostridium difficile
All of the following are non-spore-forming, anaerobic, gram-positive bacilli EXCEPT:
a. Actinomyces
b. Bifidobacterium
c. Eggerthella/Eubacterium
d. Clostridium
d. Clostridium
A physician notices her immunosuppressed patient’s sinus tracts that are draining pus. She also notices that there appear to be small, hard, yellow “nuggets” (sulfur granules) in the pus. What disease will his doctor most likely diagnose?
a. Gas gangrene
b. Pseudomembranous colitis
c. Actinomycosis
d. Myonecrosis
c. Actinomycosis
What evidence indicates the presence of anaerobes in cultures?
a. A foul odor upon opening an anaerobic jar or bag
b. Growth on the anaerobic plates, but not on the sheep blood agar (SBA) plates incubated in the CO2 incubator
c. Colonies on kanamycin-vancomycin laked blood agar (LKV) that fluoresce brick-red under ultraviolet light
d. all of the above
d. all of the above
Anaerobic small gram-positive rods (nonspore formers) were cultured from one blood culture bottle (at 5 days) obtained from a 25-year-old patient admitted to the hospital with dehydration, diarrhea, and other flulike symptoms. Five other blood culture bottles did not grow any organisms at 7 days and were discarded. The following results were obtained from the recovered anaerobe:
Indole: +
Catalase: +
Nitrate: +
Kanamycin: Sensitive
Vancomycin: Sensitive
Colistin: Resistant
a.Eggerthella/Eubacteriu lentum
b. Corynebacterium spp.
c. Propionibacterium acnes
d. Actinomyces israelii
e. Peptostreptococcus anaerobius
c. Propionibacterium acnes
A microbiology technologist is reading an anaerobic wound culture and observes a double zone of hemolysis on an anaerobically incubated blood agar plate. The Gram stain of that organism was a boxcar-shaped, gram-positive bacillus. What is the most likely identification of this organism?
a. Bacillus anthracis
b. Clostridium perfringens
c. Clostridium difficile
d. Clostridium tetani
e. Clostridium septicum
b. Clostridium perfringens
A microbiology technologist is reading an anaerobic plate from an intestinal abscess.
There is growth on the Bacteroides-Bile-Esculin (BBE) plate: gray colonies with a brown/black color in the area around the colonies. There is also a dark precipitate in the medium in the areas of heavy growth. The tech gram stains the colonies and observes gram-negative coccobacilli.
What is the presumptive identification of this organism?
a. Fusobacterium necrophorum
b. Bacteroides fragilis group
c. Prevotella melaninogenica
d. Borrelia recurrentis
b. Bacteroides fragilis group
Which of the following reactions is incorrect for Clostridium perfringens?
a. Lecithinase positive
b. Double zone of hemoysis on anaerobic blood agar
c. Reverse CAMP positive
d. Gram positive but easily decolorize and look negative
e. All of these are correct
c. Reverse CAMP positive
A gram-negative anaerobic bacillus with tapered or pointed ends is most likely:
a. Porphyromonas assaccharolytica
b. Propionibacterium acnes
c. Fusobacterium necrophorum d. Fusobacterium nucleatum
e. Bacteroides fragili
d. Fusobacterium nucleatum
A clean-catch urine was submitted for an anaerobic culture. The technologist should:
a. Reject the specimen as inappropriate for the test requested
b. Centrifuge the specimen and inoculate the culture media with the sediment
c. Prepare a gram stain and culture if white blood cells are present
d. Decontaminate the specimen with NaOH/NALC before inoculating the media
a. Reject the specimen as inappropriate for the test requested
Mycoplasmas differ from other types of bacteria because they do not have a:
a. Cell membrane
b. Cell wall
c. Nuclear membrane
d. Messenger transporter
b. Cell wall
What organism causes atypical or ‘walking’ pneumonia?
a. Mycoplasma hominis
b. Mycoplasma urealyticum
c. Streptococcus pneumoniae
d. Mycoplasma pneumoniae
e. Mycobacterium kansasii
d. Mycoplasma pneumoniae
At-risk groups for contracting ‘walking’ pneumonia include all the following EXCEPT:
a. Prisoners
b. College students
c. Military personnel
d. newborns
d. newborns
