UAMS Microbiology Exam 2 questions with
complete solutions
1. Which organism or group is described by the following? GN spirochete; causes
syphilis.
Answer: Treponema pallidum
2. Which organism or group is described by the following? Nongonococcal urethritis in
males.
Answer: Ureaplasma urealyticum
3. Which organism or group is described by the following? GN spirochete-like (curved)
organism; causes gastric ulcers; rapid urease positive; rarely diagnosed by culture
methods.
Answer: Helicobacter pylori
4. Which media is used for Campylobacter jejuni?
Answer: Campy BAP or Skirrow media
5. Which organism or group is described by the following? GNR; joint and bone infections
in children (K. kingae); catalase negative (used to differentiate from Neisseria); oxidase
positive; glucose fermenter; can grow on MTM.
Answer: Kingella species
6. Which media is used for C. difficile?
Answer: CCFA agar
7. Which media is used for Vibrio species?
Answer: TCBS agar
8. Which media is used for Leptospira?
Answer: Fletcher's agar
9. Which organism or group is described by the following? Large GPR, "box car"; spore
former; double zone of beta hemolysis; lecithinase positive; reverse CAMP positive; gas
gangrene.
Answer: Clostridium perfringens
10. Name the anaerobic GNC (gram-negative cocci).
Answer: Veillonella
11. Which organism causes rat bite fever and is NOT culturable?
Answer: Spirillum minus
12. Which organism or group is described by the following? GN coccobacilli; co-infections
with Actinomyces israelii; star-shaped colonies; may pit/corrode the agar.
Answer: Aggregatibacter actinomycetemcomitans
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, 13. Which organism or group is described by the following? GN coccobacilli; hospital-
acquired infections; oxidase negative; nitrate negative.
Answer: Acinetobacter baumannii
14. What causes Q fever?
Answer: Coxiella burnetii
15. Which organism causes gas gangrene?
Answer: Clostridium perfringens
16. Which organism or group is described by the following? GN spirochete; transmitted by
lice; relapsing fever.
Answer: Borrelia recurrentis
17. Which organism or group is described by the following? Curved GNR with "seagull
wings"; grows on Campy BAP or Skirrow agar; darting motility; oxidase positive;
catalase positive.
Answer: Campylobacter species
18. Which organism causes pneumonia that is diagnosed serologically and affects kids and
young adults?
Answer: Chlamydia pneumoniae (C. pneumo)
19. What causes primary atypical pneumonia?
Answer: Mycoplasma pneumoniae
20. Which organism or group is described by the following? Small GNR (coccobacilli) with
bipolar staining; cat bites and scratches (NOT cat scratch fever).
Answer: Pasteurella multocida
21. Which organism or group is described by the following? GN coccobacilli; cause of
whooping cough; "mercury drop" colonies on Regan-Lowe or Bordet-Gengou.
Answer: Bordetella pertussis
22. Which media is used for Bordetella pertussis?
Answer: Bordet-Gengou or Regan-Lowe
23. Which organism or group is described by the following? Inhalation (from soil); Q fever.
Answer: Coxiella burnetii
24. Which organism or group is described by the following? GNR, long and fusiform with
pointed ends; "bread crumbs" or "ground glass" colonies on BAP; R to vancomycin; S
to kanamycin, colistin and bile.
Answer: Fusobacterium nucleatum
25. Which organism causes rat bite fever and appears as "fluff balls"?
Answer: Streptobacillus moniliformis
26. Which organism or group is described by the following? GPR; nerve toxin,
neuroparalytic.
Answer: Clostridium botulinum
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complete solutions
1. Which organism or group is described by the following? GN spirochete; causes
syphilis.
Answer: Treponema pallidum
2. Which organism or group is described by the following? Nongonococcal urethritis in
males.
Answer: Ureaplasma urealyticum
3. Which organism or group is described by the following? GN spirochete-like (curved)
organism; causes gastric ulcers; rapid urease positive; rarely diagnosed by culture
methods.
Answer: Helicobacter pylori
4. Which media is used for Campylobacter jejuni?
Answer: Campy BAP or Skirrow media
5. Which organism or group is described by the following? GNR; joint and bone infections
in children (K. kingae); catalase negative (used to differentiate from Neisseria); oxidase
positive; glucose fermenter; can grow on MTM.
Answer: Kingella species
6. Which media is used for C. difficile?
Answer: CCFA agar
7. Which media is used for Vibrio species?
Answer: TCBS agar
8. Which media is used for Leptospira?
Answer: Fletcher's agar
9. Which organism or group is described by the following? Large GPR, "box car"; spore
former; double zone of beta hemolysis; lecithinase positive; reverse CAMP positive; gas
gangrene.
Answer: Clostridium perfringens
10. Name the anaerobic GNC (gram-negative cocci).
Answer: Veillonella
11. Which organism causes rat bite fever and is NOT culturable?
Answer: Spirillum minus
12. Which organism or group is described by the following? GN coccobacilli; co-infections
with Actinomyces israelii; star-shaped colonies; may pit/corrode the agar.
Answer: Aggregatibacter actinomycetemcomitans
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, 13. Which organism or group is described by the following? GN coccobacilli; hospital-
acquired infections; oxidase negative; nitrate negative.
Answer: Acinetobacter baumannii
14. What causes Q fever?
Answer: Coxiella burnetii
15. Which organism causes gas gangrene?
Answer: Clostridium perfringens
16. Which organism or group is described by the following? GN spirochete; transmitted by
lice; relapsing fever.
Answer: Borrelia recurrentis
17. Which organism or group is described by the following? Curved GNR with "seagull
wings"; grows on Campy BAP or Skirrow agar; darting motility; oxidase positive;
catalase positive.
Answer: Campylobacter species
18. Which organism causes pneumonia that is diagnosed serologically and affects kids and
young adults?
Answer: Chlamydia pneumoniae (C. pneumo)
19. What causes primary atypical pneumonia?
Answer: Mycoplasma pneumoniae
20. Which organism or group is described by the following? Small GNR (coccobacilli) with
bipolar staining; cat bites and scratches (NOT cat scratch fever).
Answer: Pasteurella multocida
21. Which organism or group is described by the following? GN coccobacilli; cause of
whooping cough; "mercury drop" colonies on Regan-Lowe or Bordet-Gengou.
Answer: Bordetella pertussis
22. Which media is used for Bordetella pertussis?
Answer: Bordet-Gengou or Regan-Lowe
23. Which organism or group is described by the following? Inhalation (from soil); Q fever.
Answer: Coxiella burnetii
24. Which organism or group is described by the following? GNR, long and fusiform with
pointed ends; "bread crumbs" or "ground glass" colonies on BAP; R to vancomycin; S
to kanamycin, colistin and bile.
Answer: Fusobacterium nucleatum
25. Which organism causes rat bite fever and appears as "fluff balls"?
Answer: Streptobacillus moniliformis
26. Which organism or group is described by the following? GPR; nerve toxin,
neuroparalytic.
Answer: Clostridium botulinum
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