UAMS Micro exam 3 Questions and Answers
(100% Correct Answers) Already Graded A+
What type of reaction is expected when Pseudomonas
aeruginosa is inoculated to OF glucose media? [ Ans: ]
Yellow in open tube
blue-green in closed tube (oil)
Which organism pits the agar? [ Ans: ] Eikenella corrodens
What is the method of choice for detecting Chlamydia
trachomatis in adults? [ Ans: ] NAAT
What is the appearance of nonfermenters on MAC/EMB? [
Ans: ] Lactose negative - colorless
Vibrio is usually transmitted through contaminated
________ & _________. [ Ans: ] Water & seafood
What is the Gram stain result for Actinomyces? [ Ans: ]
Gram positive branching rods
What type of specimens are acceptable for anaerobic
cultures? [ Ans: ] Aspirates & tissues; swabs are least
desirable
Which organism appears green on TSA and why? [ Ans: ]
Pseudomonas aeruginosa produces pyocyanin
,Which organism is associated with lice? [ Ans: ] Borrelia
recurrentis
What is the method of choice for detecting Bordetella &
Ehrlichia/Anaplasma? [ Ans: ] PCR
What type of nitrate reaction is produced by Pseudomonas
aeruginosa? [ Ans: ] Positive; no color change after
addition of zinc (nitrate to nitrogen gas)
Name the STD caused by Chlamydia trachomatis that
produces a regional lymphadenopathy (hint: the disease is
rarely seen in the U.S.). [ Ans: ] Lymphogranuloma
venereum
Although Actinobacillus actinomycetemcomitans is an
aerobic organism, it is often found in association with an
anerobic organism. What is that MO? [ Ans: ] Actinomyces
israelii
Which organism is found in animal urine? [ Ans: ]
Leptospira
What is the medium used to isolate Legionella? [ Ans: ]
BCYE
Name the diseases caused by Chlamydia trachomatis that
effect newborns. [ Ans: ] Inclusion conjunctivitis &
neonatal pneumonia
, What two methods are used to detect Chlamydia
trachomatis in shell vials? [ Ans: ] Iodine stain for
glycogen inclusion or DFA
Name two nonfermentors that are oxidase negative. [ Ans:
] Acinetobacter & Stenotrophomonas
What organisms are used to perform the reverse CAMP
test? [ Ans: ] Known Gp B strep & suspected Clostridium
perfringens isolate
Which organism causes human granulocyte anaplasmosis?
[ Ans: ] Anaplasma phagocytophilum
Which organism causes antibiotic associated diarrhea &
pesudomembranous colitis? [ Ans: ] Clostridium difficile
What is the Gram stain result for Vibro? [ Ans: ] Gram
negative rods; some may be curved
What is the Gram stain result for the nonfermenters? [
Ans: ] Gram negative bacilli
Which organisms are associated with ticks? [ Ans: ]
Rickettsia, Ehrlichia, Anaplasma, & Borrelia burgdorferi
Burkholderia, Moraxella, Kingella, & Eikenella are all
oxidase positive. Name other organisms that are oxidase
positive. [ Ans: ] Vibrio, Campy/Helico, Aeromonas, &
Plesiomonas (also Pseudomonas)
(100% Correct Answers) Already Graded A+
What type of reaction is expected when Pseudomonas
aeruginosa is inoculated to OF glucose media? [ Ans: ]
Yellow in open tube
blue-green in closed tube (oil)
Which organism pits the agar? [ Ans: ] Eikenella corrodens
What is the method of choice for detecting Chlamydia
trachomatis in adults? [ Ans: ] NAAT
What is the appearance of nonfermenters on MAC/EMB? [
Ans: ] Lactose negative - colorless
Vibrio is usually transmitted through contaminated
________ & _________. [ Ans: ] Water & seafood
What is the Gram stain result for Actinomyces? [ Ans: ]
Gram positive branching rods
What type of specimens are acceptable for anaerobic
cultures? [ Ans: ] Aspirates & tissues; swabs are least
desirable
Which organism appears green on TSA and why? [ Ans: ]
Pseudomonas aeruginosa produces pyocyanin
,Which organism is associated with lice? [ Ans: ] Borrelia
recurrentis
What is the method of choice for detecting Bordetella &
Ehrlichia/Anaplasma? [ Ans: ] PCR
What type of nitrate reaction is produced by Pseudomonas
aeruginosa? [ Ans: ] Positive; no color change after
addition of zinc (nitrate to nitrogen gas)
Name the STD caused by Chlamydia trachomatis that
produces a regional lymphadenopathy (hint: the disease is
rarely seen in the U.S.). [ Ans: ] Lymphogranuloma
venereum
Although Actinobacillus actinomycetemcomitans is an
aerobic organism, it is often found in association with an
anerobic organism. What is that MO? [ Ans: ] Actinomyces
israelii
Which organism is found in animal urine? [ Ans: ]
Leptospira
What is the medium used to isolate Legionella? [ Ans: ]
BCYE
Name the diseases caused by Chlamydia trachomatis that
effect newborns. [ Ans: ] Inclusion conjunctivitis &
neonatal pneumonia
, What two methods are used to detect Chlamydia
trachomatis in shell vials? [ Ans: ] Iodine stain for
glycogen inclusion or DFA
Name two nonfermentors that are oxidase negative. [ Ans:
] Acinetobacter & Stenotrophomonas
What organisms are used to perform the reverse CAMP
test? [ Ans: ] Known Gp B strep & suspected Clostridium
perfringens isolate
Which organism causes human granulocyte anaplasmosis?
[ Ans: ] Anaplasma phagocytophilum
Which organism causes antibiotic associated diarrhea &
pesudomembranous colitis? [ Ans: ] Clostridium difficile
What is the Gram stain result for Vibro? [ Ans: ] Gram
negative rods; some may be curved
What is the Gram stain result for the nonfermenters? [
Ans: ] Gram negative bacilli
Which organisms are associated with ticks? [ Ans: ]
Rickettsia, Ehrlichia, Anaplasma, & Borrelia burgdorferi
Burkholderia, Moraxella, Kingella, & Eikenella are all
oxidase positive. Name other organisms that are oxidase
positive. [ Ans: ] Vibrio, Campy/Helico, Aeromonas, &
Plesiomonas (also Pseudomonas)
