Bacteria Basics
A positive oxidase test is most characteristic of:
a. Escherichia coli
b. Klebsiella pneumoniae
c. Pseudomonas aeruginosa
d. Proteus mirabilis
What is Pseudomonas aeruginosa
Foley Catheter Bags are acceptable for routine urine cultures. True/False
False. Foley catheter bags are usually heavily contaminated with usual skin flora.
A germ tube-positive yeast isolated from blood culture is most likely:
What is Candida albicans
Which mycobacterial species is classified as a rapid grower?
a. Mycobacterium tuberculosis
b. Mycobacterium kansasii
c. Mycobacterium avium complex
d. Mycobacterium fortuitum
What is Mycobacterium fortuitum
What protozoa am I?
a. Trichomonas vaginalis
b. Giardia lamblia
c. Chilomastix mesnili
d. None of the above
What is Giardia lamblia
Microorganisms that cannot metabolize sugars in anaerobic conditions:
a. Anaerobic
b. Fermenters
c. Nonfermenters
d. Indole positive
What are nonfermenters
The most common cause of uncomplicated urinary tract infections is:
Who is E. coli
A CSF specimen reveals encapsulated budding yeast on India ink preparation. The organism is:
a. Candida albicans
b. Histoplasma capsulatum
c. Cryptococcus neoformans
d. Blastomyces dermatitidis
What is Cryptococcus neoformans
Which medium is most commonly used for cultivation of mycobacteria?
a. Blood agar
b. MacConkey Agar
c. Lowenstein-Jensen Medium
d. Chocolate Agar
Which is pathogenic?
a. Entamoeba histolytica
b. Entamoeba dispar
c. Entamoeba coli
d. Entamoeba hartmanni
What is Entamoeba histolytica
Which Campylobacter spp. is Cephalothin RR, Nalidixic Acid SS, Hip +?
a. C. coli
b. C. jejuni
c. C. fetus
d. H. pylori
What is C. jejuni
A urine culture yielding three organisms in low colony counts is most often reported as:
a. Significant bacteriuria
b. Mixed flora/contamination
c. Positive blood culture
d. Pure culture
What is Mixed flora/contamination
Which fungal structure is commonly used for identification of dermatophytes?
a. Capsule size
b. Germ tube formation
c. Macroconidia and microconidia
d. Acid-fast staining
What is Macroconidia and microconidia
A mycobacterium produces a yellow-orange pigment only after exposure to light.
a. Nonchromogen
b. Scotochromogen
c. Photochromogen
d. Rapid grower
What is Photochromogen
Pathogenic and fatal. It causes primary amebic meningoencephalitis.
a. Endolimax nana
b. Naegleria flowleri
c. Acanthomoeba spp.
d. None of the above
What is Naegleria fowleri
Which two non-fermenters are oxidase negative?
a. Flavobacteria
b. Acinetobacter
c. Burkholderia cepacia
d. Stenotrophomonas maltophilia
What is Acinetobacter and Stenotrophomonas maltophilia
What is Group B?
Which dermatophyte commonly invades hair, skin, and nails?
a. Candida albicans
b. Cryptococcus neoformans
c. Trichophyton rubrum
d. Histoplasma capsulatum
What is Trichophyton rubrum
All of the following are associated with skin infections except?
a. M. marinum
b. M. haemophilum
c. M. kansasii
d. M. ulcerans
This cyst can have up to 8 nuclei....
a. Entamoeba hartmanni
b. Entamoeba histolytica
c. Entamoeba coli
d. None of the above
Entamoeba coli
A Gram-pos coccus causes infective endocarditis: catalase -, bile esculin neg, no growth in 6.5% NaCl, and alpha.
a. Enterococcus
b. Viridans group
c. Streptococcus pyogenes
d. Non-enterococcus (Group D)
What is Viridans group
A urine isolate is: LF, urease +, mucoid colonies, and non-motile. What is the most likely organism?
a. Enterobacter cloacae
b. Klebsiella pneumoniae
c. Escherichia coli
What is Klebsiella pneumoniae
Which fungus produces broad, ribbon-like, aseptate hyphae?
a. Aspergillus fumigatus
b. Rhizopus spp.
c. Candida albicans
d. Histoplasma capsulatum
What is Rhizopus spp.
Which organism is a photochromogen?
a. M. kansasii
b. M. avium complex
c. M. gordonae
d. M. fortuitum
What is M. kansasii
I am the 2nd most common in the U.S. Larvae can be found in sputum or gastric washings. Who am I?
a. Ascaris lumbroides
b. Strongyloides stercoralis
c. Wuchereria bancrofti
d. Enterobius vermicularis
What is Ascaris lumbroides