Microbiology Flashcards
Exam awnsers
A Wood’s lamp can be used to detect what condition in the dog?
Ringworm
What color do Gram-negative bacteria appear after a gram stain?
Red and pink in color
For determining whether an organism has and is able to use flagella.
Motility media
This media is used for the primary isolation of organisms and for subculture of organisms.
Blood agar plate
An oxidase-negative member of the family Enterobacteriaceae and a cause of opportunistic infections of the urine and wounds.
Escherichia coli
Some important pathogens and GI-indigenous flora are Gram-negative anaerobic rods. Which of the following organisms is not a Gram-negative anaerobic rod?
Clostridium spp.
Which of the following organisms is not an obligate intracellular organism?
Mycoplasma
The media used to culture dermatophytes are
DTM and Sabouraud dextrose agar
The pathogenic yeast that is a common cause of otitis externa is
Malassezia pachydermatis
Which agar is both selective and differential?
MacConkey
Which type of agar is most commonly used for antimicrobial susceptibility testing?
Mueller-hinton agar
Staphylococcus gram stains positive. What shape do we see?
Cocci ( in pairs or clusters)
What are the two stains used in the Gram stain procedure?
Crystal violet and safranin
What is the most common cause of diagnostic failure when collecting microbiological specimens?
Contamination
What color do Gram-Positive bacteria appear after a gram stain?
Purple and blue in color
