exam 4

describe the appearance of a spore within a GPR

which 2 genuses are associated with the development of rods

what is the significance of performing a culture test when working with Bacillus spp

which dye can be used to enhance spore visualization

which dye is used to visualize capsules in Bacillus spp.

which test result/chracteristic can differentiate Bacillus spp. from Clostridium spp.

which organism fits the following?
- non motile
- no PEA growth
- Lecithinase positive
- no MSA growth/fermentation
- larger ZOI with penicillin

which organism results in the formation of clinically significant, encapsulated chains of 2-4 cells in blood or CSF

in which conditions will spores form?

which organism is non hemolytic, shows no growth on CNA/MAC/PEA, and can resemble a medusa head?

which disease states can result form B. anthracis infection (choose all that apply)

what is the black, necrotic lesion associated with anthrax called?

which two factors, when produced together, are fatal in B. anthracis infections

T/F - the presence of just one toxin produced by B. anthracis can be fatal

which species is most associated with sporadic food poisoning outbreaks?

which of the following are microbial defense mechanisms of B. cereus?

which syndromes/menifestations are associated with B. cereus? (choose all that apply)

T/F - Bacillus spp. are generally beta hemolytic, but B. anthracis is not

the following is associated with which genus?
- diphtheroids
- may form stacking patterns like a fence microscopically
- resembles Chinese lettering
- often seen with PMNs

which genus fits the following profile
- catalase positive
- motility negative
- nitrate positive
- urea positive
- esculin negative
- gelatin liquefaction

T/F - only toxigenic strains of Corynebacterium diphtheriae cause disease

how can you microscopocally ID C. diphtheriae

which of the following is NOT a type of media that can be used to grow C. diphtheriae

describe the appearance of C. diphtheriae on Tinsdale media

why is Loeffler's medium useful for C. diphtheriae

what gene within the infective organism is responsible for pharyngeal diphtheriae

which organism can cause gray/white pseudomembranes to develop as a result of toxin secretion from epithelial cells

which organism can release toxins that cause damage to the kidneys, heart, and nervous system, and eventually lead to paralysis

which Corynebacterium strains can cause pharyngeal diphtheria

which Corynebacterium species are associated with unpasteurized dairy or contact with animals

what causes C. jeikeium colonies to appear pin-point upon isolation

how can you rule out C. resistens

which is the most common diphtheroid isolate

which groups are at the highest risk for contracting C. jeikeium

which crystals are associated with a C. urealyticum infection

how can you increase the chances of isolating C. urealyticum from a urine sample

which organism exhibits tumbling motility and yields an umbrella shape in solid agar at room temp

at what temp does Listeria monocytogenes yield an umbrella shape in solid agar

which organism may resemble group B strep and react with group B/G antisera

describe the key biochem reactions of L. monocytogenes

what is the most common method of contracting Listeria monocytogenes

Listeria monocytogenes is:

which organism yields flu-like symptoms in pregnant women, cross the placenta once she becomes septic, and result in premature birth, stillbirth, or spontaneous abortion

how can you differentiate Arcanobacterium pyogenes/haemolyticum from Arcanobacterium bernardiae on a plate

how can you differentiate A. haemolyticum from A. pyogenesernardiae

what is the clinical significance of Arcanobacterium haemolyticum

what is the clinical significance of Arcanobacterium pyogenes

what is the clinical significance of Arcanobacterium bernardiae

what is the main reservoir of Erysipelothrix rhusiopathiae

which organism is H2S positive along the stab line only

which organism is associated with the formation of an erysipeloid (diamond shaped rash on the hands or fingers 2-7 days after exposure)

best growth media for Gardneralla vaginalis

which organism fits the following
- starch hydrolysis pos
- hippurate hydrolysis pos
- beta glucosidase neg
- alpha glucosidase pos

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