3J last prelim quiz

This susceptibility test reaction is indicated by the absence of a zone of inhibition.

• Susceptible

• Intermediate

• Resistant

Treponema pallidum subsp. pallidum adhesin

• opa protein

• M protein

• Tapered end

Streptococcus mutans adhesin

• M protein

• glycocalyx

• opa protein

Type of toxin that forms part of the bacterial structure

• exotoxin

• endotoxin

• verotoxin

Science that studies when and where diseases occur and how they are transmitted in populations

Enzymes that digest fibrin clots.

• coagulase

• kinase

• lipase

• hyaluronidase

This refers to the lowest concentration of an antimicrobial agent that inhibits visible bacterial growth.

• Minimum inhibitory concentration

• Minimum bactericidal concentration

• Breakpoint

Which of the following events will cause a decrease in the pH of the MH agar?

• presence of divalent bonds

• incubation with carbon dioxide

• too much antibiotic disks on the plate

• incubation in low temperature

Zone width is not related to the thickness of MH agar.

• True

• False

• maybe

The turbidity of the 0.5 MacFarland standard is similar to a bacterial solution with approximately how many bacterial cells?

• 1.5 x 10 ⁵ cells /mL

• 1.8 x10⁵ cells /L

• 1.5 x 10 ⁸ cells /mL

• 1.8 x10⁵ cells /dL