Micro Lab - Exam 2
staphylococcus aureus produces ____ that coagulates plasma
coagulase
what is the inflammation in the urinary bladder?
cystitis
staphylococci are
facultative anaerobes
staphylococci are ____ irregular cluster like grapes
gram-positive cocci
you cultured e coli in a phenol red glucose broth overnight. The color of phenol red changed from red to yellow. What does it mean?
E. coli fermented glucose
after culture of bacteria, the red color of urea broth that contains phenol red indicates that urease produced by the bacteria converted urea into ____. what is the name of molecule in the blank?
ammonia
what enzyme hydrolyzes starch?
amylase
the presence of bacteria in voided urine is __
bacteriuria
staphylococcus aureus is
beta-hemolytic
which one of the UTI is more common?
cystitis
in addition to basic nutrients, ________ media contain one or more components, such as a particular carbohydrate, that can be used by some microorganisms but not by others. if the microorganism uses the component during the incubation period, a change occurs in an indicator that is also included in the medium, which results in a color change in the medium
differential
which of the following is the most frequent cause of UTI?
e coli
staphylococcus aureus produces ____ that destroys blood cells
hemolysins
what is the type of UTI that generally begins in your urethra or bladder and travels to and multiply in one or both of your kidney?
pyelonephritis
which of the following has the risk of infection in urinary bladder and cystitis?
sampling catherized urine specimens
in addition to basic nutrients, ____ media contain one or more components that suppress the growth of some microorganisms without seriously affecting the ability of others to grow
selective
you inoculated 0.01 ml of clean-catch voided urine sample on a nutrient agar plate, and incubated at 35C over night. Next day, the number of colonies on the plate was 1100. This urine sample has ____ bacteriuria.
significant
which of the following is the major cause of nosocomial infections?
staphylococcus aureus
which of the following is implicated in acute urinary tract infections in women between 16-25?
staphylococcus saprophytic
what is not true about normal flora?
the microbial normal flora doesn't change with age, human activity, and environmental influences
T/F: any microorganism is potentially pathogenic if it enters a susceptible host
true
indole test examines the presence of the enzyme ____ in bacteria. what is the name of the enzyme in the blank?
tryptophanase
staphylococcus epidermidis and staphylococcus saprophyticus don't cause serious infections because they don't produce _____ factors such as hemolysins, coagulase, leukocidin
virulence
which of the following has the probability of contamination by urogenital flora during sampling procedure?
voided urine sampling
