| Question | Answer |
| Which are not considered microorganisms?
Bacteria
Fungi
Rickettsiae
All are correct | All are correct |
| The physician would order a stool culture to confirm staphylococcal food poisoning. t/f | f |
| Diagnosis of a helminth infection requires a:
stool sample for culture on differential media.
stool sample for ova and parasite examination.
skin biopsy specimen for fluorescent testing.
blood sample for tissue culture. | stool sample for ova and parasite examination. |
| Malaria is diagnosed from a stained blood sample that is examined under the microscope for the protozoal parasite. t/f | t |
| Legionnaires’ disease is caused by a Gram-positive bacillus that causes a particular type of pneumonia. t/f | f |
| Negative rapid strep test results must be confirmed with a throat culture, because the rapid strep test is highly specific but not highly sensitive. t/f | t |
| Most pathogenic organisms remain viable at temperatures of ____°C.
37°C
0°C
25°C | 37°C |
| A urinary tract infection can be diagnosed if an organism isolated from a CCMS urine specimen is found in pure culture and is present in a quantity greater than:
100 cfu/mL of urine.
10,000 cfu/mL of urine.
100,000 cfu/mL of urine. | 100,000 cfu/mL of urine. |
| Which of the following infections is caused by a fungus?
Pneumocystis pneumonia
Pyloric ulcers
Rocky Mountain spotted fever
Toxic shock syndrome | Pneumocystis pneumonia |
| Which of the following tests is performed in the serology laboratory?
Direct immunologic urine pregnancy test
Indirect immunologic tests
Strep test
Influenza test | Indirect immunologic tests |
| Tightly coiled, spiral-shaped bacteria are called:
spirilla.
sarcinae.
spirochetes.
streptobacilli. | spirochetes. |
| Mycobacterium tuberculosis is the organism that causes tuberculosis and also is an anaerobe. t/f | f |
| An organism that is unlikely to be transmitted by airborne droplets is:
Streptococcus pneumoniae.
Legionella pneumophila.
Neisseria meningitidis.
Treponema pallidum. | Treponema pallidum. |
| The Gram reaction a bacterium exhibits are the result of its:
cell membrane sugar content.
chemical makeup of the cell wall.
gelatinous capsule.
waxlike cell wall lipids. | chemical makeup of the cell wall. |
| A chlamydia specimen must be transported to the laboratory on ice immediately after collection. t/f | t |
| Fungi are classified as:
prokaryote.
protozoa.
eukaryote.
parasite. | eukaryote. |
| Bacterial endospores allow a microorganism to survive harsh environments. t/f | t |
| When bacteria are found in grapelike clusters, which of the following prefixes is used?
Strepto-
Diplo-
Staphylo-
Tetrads | Staphylo- |
| Specimens should be collected during the acute phase of an illness and 24 hours after antibiotics are prescribed. t/f | f |
| Tinea pedis is a fungal infection of the feet. t/f | t |
| Which of the following CLIA-waived serology tests can be performed by a medical assistant to detect antibodies to a specific pathogen?
Infectious mononucleosis
H. pylori
Lyme disease
HIV
All are correct | All are correct |
| The growth of only one microorganism on a nutrient surface or culture is the definition for which of the following terms or phrases?
Subcultured
Pure culture
Streaked for isolation
Hemolysis | Pure culture |
| The term which means “in glass” or “in the laboratory” because it is not occurring in a living body.
Extracellular
Intracellular
In vivo
In vitro | In vitro |
| Microscopically, a sputum specimen containing positive AFB appears:
pink-red.
baby blue.
purple.
green. | pink-red. |
| Most pathogenic organisms prefer temperatures around 37°C and remain viable for up to 72 hours if held at room temperature or refrigerator temperature. t/f | t |
| An organism that is unlikely to be transmitted by airborne droplets is:
Streptococcus pneumoniae.
Legionella pneumophila.
Neisseria meningitidis.
Treponema pallidum. | Treponema pallidum. |
| The Epstein-Barr virus causes mononucleosis. t/f | t |
| An organism that is unlikely to be transmitted by sexual contact is:
Neisseria gonorrhoeae.
T. pallidum.
Chlamydia trachomatis.
Clostridium botulinum. | Clostridium botulinum. |
| Cultures for gonorrhea should be kept at room temperature. t/f | t |
| Which color indicates Gram-positive bacteria?
Pink
Purple
Blue
Green | Purple |
| Members of a class of invertebrate animals that include insects, crustaceans, and arachnids.
Arthropod
Parasite
Helminth
Bacteria | Arthropod |
| Bacteria are classified as:
prokaryote.
protozoa.
eukaryote.
parasite. | prokaryote. |
| Sensitivity testing is used to determine:
the susceptibility of a microorganism to antiviral treatment.
the patient’s susceptibility to a particular pathogen.
a pathogen’s susceptibility to a particular antibiotic.
All are correct | All are correct |
| Which of the following is true about gonorrhea?
Gram-negative cocci found in pairs
Gram-positive cocci in clusters
Gram-positive cocci in chains
Gram-negative spirilla | Gram-negative cocci found in pairs |
| Mycobacterium tuberculosis is the organism that causes tuberculosis and also is an anaerobe. t/f | f |
| Molecules that are needed for metabolism, examples include carbohydrates, lipids, and proteins.
Yeast
Mordant
Macromolecules
Extract | Macromolecules |
| The rapid detection test that assists in the diagnosis of stomach ulcers detects:
Clostridium perfringens.
E. coli.
Helicobacter pylori.
Streptococcus pyogenes. | Helicobacter pylori. |
| A Gram-positive cell has a thick layer of peptidoglycan with no lipid layer surrounding it. t/f | t |
| Beta hemolysis:
is best detected on a sheep’s blood medium.
is caused by hemolysis of blood cells.
refers to a clear zone around bacterial colonies growing on a sheep’s blood medium.
All are correct | All are correct |
| Specimens should be collected during the acute phase of an illness and 24 hours after antibiotics are prescribed. t/f | f |
| Referring to antimicrobial susceptibility testing, which of the following labels would indicate that the antibiotic is effective against the organism in that particular concentration in vitro?
S
R
I
None are correct | S |
| The microbiology laboratory report for Mrs. Wallace’s urine culture lists eight antibiotics, five of which are followed by the letter “S.” This means that these antibiotics:
should be considered when treating the infection. | should be considered when treating the infection. |
| An organism that is flexible as far as its oxygen requirements are concerned is called a(n):
aerobe.
anaerobe.
facultative aerobe.
facultative anaerobe. | facultative anaerobe. |
| Gram-negative bacteria will stain what color?
Blue/violet
Pinkish-red
Do not stain well with Gram’s stain
Pink | Pinkish-red |
| Which are not considered microorganisms?
Bacteria
Fungi
Rickettsiae
All are correct | All are correct |
| Which of the following will need a blood sample for diagnosis?
Salmonella
Tetanus
Strep throat
All are correct | Tetanus |
| An anaerobic organism is most likely to be isolated from a(n):
abscess.
sputum.
skin scraping.
throat. | abscess. |
| A cellulose tape test for pinworms requires:
a length of cellulose tape to be touched against the anal folds to collect worms and a microscope to view the eggs that have adhered to a length of cellulose tape. | a length of cellulose tape to be touched against the anal folds to collect worms and a microscope to view the eggs that have adhered to a length of cellulose tape. |
| Mycoplasmas have more PG in their cell walls than any other pathogen. t/f | f |
| Microscopically, a Gram-negative bacilli appears as:
purple spheres.
purple rods.
pink (red) spheres.
pink (red) rods. | pink (red) rods. |
