HCMA 111 Ch 49

Which of the following cfu results would indicate a UTI is likely?

100,000 cfu/mL of urine

Most pathogenic organisms remain viable at temperatures of ____°C. Group of answer choices

37°C

What is a substance that inhibits the growth of microorganisms in living tissue?

Antiseptic

The causative agent for Lyme disease is

Borrelia burgdorferi

Mycobacterium tuberculosis is the organism that causes tuberculosis and also is an anaerobe.

False (aerobe)

The rapid detection test that assists in the diagnosis of stomach ulcers detects:

Helicobacter pylori.

The term which means "in glass" or "in the laboratory" because it is not occurring in a living body.

In vitro

Gram-negative bacteria will stain what color?

Pinkish-red

Scarlet fever, rheumatic fever, and glomerulonephritits are all possible complications of an infection with what bacteria?

Streptococcus pyogenes

A stool for O&P is used to diagnose both amoebic dysentery and giardiasis.

True

Cultures for gonorrhea should be kept at room temperature.

True

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.

Which are not considered microorganisms?

all are correct

Which of the following pathogenic organisms can be identified in sputum samples?

all are correct: pathogenic fungi, bacteria and mycoplasma.

HIV is a

all of these: bloodborne pathogen, viral infection, condition that is treated with ARV medications

If an organism is able to live and thrive in the presence of oxygen, it is

an aerobe

If a bacterium is rod-shaped, it is described as

bacilli

An organism that is flexible as far as its oxygen requirements are concerned is called a(n):

facultative anaerobe.

Legionnaires' disease is caused by a Gram-positive bacillus that causes a particular type of pneumonia.

false (gram-negative)

The physician would order a stool culture to confirm staphylococcal food poisoning.

false (organism not found in stool, but in food)

Mycoplasmas have more PG in their cell walls than any other pathogen.

false; (no PG in their cell walls)

Specimens should be collected during the acute phase of an illness and 24 hours after antibiotics are prescribed.

false; (should be collected before antibiotics are prescribed)

A disease-causing organism or agent is the definition for which term?

pathogen

Bacteria are classified as:

prokaryote.

What color is a Gram-positive organism?

purple

Which color indicates Gram-positive bacteria?

purple

Tiny Gram-negative bacteria that are transmitted by blood-sucking insects are called

rickettsia

Beneficial microorganisms that are responsible for breaking down organic matter are called

saprophyte

In the scientific name Escherichia coli, the name coli indicates the:

species.

Tightly coiled, spiral-shaped bacteria are called:

spirochetes.

A Gram-positive cell has a thick layer of peptidoglycan with no lipid layer surrounding it.

true

A chlamydia specimen must be transported to the laboratory on ice immediately after collection.

true

Bacterial endospores allow a microorganism to survive harsh environments.

true

Malaria is diagnosed from a stained blood sample that is examined under the microscope for the protozoal parasite.

true

Most pathogenic organisms prefer temperatures around 37°C and remain viable for up to 72 hours if held at room temperature or refrigerator temperature.

true

Negative rapid strep test results must be confirmed with a throat culture, because the rapid strep test is highly specific but not highly sensitive.

true

Tetanus is caused by a spore-forming, anaerobic bacillus that is most likely to be seen in deep wounds.

true

The Epstein-Barr virus causes mononucleosis.

true

Tinea pedis is a fungal infection of the feet.

true

Molecules that are needed for metabolism, examples include carbohydrates, lipids, and proteins.

macromolecules