Chapter 13 Agents of Infectious Disease Flashcards Preview

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Flashcards in Chapter 13 Agents of Infectious Disease Deck (79)
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1

A subclinical disease"

has no observable signs

2

What definition is most accurate for the term "disease"?

An altered physiological state in which the function of a tissue, organ, or body system has been impaired.

3

A Gram-positive bacterium has a thin internal cell wall

False

4

A bacteria with cilia has:

hair like structures on the outside of the cell

5

Bacterial virulence is directly proportional to disease severity:

True

6

Bacteria that can grow in low oxygen environments are known by what term?

Microaerophilic

7

Botulism is caused by a bacterial toxin

True

8

What is the term for bacteria staining purplish-blue with Gram-stain?

Gram-postive

9

What is true about all bacteria?

They do not have mitochondria in their cytoplasm

10

All bacteria have a capsule

False

11

What is the term for a bacterium requiring normal atmospheric oxygen concentration to survive?

Aerobic

12

What characteristics generally apply to bacterial spores?

-They are dormant forms of the bacteria
-They may remain viable even after being autoclaved

13

Which type of RNA virus is influenza?

Orthomyxovirus

14

Which type of RNA virus is carried from animal to animal by mosquitoes, ticks, and lice?

Arbovirus

15

In the laboratory, viruses can be grown in cell cultures.

True

16

B virus belongs to which group of viruses?

Herpesviruses

17

Viruses that infect animals are found in the host's cells.

True

18

In which laboratory species is the B virus found?

Macaques

19

A typical virus is made of an envelope containing both DNA and RNA' and proteins.

False

20

Macaques that have contracted the B virus do not shed it until symptoms are observable.

False

21

Serological tests are the most common method used to identify viruses.

True

22

What group of viruses contain DNA?

-Poxviruses
-Parvoviruses
-Herpesviruses
-Rotaviruses

23

Which type of RNA virus is mouse hepatitis virus?

Coronavirus

24

What is TRUE about viruses?

They do not reproduce outside of a host cell.

25

Which decontamination method is the only way to ensure complete destruction of prions?

Incineration

26

Because prions are very difficult to inactivate, very strict husbandry protocols are necessary to prevent their transmission.

True

27

Which species has proven to be a valuable model for encephalopathies caused by prions?

Hamsters

28

Bleach can be used to reduce the level of prion contamination on infected surfaces.

True

29

Ringworm is an example of what?

Cutaneous mycosis

30

What term is used to describe a disease caused by fungi?

Mycosis