Poultry Diseases

Question 1

Disease may cause noticeable ______ and/or ______ or simply a drop in production

Answer 1

Morbidity

Mortality

Question 2

Causes of disease:

Answer 2

1. Infectious agents and toxins
2. Genetic defects (congenital)
3. Toxicities
4. Nutritional and metabolic disorders
5. Environmental factors

Question 3

Examples of disease toxicities:

Answer 3

Feed additives, medications, etc.

Question 4

Tools for identifying the cause of disease:

Answer 4

1. Vets, extension agents, etc
2. Feed analysis, reviewing management practices
3. Necropsy
4. Blood and egg tests
5. Cloacal/tracheal swabbing
6. Sentinel birds

Question 5

Types of infectious agents:

Answer 5

1. Viruses
2. Bacteria
3. Protozoa
4. Metazoa
5. Fungi

Question 6

Some infectious agents produce ______ which also have negative effects and cause disease

Answer 6

Toxins

Question 7

Diseases are multifactorial: severity and effects involve the interaction of the ______, ______, and ______.

Answer 7

Host
Agent
Environment

Question 8

Define disease

Answer 8

Any abnormality (in a host) that results in the alteration of normal function

Question 9

host factors:

Answer 9

age, gender, breed, strain, line, etc

Question 10

agent factors:

Answer 10

number, type, virulence, immune status of the host, point of entry

Question 11

______ pathogen: present in animal or environment until immune system is weakened for some reason

Answer 11

oportunistic

Question 12

______ pathogen: not normally present and usually cause disease

Answer 12

obligate

Question 13

environment factors:

Answer 13

management, stress, stocking densities

Question 14

define infectious disease:

Answer 14

a disease caused by an infectious agent

Question 15

define infectivity:

Answer 15

the ability of an agent to invade and replicate in an organism