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Study of disease
Structural and functional changes in body

Pathology

1

Study of the cause of disease

Etiology

2

Development of disease

Pathogensis

3

Ability of a microorganism to cause disease by overcoming the defense of the host

Pathogenicity

4

The degree or extent of pathogenicity

Virulence

5

Colonization of the body by pathogens

Infection

6

An abnormal state in which the body is not functionally normal

Disease

7

Maybe present for days, weeks or months

Transient microbiota

8

Permanently colonize the host

Normal Microbiota

9

Is the relationship between normal microbiota and the host

Symbiosis

10

Nose & throat
Eyes
Mouth
Skin
Large intestine
Urinary & reproductive systems

Locations of normal microbiota

11

Competitive exclusions
Competition between microbes

Microbial antagonism

12

Proteinaceous toxins produced by bacteria to inhibit the growth of similar or closely related bacterial strains

Bacteriocins

13

Are live applied to or ingested into the body, intended to exert a beneficial effect

Probiotics

14

Are used to prove the cause, etiology, of an infectious disease

Koch's postulates

15

1. Same pathogen must be present in every case of the disease
2. The pathogen must be isolated from the diseased host and grown in pure culture
3. Pathogen from pure culture must cause the disease when inn ovulated into healthy animal
4. Pathogen must be isolated from inoculated animal and must be shown to be the original organism

Koch postulates

16

A change in body function that is felt by a patient as a result of disease.

These subjective changes are not apparent to an observer

Symptom

17

Specific group of signs and symptoms that accompany a disease

Syndrome

18

A disease that spread from one host to another either directly or indirectly (genital heroes, TB)

Communicable disease

19

A disease that is easily spread from one host to another by direct contact or by contact with bodily fluids

Contagious disease

20

A disease that is not transmitted from one host to another

Non communicable disease

21

1. Communicable disease
2. Contagious disease
3. Noncomminicable disease

Classifying infectious disease

22

1. Incidence
2. Prevelence
3. Sporadic disease
4. Endemic disease
5. Epidemic disease
6. Pandemic disease
7. Herd immunity

Occurrence of disease

23

Fraction of population that contracts a disease during a specific time

Incidence

24

Fraction of a population having a specific disease at a given time

Prevelence

25

Disease that occurs occasionally in a population

Sporadic disease

26

Disease constantly present in a population

Endemic population

27

Disease acquires by many hosts in a given area in a short time

Epidemic disease

28

Worldwide epidemic

Pandemic disease

29

Immunity in most population

Herd immunity