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30

1. Acute disease
2. Chronic disease
3. Subacute disease
4. Latent disease

Severity or duration of a disease

31

Symptoms develop rapidly but last only a short time (influenza)

Acute disease

32

Disease develops slowly but body's reaction maybe less severe but the disease is likely to be continual or recurrent for long period (TB, hep B)

Chronic disease

33

Symptoms between acute and chronic

Subacute disease

34

Disease with a period of no symptoms when causative agent is inactive for a short time, but then becomes active to produce symptoms of the disease (shingles)

Latent disease

35

Pathogens limited to a small area of the body

Local infection

36

Infection in which microbes or their products are spread throughout the body (generalized infection) by blood or lymph

Systemic infection

37

Systemic infection that began as a local infection and spread to other specific body parts where they are confined to specific areas of the body(infection starting from teeth)

Focal infection

38

Bacteria in the blood

Bacteremia

39

Growth of bacteria in the blood causing systemic infection
Blood poising

Septicemia

40

Toxins in the blood
Tetanus

Toxemia

41

Viruses in the blood

Viremia

42

Acute infection that causes the initial illness

Primary infection

43

Opportunistic infection after a primary infection

Secondary infection

44

No noticeable signs or symptoms (inapparent infection)

Subclinical infection

45

The time interval between the initial infection and the first appearance of any signs or symptoms

Incubation period

46

1. Type of microorganism
2. Virulence of that microorganism
3. Number of infecting microorganism
4. The resistance of the host

Stages of disease

47

After period of incubation, this period is characterized by early, mild symptoms of disease such as general aches and malaise

Prodromal period

48

Disease is most severe during this period. Number of white blood cells may increase or decrease. If the disease is overcome the patient dues during this period

Period of illness

49

The signs and symptoms subside during this period but the patient is vulnerable to secondary infection

Period of decline

50

The person regains strength and body returns to its predisease state, recovery has occurred

Period of convalesce

51

1. Human
2. Animal
3. Nonliving

Reservoirs of infection

52

AIDS, gonorrhea
Carries may have inapparent infections of latent disease

Human

53

Rabies, Lyme disease
Some zoonoses may be transmitted to humans

Animal

54

Botulism, tetanus
Soil
Water

Nonliving

55

Disease that primarily occur in a wild animal or domestic animal

Zoonoses

56

Number of deaths from a disease/total population in a given time

Mortality rate

57

Number of people affected/total population in a given time period

Morbidity rate

58

Deaths from modifiable diseases

Mortality

59

Incidence of a specific notifiable disease

Morbidity