Health-Related Terminology
- Acute: Having a short or relatively severe course
- Carrier: Apparently health animal that harbors disease organism and is capable of transmitting them to other animals
- Chronic: Of long duration
- Contagious: Infectious disease that may be transmitted from one individual to another
- Diagnosis: Art of distinguishing one disease from another
- Disease: Any departure form normal state of health
- Infectious: Capable of causing disease
- Immunity: Ability to resist infections from normal exposure to disease agents
- Active immunity: Acquired by recovery from the disease or by vaccination
- Passive immunity: Achieved by passing of antibodies from the hen to the chick through the egg
- Lesion: Abnormality of some aspect of an organ or tissue (usually size, shape, color or structure)
- Morbidity: Incidence of a disease in a flock
- Mortality: Death rate; % of individuals that die
- Prevention: Not letting the disease occur
- Sign: Evidence of a disease
- Symptom: Subjective evidence of the disease being present
- Treatment: Promoting recovery or preventing the spread of the disease once it has occurred
- Vector: Mechanical transmission of a disease
