Changes

====Definition and Type====

====Definition and Type====

A definite morbid (illness producing) process having a characteristic train of symptoms or

 

signs: it may affect the whole body or any of its parts and its aetiology, pathology and

* '''Disease''' is  a definite morbid (illness producing) process, having a characteristic train of symptoms or signs.

prognosis may be known or unknown.

** May affect the whole body or any of its parts.

Disease can be divided into two main categories

** The disease's aetiology, pathology and prognosis may be known or unknown.

1. Acute - of sudden onset and short duration

* There are two main categories of disease.

Outcome - a. causes death of the animal, or

*# '''Acute'''

- b. resolves due to host defence response or clinical therapy, or

*#* Characterised by sudden onset and short duration.

- c. becomes chronic disease

*#* The outcome of acute disease may be:

2. Chronic - of insidious onset and protracted course

Outcome - a. progressively destroys tissue compromising its function and endangering life,

*#** Resolution due to host defence response or clinical therapy

*#** Progression to chronic disease

- b. its course is halted and the tissue repairs by scarring

*# '''Chronic'''

*#* Characterised by insidious onset and protracted course.

*#** Progressive destruction of tissue

*#*** Compromises funtion and endangers life,

*#** The halting of the course of disease, with tissue repair by scarring.

 

====Factors Involved in the Development of Disease====

====Factors Involved in the Development of Disease====

====Types of Agents Causing Disease====

====Types of Agents Causing Disease====