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→Factors Involved in the Development of Disease
*#** Clinical therapy and/or
*#** Clinical therapy and/or
*#** Host defence systems
*#** Host defence systems
*# Environment - a. overcrowding of animals
*# '''Environment''', for example:
*#* Overcrowding of animals
harbour the pathogenic agent but which do not show signs of disease) to
*#* Mixing animals from differing origins
*#** Carriers are allowed to infect susceptible animals.
*#*** Carriers are animals which harbour the pathogenic agent but do not show signs of disease.
*#* Changes in management routine
====Types of Agents Causing Disease====
====Types of Agents Causing Disease====