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→Drug Residues
###Chlorinated Hydrocarbons<br>DDT (Dichloro-Diphenyl-Trichloroethane) is th most well known. It is very durable, accumulates in tissues & persists in the environment. Chlorinated Hydrocarbons are CNS stimulants & cause congestion of internal organs & focal centrilobular necrosis of the liver.
###Chlorinated Hydrocarbons<br>DDT (Dichloro-Diphenyl-Trichloroethane) is th most well known. It is very durable, accumulates in tissues & persists in the environment. Chlorinated Hydrocarbons are CNS stimulants & cause congestion of internal organs & focal centrilobular necrosis of the liver.
###Organophosphates<br>The most widely used insecticides, are much less persistant in the environment & body tissues than Chlorinated Hydrocarbons and hence, present less of a risk. They can however, be extremely toxic to mammals causing non-specific acute signs or chronic lung congestion. They may be an Occupational Hazard.
###Organophosphates<br>The most widely used insecticides, are much less persistant in the environment & body tissues than Chlorinated Hydrocarbons and hence, present less of a risk. They can however, be extremely toxic to mammals causing non-specific acute signs or chronic lung congestion. They may be an Occupational Hazard.
##Herbicides-Are not usually used on animal food crops but may sometimes be used for plants used for animal bedding causing residue problems. Some may contain [[Dioxins]]
##Herbicides-Are not usually used on animal food crops but may sometimes be used for plants used for animal bedding causing residue problems. Some may contain [[Dioxins]].
##Fungicides-(e.g. dicloran & folpet) Do not usually cause residue problems. They may contain heavy metals. They are often dyed to allow identification of treated crops, however, accidental feeding of treated crops to animals or use in cereal foods has led to poisonings.
##Fertilizers-Can cause significant environmental problems, particularly if they contaminate run-off waters. Algal blooms may result aswell as the growth of toxic algae that may contaminate shellfish.
# Growth Promoters
# Growth Promoters