Erik
If I may explain. Polivin anti serum is made as fopllows. Small quantities of snake venom are injected in horses. The dosis is slowly made bigger. The horse will build up an imunity against the poison. The horse's blood is drawn and the anti bodies are used to counter the snakes venom. horses are injacted with venom mix consisting of the venom of the following snakes:Puffadder,Gaboen adder, Black mamba, Green mamba,Jameson's adder, Rinkhals, Bush cobra, Koperkapel, Egypsian cobra and the mozambique cobra. The anti venom produced will be effective for all the above snakes.

General advise on snake bites

If you are less than 2 hours from medical facilities do not administer anti venom.

General treatment
Identify the snake
Do not cut over the bite or try to suck out the venom
Apply a pressure bandage above the wound
Keep the pasient calm still and in the shade. Movements helps to spread the venom.
Administer an anti allergic substance like Phenergan
Get the pasient to a doctor as soon as possible, try to take the snake with( dead)

Spesific treatment
Neurotoxic snakes
Black mamba,Green mamba, Rinkhals and all cobras
Use pressure bandage above the wound release it every half hour for 1-2 minutes
If medical help is more than 2 hours away administer 2 ampules of anti venom in the butt mussle.
Transport to hospital.
Check the patient's breating and apply mouth to mouth breathing if needed

Sitotxic
Puff adder and Gaboen adder
No pressure bandage
Ifmore than 2 hours away from medical facility administer 2 ampules of anti venom
Give the strongest available pain killers to the patient.
Get the patient to the hospital

Hematoxic
Tree snake and bird snake
No pressure bandage and no anti venom.
Get to a hospital as quickly as possible. If posstively identified doctors can order anti venom for tree snakes ussually a blood transfusion will be done.

There is no anti venom for bird snakes, doctors will treat the symptoms

The rest
Mountain adder
No presure bandage or anti venom, doctor will treat symptoms

The rest of the sligktly poisonness snakes needs medical attention but the are not deadly

Non poisoness snakes only needs treatment against infection and pain.

Thats my bit I hope I could help a bit. I've just gave basic guide lines on snake bites. A good knowledge of snakes are advisable.