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These are the WHO recommended definitions of categories of exposure and use of rabies biologicals:
Category III: -single or multiple transdermal bites or scratches, licks on broken skin, contamination of mucous membrane with saliva (i.e. licks) and suspect contacts with bats: use immunoglobulin plus vaccine
Category II: -minor scratches or abrasions without bleeding or and nibbling of uncovered skin: use vaccine alone
Category I : -touching, feeding of animals or licks on intact skin no exposure therefore no prophylaxis if history reliable
References:
http://www.who.int/rabies/PEP_prophylaxis_guidelines_June10.pdf
http://www.who.int/wer/2007/wer8249_50.pdf
Category III: -single or multiple transdermal bites or scratches, licks on broken skin, contamination of mucous membrane with saliva (i.e. licks) and suspect contacts with bats: use immunoglobulin plus vaccine
Category II: -minor scratches or abrasions without bleeding or and nibbling of uncovered skin: use vaccine alone
Category I : -touching, feeding of animals or licks on intact skin no exposure therefore no prophylaxis if history reliable
References:
http://www.who.int/rabies/PEP_prophylaxis_guidelines_June10.pdf
http://www.who.int/wer/2007/wer8249_50.pdf
