Table 1.

Case definition of patients with snakebite envenoming

No envenoming	Patients with no local or systemic signs or symptoms
Mild envenoming	Local oedema in one or two segments, pain at the bite site, absence of systemic signs or symptoms.
Moderate envenoming	Oedema in three segments, local haemorrhage. Systemic symptoms (bleeding, hypotension) and blood clotting test alterations
Severe envenoming	Oedema extending to the whole limb, local haemorrhage with necrosis, severe hypotension, blood clotting alterations, systemic bleeding and, in some cases, acute kidney injury.