Auer Classification of
Systemic Signs and Symptoms of BRS Bites
| Grade |
Characteristics |
| 1 |
Mild local erythema at puncture site |
| 2a |
Necrotic area less than 1 cm in diameter |
| 2b |
Lesion as in 2a accompanied by mild systemic reaction (nausea, fever) |
| 3 |
Necrosis measuring 1-4 cm in diameter accompanied by moderate systemic reaction
(arthralgia, chills, fever, generalized rash, petechiae) |
| 4a |
Necrosis measuring more than 4 cm in diameter accompanied by coagulopathy, severe
hemolysis, and hemoglobinuria |
| 4b |
Findings in 4a, plus renal failure, secondary infections, and shock |
Spider Bites/Vol 103/No 4/ April 1998/Postgraduate Medicine - "When
to worry about spider bites" by Wui-Leong Koh, MD. |
