Jararaca

Most recognized pit viper in Brazil and a major medical species.

GenusBothrops

RegionSouth AmericaSouthern South America

Photo: João D'Andretta · Source: Wikimedia Commons · License: CC BY 4.0

Jararaca

Photo: João D'Andretta · Source: Wikimedia Commons · License: CC BY 4.0

Jararaca

Danger Score

Final Danger Score

Venom Core

Lethality weighted 55% (potency × yield). Clinical weighted 45% (real-world CFR).

0.55 × 29 + 0.45 × 4335.3

Modifiers

Multiplicative scalers - amplify or reduce existing danger, can't create it from nothing.

× Speed (1.01)35.7

× Delivery (1.00)35.7

× Encounter (0.96)34.2

Speed = antivenom window. Delivery = fang efficiency. Encounter = exposure × temperament.

Score34

Type

NeurotoxicAffects the nervous system; disrupts nerve-muscle communication and can cause paralysis or respiratory failure.

Venom Yield

Low

Venom Speed

Quick

Delivery Method

Hinged front fangs

Potency (SC Equivalent)

3.600mg/kg LD50

Max Dry Yield

25mg dry

Fatality (Untreated)

3-8%

WHO Importance

Cat. 1

Local Effects

Pain at bite site

Neurological

Paralysis

Gastrointestinal

Nausea or vomiting

Causes of Death

Respiratory failure