PMC8286628_01
The patient's right hand was bitten by Boiruna maculata. While feeding and rearing this southern mussurana, the patient's hand was mistaken for food and was bitten by the snake (left). The snake was biting the base of the thumb and the pain was slight. The circled dashed line is the snake's left-eye and the arrow is the tip of the snake's nose (right).
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The patient photographed the bite without immediately pulling his hand back (Fig. 1).
Fang marks (arrow) and subcutaneous bleeding were observed at the distal aspect of the right thumb swelling and blister formation was noted (left). Approximately 20 h after the bite, the swelling of the right forearm had extended to the upper arm, redness was present along the lymph vessels, and the axillary lymph nodes were swollen (right).
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The affected limb showed extensive swelling and redness from the fingers to the upper arm and extending over the elbow joint (Fig. 2).