Taking the sting out of spider venom
7 August 2013 Last updated at 09:06 BST
Brown recluse spiders bite more than 7,000 people in Brazil every year, causing serious skin lesions and even death.
Luckily, a life-saving anti-venom is available, but it comes with its own risks - mostly to the animals involved in the production process.
For Health Check, Ben Tavener reports from Brazil on a new, synthetic venom that could lead to a more humane solution.