Gripping the deadly snake behind its jaws, Fabiola de Souza massaged its venom glands to squeeze out drops that would save lives across Brazil, where thousands of people are bitten every year.
De Souza and her colleagues at the Instituto Butantan in Sao Paulo harvest the toxin from hundreds of snakes kept in captivity to produce antivenom, which is distributed by the Brazilian Ministry of Health to medical facilities nationwide.
Dozens of poisonous snake species, including the jararaca, thrive in Brazil’s hot and humid climate.
Photo: AFP
Nearly 29,000 people were bitten last year and more than 100 died, official figures showed.
States with the highest rates of snakebite were in the vast and remote Amazon basin, where it can take hours to reach a hospital stocked with antivenom.
Venom is extracted from each snake once a month in a delicate and potentially dangerous process.
Using a hooked stick, De Souza carefully lifted one of the slithering creatures out of its plastic box and maneuvered it into a drum of carbon dioxide. Within minutes, the reptile was asleep.
“It’s less stress for the animal,” De Souza said.
The snake was then placed on a stainless steel bench in the room, where the temperature hovers at about 27°C. De Souza had a few minutes to safely extract the venom before the snake began to stir.
“It’s important to have fear, because when people have fear they are careful,” she said.
The snakes are fed a diet of rats and mice that are raised at the leafy institute and killed before being served up once a month.
After milking the snake, De Souza recorded its weight and length before placing it back in its container.
The antivenom is made by injecting small amounts of the poison into horses — kept by Butantan on a farm — to trigger an immune response that produces toxin-attacking antibodies.
Blood is later extracted from the hoofed animals and the antibodies harvested to create a serum that can be administered to snakebite victims, who might otherwise die.
Butantan project manager Fan Hui-wen said that the institute makes all of the country’s antivenom — about 250,000 10ml to 15ml vials per year.
Brazil also donates small quantities of antivenom to several countries in Latin America. There are now plans to sell the life-saving serum abroad to help relieve a global shortage, particularly in Africa.
About 5.4 million people are estimated to be bitten by snakes every year, WHO data showed.
Between 81,000 and 138,000 die, while many more suffer amputations and other permanent disabilities as a result of the toxin.
To cut the number of deaths and injuries, the WHO earlier this year unveiled a plan that includes boosting production of quality antivenoms.
Brazil is part of the strategy. It could begin to export antivenom as early as next year, Fan said.
“There is interest for Butantan to also supply other countries due to the global crisis of antivenom production,” she said.
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