A woman’s blood-curdling screams as a venomous snake fell from a waterfall directly onto her has been caught in a chilling video.

Doctor Dieynne Saugo was swimming in the picturesque pool under the Serra Azul Waterfall in Cuiaba, Brazil when disaster struck.

In a video taken of another tourist, she can be heard screaming in agony as the snakes attacks.

The terrified doctor is seen desperately trying to reach the shore in the background of the clip and the noise forces the woman being filmed to turn around.

The snake had plummeted down the waterfall, dragged by the current, and hit Saugo just below.

Doctor Dieynne Saugo's screams have been caught on camera
Doctor Dieynne Saugo's screams have been caught on camera

Dieyenne was taken to the Municipal Hospital of Cuiaba (HMC) to receive an antidote to the snake poison before being transferred to the private hospital.

The patient's family wrote on social media: “People who are concerned about my sister's situation, she is in the ICU, but she is in a stable state, thank God.

“She has two bites, it is swollen where it bit, which is normal in the situation that happened, but it has already disinfected a lot.

The doctor suffered two snake bites
The doctor suffered two snake bites

“Thank you for the messages and support, I just ask for prayers to get through this soon, and I know that everything will be okay, because whoever is in charge, is bigger than everything.”

The snake is believed to be a Bothrops jararaca, a species of highly venomous pit viper endemic in South America.

An article in digital journal animaldiversity.org explained a bite from such snake could be fatal.

A bite from the snake can kill humans
A bite from the snake can kill humans

“The toxins present in their (jararaca) venom cause swelling at the envenomation site, necrosis, blistering, hemorrhagic blebs, systemic bleeding into the skin, gums, and nose, and subconjunctival haemorrhage,” they said.

“Collectively, these effects can lead to death due to shock, renal failure, and intracranial haemorrhage, compounded by severe hypotension.”

More specifically, the fatality rate in humans without treatment is 7% compared to 0.7% with it.