TV presenter Charlie Webster has been able to speak to her family after being brought out of her medically induced coma earlier on Thursday, her manager said.
The 33-year-old Team GB ambassador remains in intensive care in a hospital in Rio de Janeiro after contracting a rare strain of malaria during a 3,000-mile charity cycle ride to the Brazilian city.
She is being kept on dialysis as her kidneys are not responding to treatment and is being supported by a respirator, but doctors said they are "very happy with Charlie's neurological results" after performing a number of cognitive tests.
Her mother said in a statement that she had been able to speak to her family.
She said: "Charlotte knows she nearly died. She mouthed to me earlier, 'look at all the machines keeping me alive'.
"Charlotte is really strong but as the doctors keep reminding me, everyone heals differently. I am just so thankful that she's able to communicate with us again.
"It's been the worst imaginable time - we have been beside ourselves with worry but the fact Charlotte is now conscious is amazing.
"Knowing Charlotte, the thing she'll be most annoyed about is that she's missed the Olympics.
"She will be especially gutted not to have seen Nicola Adams fight today - there's a TV on the wall, so hopefully she can at least watch the women's boxing final."
The former Sky and ITV sports presenter has been unconscious since August 11 and was placed into a coma the next day after becoming unwell while watching the opening ceremony of the Olympic Games on August 5.
She was admitted to hospital, where doctors initially thought she was dehydrated, but her condition deteriorated after she developed a severe complication from a bacterial infection.
Her mother and brother flew out last week to Rio to be by her bedside.
Her management said that she managed to say to her mother, "I can't believe you have been here all week", and later, "Have you been to the beach?"
A spokeswoman for the presenter said: "Charlie's family and friends have been incredibly touched by the overwhelming support and love shown to Charlie today.
"Their main focus now is for Charlie to be stable enough to fly back to the UK."
The family offered their thanks to the doctors who have treated her and the British Consulate for their assistance.