"We woke up to the sound of her screaming at 2am," Samah al-Daabla, the mother of four-year-old Mayaseen, tells the BBC.
"When my husband turned on the torch, the weasel ran away. I looked at my daughter's hand, and it was all blood. Everything was bloody."
In the Gaza Strip, left devastated by war, the daily battles are now with rats, urban weasels and other pests spreading diseases.
Aid workers are calling for urgent steps to counter a public health crisis.
Cogat, the Israeli defence body that controls Gaza's crossings, says it is working with international organisations "to address sanitation needs".
