She was a fun-loving girl excited to start preschool. But instead, 3 1/2 year old Brooklyn Hoksbergen ended up in the hospital last week after contracting E. coli. Her family tells KING 5 she passed away Friday.

Her father, Rob Hoksbergen, says they do not know how or where Brooklyn became sick. She was admitted to Children’s Hospital Wednesday, and initially showed signs of improvement. But doctors tell the family she took a sudden turn for the worse and passed away.

Brooklyn was the youngest of four daughters. No one else in the family is ill. Her funeral is Friday.

Four-year-old Serena Profitt died Monday in Oregon from E. coli.