Parents have been warned to test their children for tuberculosis symptoms after a toddler tested positive for the disease, the 100th case of the potentially deadly disease diagnosed so far this year.

The diagnosis was confirmed by a North Perth daycare, putting parents on high alert.

Press PLAY to hear more about the worrying increase in tuberculosis cases

Curtin Medical School Institute for Respiratory Health physician Fraser Brims told Julie-Anne Sprague on 6PR Afternoons there’s a strong focus on investigating the spread of the disease.

“If anyone feels like they may have been in contact [with the disease], one of the main things to look out for is a prolonged cough that lasts for weeks,” Dr Brims said.