Health officials warn a second confirmed case of measles has been identified in Brisbane within 24 hours.

An Ipswich area woman had visited areas in Ipswich and Brisbane before she realised she was infectious.

A second case of measles has been confirmed in Brisbane.

West Moreton Health public health physician Vicki Slinko said residents in the Brisbane and Ipswich areas should be alert for symptoms over the next couple of weeks.

The woman took the 444 bus from Indooroopilly to South Bank on Friday nigh, where she visited the Max Brenner chocolate bar.