More than 110 blood donors have contacted the Red Cross in the past 24 hours to report their consumption of Patties frozen berries, as hepatitis A outbreak fears mount.

The Australian Red Cross Blood Service has urged anyone who has eaten the Nanna's one kilogram 'mixed frozen berries' product - linked to all confirmed cases - and donated blood on or after November 1 last year to contact them immediately.

"We only need donors who have consumed that product to contact us right now, as we need to focus on identifying the most at-risk donations in our system," said Red Cross spokesman Shaun Inguanzo.