Another two schools have been hit by the scarlet fever outbreak.
St Peter and Paul in Coldside, and Barnhill in Broughty Ferry have issued letters to parents and families, encouraging them to contact a health professional if they think their child has caught the disease.
This brings the total to nine schools affected in Dundee in the last few weeks. So far more than 3,500 children may have been exposed to the contagious disease across the city.
Scarlet fever develops from a particular type of throat infection and can be successfully treated with a course of antibiotics.
However, in rare cases it can develop into more serious conditions such as meningitis and pneumonia. The disease is most common in young children who have not built up immunity to the bacteria that causes it.
Scarlet fever can be identified by a pink-red rash that feels like sandpaper. Although the number of children who are understood to have contracted the condition is still relatively low, it is highly contagious.
The schools are therefore stressing that any pupil with scarlet fever should stay off school for at least 24 hours once they have started the course of medication prescribed by their GP.
Craigiebarns Primary headteacher, Julie Lemon, advised parents to keep their children off school for five days.
She said: “Should your child be confirmed with the infection and be prescribed antibiotics you need to keep your child off school for five days from the day they start the medication.”
According to public health officials this latest outbreak is part of a national trend, with reported cases of scarlet fever at a 24-year high.
Education convener Stewart Hunter confirmed that advice had gone out to schools that are not yet affected, in case the outbreak continues to spread.
He said: “We always advise that if parents have any concerns they should get their child to a doctor and make sure schools are aware of the issue.”