Tuberculosis has once again hit at Palmerston North Boys High School, resulting in the isolation of a pupil after he spitted out blood.

The school was struck by a huge outburst of the sickness in 2006, which caused extensive testing and a third of year 9 students developing TB.

The latest sufferer is thought to have caught the non-contagious damage during the earlier epidemic. His infection developed into full-scale disease prior this year.

He was cured for the illness in 2006. However, less than 5% of people who undertake treatment continue to contract the sickness.

The MidCentral District Health Board is comforting households of the slight possibility of infection.

The young man is not deemed infectious any longer and for the last seven weeks was quarantined at his dwelling.

Medical Officer of Health, Jill McKenzie said that examining of contacts at greatest possibility of contagion has so far revealed no confirmation of the further swell of the disease.

He added, "It is unlikely that there will be a need for testing of students beyond the closest contacts of the case".

The year 13 pupil, who chose to remain anonymous, said that he was quarantined at his residence immediately after he started coughing up blood.

He said that it has been exasperating being confined inside and missing peers' birthdays.