Health officials have confirmed that Craig White, a 21-year-old journalism student at the University, died of tuberculosis.
His friends have been advised screening for the disease following a postmortem examination which revealed the cause of death. Symptoms of TB include fever, weight loss, blood in phlegm and unexplained cough. Symptoms may take some time to show up and can be treated with antibiotics.
According to tweets before his death, White had mentioned experiencing constant headaches.
HPA, Dr Katie Geary, a consultant in communicable disease control, said: "Our thoughts are with the family at this sad time. As part of normal practice, all close contacts considered to be at risk of contracting the disease will be offered screening to see if they've been exposed to the infection. Exposure to the infection through contact with someone who has the illness does not mean that an individual will go on to develop TB. Transmission occurs through coughing of infectious droplets and usually requires prolonged close contact with an infectious case."