Spores of the fungus are present in the air

Both babies were affected by aspergillus.

What is aspergillus?

It is a common airborne fungus, which is more prevalent in autumn and winter.

Most people are naturally immune, but those with a weakened immune system can become infected.

In addition to babies, it is also particularly dangerous for patients who have undergone transplants and people with leukaemia and Aids and may also trigger asthma.

When was it first discovered?

An Italian priest and biologist called Pietro Antonio Micheli first identified it in 1729.

Its shape inspired him to name it after an aspergillum, the instrument used for the dispersion of holy water in Catholic churches.

How can it kill?

If the infection gets into the body through a cut or a wound, it can cause fever and a cough or breathing problems.

It can then move from the lung through the blood stream to the brain or other organs including the heart and the kidneys and the skin.

There is no one test to diagnose aspergillus. However early treatment is key, so it usually has to be given before the condition is only suspected.

How is it treated?

Patients are given antifungal drugs. Some may also require surgery.