Cases of babies born infected with a bacteria which can kill or leave them with life changing conditions are on the increase - even though they are preventable. In the UK two babies die every month and dozens more are left mentally and physically disabled by Group B Streptococcus - sometimes known as GBS or 'Strep B' - a bacteria which affect something like 500 newborns every year. 5 live Investigates has learned that the number of babies born with the infection increased by 12 per cent between 2011 and 2015. Campaigners who delivered a petition with a quarter of a million signatures earlier this year to the Department of Health, say that a simple test to detect GBS would cost the Health Service just £11 for every pregnant mum. The UK National Screening Committee which advises ministers and the NHS say the current test for 'Strep B' can't tell between between women whose babies will be affected and those who won't. They say that as a result, thousands of women would receive antibiotics during labour with unknown consequences.