A six-year-old girl has been injected with a used needle that was hidden between two bus seats and will have to wait up to nine months to find out if she has any infections. Matilda Dalley, from Immingham, Lincolnshire, was on the bus with her three stepsisters Courtney Burr, 17, Aimee Burr, 15, and Keira Burr, 9, travelling from Grimsby to Cleethorpes. The syringe had been concealed underneath a ticket on the number four Stagecoach bus the girls travelled on last Saturday at around 1pm. Matilda Dalley, from Immingham, Lincolnshire, was on the bus with her three stepsisters Courtney Burr, 17, Aimee Burr, 15, and Keira Burr, 9, travelling from Grimsby to Cleethorpes when she sat on the used needle. Pictured left to right: Robert Burr, Courtney, Matilda, Keira, Aimee and Nikki Dalley When Matilda sat down she said she felt a 'sharp stab' and started crying. Her stepsisters, who thought Matilda had been pricked with a feather, were shocked when they found a used needle. Courtney and Aimee were also stabbed by the needle as they removed it from their stepsister. In an interview with the Grimsby Telegraph, Courtney said: 'I handed the needle over to the bus driver and he just said "Thanks, sorry about that". 'He didn't ask if we'd been pricked.' Matilda's mother, Nikki Dalley, said: 'I was in a complete panic. They'd been back around an hour and Courtney said Matilda had been stabbed by a needle on the bus.' Matilda was taken to Grimsby's Diana, Princess of Wales hospital and all three girls received hepatitis B treatment as a precaution because the infection can survive on a needle for up to four days. Courtney and Aimee were both pricked by the needle as they removed it from their stepsister The syringe had been concealed underneath a ticket on the number four Stagecoach bus. Stock picture After the girls got blood tests the family were told that it could take up to nine months for 'something to show up'. They will also be forced to undergo the same blood tests twice more in a few weeks. Ms Dalley is now urging local bus drivers to conduct thorough seat checks so this doesn't happen again. She said: 'It does happen in our area. Needles are also left in parks and children, being children, touch them and can be pricked.' The correct procedure to follow if someone gets pricked by a needle is to squeeze the wound so it bleeds more then wash it in warm water before covering it and going to hospital. A Stagecoach spokesman said: 'We are very concerned to hear of this incident and our thoughts are with the little girl and her mum. After Matilda got blood tests the family were told that it could take up to nine months for 'something to show up' 'It is totally irresponsible for anyone to discard a needle on one of our buses, which they must know is likely to cause a danger to other people. 'All of our buses are fitted with CCTV, which can be used in evidence to prosecute individuals engaged in antisocial behaviour. 'Thankfully, incidents of this nature are extremely rare and bus travel remains one of the safest forms of road transport. 'However, should anyone find any potentially dangerous items left by passengers on our buses they should immediately report it to the driver so that appropriate action can be taken. 'Bus drivers in Grimsby and Cleethorpes are in radio contact with supervisory staff who can quickly provide emergency assistance.' All rights reserved for this news site dailymail and under his responsibility