More Ysgol y Strade pupils in Llanelli offered TB screening 12 December 2013 Last updated at 13:52 Screening for tuberculosis (TB) is being offered to a further 224 pupils at a comprehensive school in Carmarthenshire after a staff member was diagnosed with the infection. In October, 122 children and 29 members of staff were screened for TB at Ysgol y Strade, Llanelli. Three of those pupils and a member of staff tested positive, but none are believed to be infectious and there is no ongoing risk within the school. Up to 80 staff could also be screened. Sion Lingard, acting consultant in health protection for Public Health Wales (PHW), said TB can be treated with antibiotics. "We are emphasising to pupils, parents and staff that it is rare for TB to be transmitted within a school environment," said Mr Lingard. Close contact with an infectious individual over a long time period, such as living in the same household, is usually required for a person to become infected with TB. Less contact The infection is difficult to catch but treatable with antibiotics. The latest round of screening is for those who have had less contact with the member of staff. Mr Lingard added the case at the school was not linked to another four cases of TB in the Llanelli area over the last 12 months. PHW said anyone who is concerned about their health should speak to their GP or contact NHS Direct Wales on 0845 46 47.