By Aaliyah Rugg & Steven White A mum who scraped her arm on a wall while on holiday almost died days later after contracting a life-threatening bacterial disease that ‘eats’ the flesh. Alex Donaldson was visiting her dad in Spain during November last year when she met up with a few friends before travelling home. However, as she gave them a hug she scratched herself slightly on a wall – but thought nothing of it. After flying home the next day, though, she noticed her arm had began to swell and soon became “hot and painful”. The concerned 46-year-old from Prescot, Merseyside visited A&E and wa…