Just some interesting bacteria cells that could possibly help add some creepy vibes to the whole magic disease concept. I especially love the small hairs sticking out and creating this "sticky" feeling.
This year's Longitude Prize is focused on the growing problem of antibiotic resistant bacteria. They've put together a nice image, shown below, which showcases what they term 'the ten most dangerous antibiotic resistant bacteria'. You can read more detail on each of them here: http://www.nesta.org.uk/news/antibiotic-resistant-bacteria