As cultural successors, hedgehogs reside in close proximity to humans. Close contacts, however, are not only beneficial but also bear risks for animals and humans. Road traffic, lawn mowers and infectious agents threaten the prickly insect eaters. Some infectious agents can be transmitted to humans. Considerate treatment of wildlife and appropriate hygiene measures minimize the risk of infection, though. A recent study, initiated by the National Consiliary Laboratory for Diphtheria (CL-Diphtheria) in Germany and conducted in close collaboration of five federal state laboratories and the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW), identified Corynebacterium ulcerans - a close relative of the diphtheria causing bacterium - in hedgehogs. The study is published in „Emerging Microbes & Infections“.