A disease detected simultaneously in Barcelona, Lyon, and Berlin could be emerging as a new sexually transmitted infection (STI). This is the conclusion reached by professionals at Vall d'Hebron Hospital after diagnosing a dozen cases of dermatophilosis in recent months, a rare skin infection in humans caused by bacteria associated with animals, especially livestock such as horses, goats, and cows. This time, however, professionals believe that transmission has been from person to person through sexual contact, far from the animals that generally cause contagion and the tropical areas where this disease is more frequent.