Ear necrosis in pigs: this syndrome usually takes place in weaned and fattening pigs, between 10 and 40 kg. Lesions start with a superficial vesicular dermatitis that can become hemorrhagic and cause deep necrotic ulcers with ischemia. It is a multifactorial syndrome with multiple etiologies, Staphylococcus hycus and Streptococcus suis are two of the isolated microorganisms, among others.