Streptococcus infection in pigs: In pigs, Streptococcus suis is a highly important vertical infection that is related to several pathologies, such as meningitis, polyserositis, arthritis, endocarditis, pneumonia and septicaemia. Sometimes, tonsils act as carriers of this bacteria for a long time, and in stress periods they multiply and cause some of the problems described. In the image, a case of septicaemia caused by S. suis can be observed, which sometimes appear simultaneously with other listed pathologies, especially with pneumonia. However, cases of meningitis are the most serious in the presentation of this disease. For the prevention, proper management and biosecurity measures should be implemented, as well as to ensure a good nutritional and immune status of the pigs, and additionally, to detect the infection in sows, since it is transmitted vertically.