Streptococcal infections of pigs and practical aspects of industrial manufacture

Abstract

Streptococcus suis is one of the most common infectious agents in countries with highly developed pig breeding. The disease caused by this pathogen is characterized by septicemia and sudden death, as well as acute meningitis, polyserositis, pneumonia, polyarthritis and serous-purulent dermatitis. The first data on infection S.suis were published in the Netherlands (Jansen & Van Dorssen, 1951) and England (Field et al., 1954). Since that time, streptococcosis has received worldwide distribution, and the issue of combating it remains relevant now. In streptococcal infections, the number of carrier pigs reaches 100%. Cases of the disease vary depending on the growing period and usually do not exceed 5%. There are three clinical forms of the disease - acute, subacute and chronic. The acute form occurs in the form of septicemia and by sudden death, subacute is most often manifested in the form of meningitis. The control is based on the prevention of the predisposing factors, antibiotic therapy and the elimination of the pathogen in the environment. The veterinary control scheme for streptococcosis allows to achieve 95% of the therapeutic effect and is a key means of protecting the enterprise against economic losses associated with S.suis