Multiple Streptococcus species implicated in lameness and central nervous system signs in piglets and sows
Thomas J. Fangman DVM, MS, Dipl ABVP-SHM; William H. Fales PhD, ACVM (honorary)
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[beta]-hemolytic streptococcus (Streptococcus equisimilis) was isolated from swollen joints and meninges of suckling and nursery pigs in a 360-sow, farrow-to-finish herd. Incidence of clinical outbreaks of lameness and central nervous system dysfunction in neonates and weaned pigs had increased in the herd after introduction of new breeding stock in 1993. Isolation of S. suis from some pigs further complicated the clinical picture. Clinical signs abated after autogenous vaccines were administered to pigs, but reappeared in piglets and sows during periods of stress over the next several years. Streptococcal-related disease often occurs in sporadic outbreaks that are believed to be triggered by stress factors and/or the occurrence of subpopulations of naïve animals.
Keywords: Streptococcus, suis, equisimilis, bisecurity, vaccination protocols
Cite as: Fangman TJ, Fales WH. Multiple Streptococcus species implicated in lameness and central nervous system signs in piglets and sows. J Swine Health Prod 1999;7(3):113-115.
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