Seasonal emergence of swine erysipelas in hilly state Nagaland, Northeast India

Abstract

Seasonal outbreaks of swine erysipelas have been reported in back yard pig farms in the Phek district of Nagaland, India. The alpha haemolytic isolate of Erysipelothrix rhusiopathi ae was recovered on blood agar from the clinical samples. The organism s were confirmed microscopically, biochemical analysi s as well as by polymerase chain reaction (PCR) amplification of 16S rRNA gene and sequence analysi s. These Nagaland isolates (KT160358, KT160359) were closely related to the type spp. E. rhusiopathiae in phylogenetic analysi s and form s the same clad with Chineese isolates of swine and murine origin indicating an epidemiological link. The isolates were found to be most sensitive to oxytetracycline and responded to treatment. Swine erysipelas occurred in Phek district in a season due to sudden change of weather and temperature. Pigs exposed to such predi sposing factors probably favoured to propagation of already persi sted organi sm s in pigs. Thi s i s the first confirmed case of E. rhusiopathiae infection from the NE states of Nagaland, India.

Primary skin diseases and cutaneous manifestations of systemic diseases in swine

“…Brum et al (2013), when studying swine infectious and parasitic diseases, diagnosed erysipelas in 1.4% of cases. Histological findings observed in this study were similar to those described by other authors (Barman et al 2016, Mauldin & Peters-Kennedy 2016, which were mainly characterized by vasculitis, degeneration and fibrinoid vascular necrosis, as well as multifocal necrosis in the dermis and subcutaneous tissue associated with fibrin deposition, thrombosis and neutrophilic inflammatory infiltrate in sweat gland ducts.…”