Seasonal emergence of swine erysipelas in hilly state Nagaland, Northeast India
Keywords:
Swine erysipelas, Erysipel othri x rhusiopathiae, pig, polymerase chain reaction (PCR) Nagaland, India, Oxytetracycline.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 rhusiopathiae was recovered on blood
agar from the clinical samples. The organisms were confirmed microscopically, biochemical analysis as
well as by polymerase chain reaction (PCR) amplification of 16S rRNA gene and sequence analysis.
These Nagaland isolates (KT160358, KT160359) were closely related to the type spp. E. rhusiopathiae in
phylogenetic analysis and forms 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 predisposing factors probably favoured to
propagation of already persisted organisms in pigs. This is the first confirmed case of E. rhusiopathiae
infection from the NE states of Nagaland, India.
