Outbreaks of Pyogenic Arthritis in New-born Piglets and Stillbirth Caused byStaphylococcus hyicussubsp.hyicus

Abstract

Staphylococcus hyicussubsp. hyicus was isolated in pure culture from the joints of two newborn piglets with arthritis and the lung and the stomach of a stillbirth in Torrori Prefecture during October, 1982 to January, 1983.
Arthritis broke out in piglets 2 or 3 days old of the same litter on two farms. Stillbirth occurred in a sow on another farm.
On these farms, S. hyicuswas also isolated from 17 of 21 swabs collected from the skin of dams.
In the cross agglutination test, three strains ofS. hyicusisolated from the three farms showed a remarkable cross reaction with one another, but a one-sided reaction to the reference strain of ATCC 11249. On the contrary, all the 23 strains isolated from these farms and the reference strain produced an identical precipitation line in the agar gel diffusion test.