1982 Volume 1982 Issue 19 Pages 89-92
An ecolog cal survey on Getah virus among swine was conducted over a period from June 22 to October 29, 1979. In it 11 sentinel pigs were set in a pig pen near the Miho Training Center (T. C.) in Ibaraki Prefecture. In this survey, 3 virus strains were isolated from plasma of swine in Vero or HmLu-1 cell culture. Of them, two (MIP-124 and -125) were isolated on August 27 and identified as Japanese encephalitis (JE) viruses. The remaining strain (MIP-99) was isolated on September 10, related closely with the Haruna strain, and identified as Getah virus by the plaque reduction neutralization test (PRNT). In addition, serum neutralizing (SN) antibody against the JaGAr01 strain of JE virus was demonstrated in all the 11 sentinel pigs on September 3. SN antibody against the MIP-99 strain of Getah virus was first detected in two of the 11 pigs on September 10. Subsequently, it was demonstrated in 4 sentinel pigs on September 17. Of the remaining sentinel pigs, except two, it was observed on October 10, 16, and 29, respectively. These results suggested that swine might be involved in Getah virus transmission in nature and play an important role as an amplifier or the natural host of the virus.
