Infectivity of Trichinella isolates in Pigs

Pigs were inoculated with Trichinella from swine and dog,and the international standard Trichinella Isolates:T.spiralis and T.nativa in Hei Longjiang Province.It was found that infectivity of Trichinella from swine and dog,T.spiralis and T.nativa in pigs was significantly different.Swine isolate and T.spiralis were highly infective to pigs with Reproductive Capacity Indexes(RCI) of 385.68 and 300.55 respectively,however,pigs were relatively refractor to dog isolate and T.nativa with RCIs of 0.064 and 0.033 respectively.It was concluded that Trichinella from swine and dog in Heilongjiang Province China belong to Trichinella spiralis and Trichinella nativa respectively, Trichinella from dog is not infective to pigs,and would not present a major zoonotic threat to the human consumer via pigs inadvertently becoming infected.