Larson D J, Solorzano R F, Morehouse L G, Olson L D
J Am Vet Med Assoc. 1980 Mar 15;176(6):539-42.
A strain of transmissible gastroenteritis (TGE) virus of low virulence was isolated from 14-day-old pigs suckling sows vaccinated with an attenuated TGE vaccine. Diarrhea developed in suckling pigs approximately 14 days after farrowing in 4 farrowings; however, none of these pigs died from diarrhea. Diarrhea ceased after the 4th farrowing, when vaccination of sows was discontinued. Experimentally, both the field isolate and the vaccine strain were infective and in some instances lethal for 2-day-old pigs exposed orally; however, neither strain was as virulent as the Purdue strain.
从接种了减毒传染性胃肠炎（TGE）疫苗的哺乳母猪所产14日龄仔猪中分离出一株低毒力的TGE病毒。在4窝仔猪中，哺乳仔猪在分娩后约14天出现腹泻；然而，这些仔猪均未死于腹泻。在第4窝分娩后，母猪停止接种疫苗时，腹泻停止。实验表明，该田间分离株和疫苗株对经口接触的2日龄仔猪均具有感染性，在某些情况下具有致死性；然而，这两种毒株的毒力均不如普渡毒株。
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