摘要 |
<p>An antigen comprising: an excretory/secretory protein derived from a parasitic stage of Trichostrongylus colubriformis having an approximate molecular weight of 11kD, 17kD, 30kD, 37kD or 81kD as estimated by SDS-PAGE; or a part, an analogue, a homologue, a derivative or combinations thereof of said excretory/secretory protein, which antigen is capable of conferring protective immunity on a host against infection by a parasitic nematode.</p> |