In the present study, four murine monoclonal antibodies (MAbs) were generated against the excretory/secretory (ES) products of Angiostrongylus cantonensis adult worms; two represented IgG1 and two represented IgM MAbs, and they were designated 12D5, 15F8, 21B7 and 14G10, respectively. Immunoblotting revealed that all of the MAbs predominantly recognized a 98 kDa antigen in the ES products of A. cantonensis adult worms, and no cross reactions were found with the whole worm antigens of some other common parasites, namely, Schistosoma japonicum, Clonorchis sinensis, Paragonimus westermani, Ascaris lumbricoides, Trichinella spiralis, Anisakis sp., Echinococcus granulosus, Taenia solium, and Spirometra erinacei. Immunolocalization showed that all of the four MAbs reacted with the cuticle of the adult parasite, the external surface of its intestinal canal and reproductive organs, and its egg and first-stage larvae in the lungs of rats experimentally infected with A. cantonensis. The generation and characterization of four specific MAbs against A. cantonensis ES antigens provide foundation for the development of specific immunological diagnostic techniques for human infections with A. cantonensis.
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