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  • Title: Evaluation of Echinococcus granulosus recombinant EgAgB8/1, EgAgB8/2 and EPC1 antigens in the diagnosis of cystic echinococcosis in buffaloes.
    Author: Rialch A, Raina OK, Tigga MN, Anandanarayanan A, Ganaie ZA, Aftab A, Lalrinkima H, Singh MN, Varghese A, Samanta S, Banerjee PS, Singh P, Verma MR.
    Journal: Vet Parasitol; 2018 Mar 15; 252():29-34. PubMed ID: 29559147.
    Abstract:
    Three recombinant proteins of Echinococcus granulosus including two antigen B sub-units EgAgB8/1 and EgAgB8/2 and Echinococcus protoscolex calcium binding protein 1 (EPC1) were expressed in prokaryotic expression vectors. The diagnostic potential of these three recombinant proteins was evaluated in the detection of cystic echinococcosis in buffaloes in IgG-ELISA. The EgAgB8/1 and EgAgB8/2 recombinant proteins reacted fairly with the hydatid infected buffaloes with sensitivity of 75.0% and 78.6%, respectively and specificity of 75.8% while EPC1 recombinant protein showed higher sensitivity (89.3%) but lower specificity (51.5%). Cross-reactivity of these three antigens was assayed with buffalo sera naturally infected with Explanatum explanatum, Paramphistomum epiclitum, Gastrothylax spp., Fasciola gigantica and Sarcocystis spp. EgAgB8/1 and EPC1 antigens cross-reacted with all these sera while EgAgB8/2 showed no cross-reaction with Sarcocystis spp. and reacted with some of the E. explanatum infected buffalo sera. This study explores the potential of three hydatid antigens viz. EgAgB8/1, EgAgB8/2 and EPC1 for their diagnostic potential in buffaloes positive for cystic echinococcosis.
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