Development of a highly sensitive IgG-ELISA based on recombinant arginine kinase of Toxocara canis for serodiagnosis of visceral larva migrans in the murine model.
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| Abstract |
Toxocariasis is a worldwide zoonotic disease caused by the ascarid nematode Toxocara canis. The most common method available for serodiagnosis of toxocariasis is an enzyme-linked immunosorbent assay (ELISA) test using Toxocara excretory-secretory antigen (TES). The present study describes the development of IgG-ELISA based on antiserum prepared against the recombinant arginine kinase of Toxocara canis. Antiserum was prepared against the purified recombinant arginine kinase (AK) using 6-week-old female Japanese white rabbits. Serum samples were collected from experimentally infected BALB/c and C57BL/6 mice at different time periods. The IgG-ELISA was performed using serum samples from mice (infected/uninfected) and TES antigen with antiserum prepared against the recombinant-AK. The optical density (OD450) was measured at 450 nm using a micro-plate ELISA reader. There were significant differences (P<0.01) in the absorbance between infected and control serum samples. Further, we obtained 100% sensitivity for the serum samples from T. canis-infected mice. Therefore, it is suggested that the recombinant-AK based IgG-ELISA could be applied for immunodiagnosis of human toxocariasis. However, it is necessary to evaluate the specificity of this recombinant antigen with similar geohelminth infections.
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| Authors | Susiji Wickramasinghe, Lalani Yatawara, Mitsuru Nagataki, Misa Takamoto, Yoshiya Watanabe, R P V J Rajapakse, Kouji Uda, Tomohiko Suzuki, Takeshi Agatsuma |
| Journal | Parasitology research (Parasitol Res) Vol. 103 Issue 4 Pg. 853-8 (Sep 2008) ISSN: 0932-0113 [Print] Germany |
| PMID | 18575890 (Publication Type: Evaluation Study, Journal Article) |
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