Immunodiagnostic Detection of Angiostrongylus cantonensis Exposure on Hawaii Island Using Isogeographic 31-kDa Antigen
Issued Date
2023-08-02
Resource Type
eISSN
14761645
Scopus ID
2-s2.0-85154568885
Pubmed ID
37308099
Journal Title
The American journal of tropical medicine and hygiene
Volume
109
Issue
2
Start Page
335
End Page
342
Rights Holder(s)
SCOPUS
Bibliographic Citation
The American journal of tropical medicine and hygiene Vol.109 No.2 (2023) , 335-342
Suggested Citation
Jarvi S.I., Nakayama K., Eamsobhana P., Kaluna L., Shepherd L., Tagami Y. Immunodiagnostic Detection of Angiostrongylus cantonensis Exposure on Hawaii Island Using Isogeographic 31-kDa Antigen. The American journal of tropical medicine and hygiene Vol.109 No.2 (2023) , 335-342. 342. doi:10.4269/ajtmh.22-0643 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/88281
Title
Immunodiagnostic Detection of Angiostrongylus cantonensis Exposure on Hawaii Island Using Isogeographic 31-kDa Antigen
Author's Affiliation
Other Contributor(s)
Abstract
Angiostrongylus cantonensis is the leading cause of neuroangiostrongyliasis worldwide, and east Hawaii Island is a hotspot for the disease in the United States. A combination of glycoproteins with molecular weight of 31 kDa has been used as antigen to evaluate antibody response in human serum samples in Thailand with high specificity and sensitivity. In a previous pilot study, the Thailand-isolated 31-kDa proteins showed efficacy in dot-blot tests using serum samples from 435 human volunteers on Hawaii Island. However, we hypothesized that native antigen isolated from Hawaii A. cantonensis may exhibit higher specificity than the Thailand-isolated 31-kDa antigen due to potential minor variation in epitopes between isolates. In this study, 31-kDa glycoproteins were isolated by sodium dodecyl-sulfate polyacrylamide gel electrophoresis from adult A. cantonensis nematodes collected from rats captured on east Hawaii Island. The resultant proteins were purified by electroelution, pooled, bioanalyzed, and quantified. A subset of 148 samples from human participants of the original cohort of 435 was consented for this study, including 12 of the original 15 clinically diagnosed participants. Results of ELISA using the Hawaii-isolated 31-kDa antigen were compared with results of the same serum samples previously tested with both crude Hawaii antigen ELISA and Thailand 31-kDa antigen dot blot. This study shows a seroprevalence in the general population of East Hawaii Island of 25.0%, similar to previous findings of 23.8% seroprevalence in this cohort using crude antigen from Hawaii A. cantonensis and 26.5% using Thailand 31-kDa antigen.