Protein A/G-based enzyme-linked immunosorbent assay for detection of anti-Pythium insidiosum antibodies in human and animal subjects

• Published in: BMC research notes 2020-03, Vol.13 (1), p.135-135, Article 135
• Main Authors: Jaturapaktrarak, Chalisa, Payattikul, Penpan, Lohnoo, Tassanee, Kumsang, Yothin, Laikul, Aree, Pathomsakulwong, Watcharapol, Yurayart, Chompoonek, Tonpitak, Walaiporn, Krajaejun, Theerapong
• Format: Article
• Language: English
• Subjects: Animals; Antibodies; Antibodies - blood; Bacterial Proteins - chemistry; Bacterial Proteins - immunology; Care and treatment; Case-Control Studies; Cats; Cattle; Communicable diseases; Diagnosis; Diseases; Dogs; Early Diagnosis; ELISA; Enzyme-linked immunosorbent assay; Enzyme-Linked Immunosorbent Assay - methods; Enzyme-Linked Immunosorbent Assay - standards; Enzymes; Horses; Humans; Identification and classification; Immune Sera - chemistry; Immunoassay enzymes; Immunodiagnosis; Immunoglobulins; Laboratories; Methods; Protein A/G; Proteins; Pythiosis; Pythiosis - blood; Pythiosis - diagnosis; Pythiosis - immunology; Pythiosis - parasitology; Pythium; Pythium - immunology; Pythium - isolation & purification; Pythium insidiosum; Research Note; Sensitivity and Specificity; Staphylococcal Protein A - chemistry; Staphylococcal Protein A - immunology; Tropical diseases
• ISSN: 1756-0500; 1756-0500
• DOI: 10.1186/s13104-020-04981-y

Pythiosis is a deadly infectious disease caused by Pythium insidiosum. Reports of both human and animal pythiosis are on the rise worldwide. Prognosis of the pythiosis patients relies on early diagnosis and prompt treatment. There are needs for an immunodiagnostic test that can detect the disease in both humans and animals. This study aims at reporting an optimized protocol for the development of a protein A/G-based enzyme-linked immunosorbent assay (ELISA) for the detection of anti-P. insidiosum antibody in multiple host species. A total of 25 pythiosis and 50 control sera, obtained from humans, horses, dogs, cats, and cows, were recruited for the assay development. With a proper ELISA cutoff point, all pythiosis sera can ultimately be distinguished from the control sera. The successfully-developed protein A/G-based ELISA can detect the anti-P. insidiosum antibodies in serum samples of both humans and animals. It is a versatile, feasible-to-develop, and functional immunodiagnostic assay for pythiosis.