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Year : 2012  |  Volume : 2  |  Issue : 1  |  Page : 38-44

Evaluation of Dot-ELISA and enzyme-linked immuno-electrotransfer blot assays for detection of a urinary hydatid antigen in the diagnosis of cystic echinococcosis

1 Department of Microbiology, Sree Ramasamy Memorial Medical College Hospital and Research Centre, Potheri, Sri Ramaswamy Memorial University, Kattankulathur, Tamilnadu, India
2 Department of Microbiology, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry, India

Correspondence Address:
Subhash Chandra Parija
Department of Microbiology, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2229-5070.97238

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Background: Several serological assays are used for detection of a hydatid antigen in serum for diagnosis of cystic echinococcosis (CE). However, it requires technical expertise and is associated with the risk of acquiring blood-borne infections. Of late, interests have been shifted to other body fluids like urine, saliva, tear drops as alternate specimens in the diagnosis of CE. Aim: The aim of the study was to evaluate the dot enzyme-linked immunosorbent assay (Dot-ELISA) and electro-immunotransfer blot (EITB) for detection of a hydatid antigen in the urine for diagnosis of CE. Materials and Methods: 100 ml of urine samples were collected from the patients with confirmed CE (n=30), patients with suspected CE (n=30), patients with other diseases (n=30) and healthy controls (n=30). A hydatid antigen in urine was detected by Dot-ELISA and EITB using only polyclonal antibodies raised against a complete homogenate hydatid (CHH) antigen in rabbits. Results and Conclusions: The Dot-ELISA using polyclonal antibodies showed a sensitivity of 53.33% and specificity of 96.66%, whereas EITB showed a sensitivity of 46.66%. The Dot-ELISA and EITB employing polyclonal antibodies showed no significant difference in sensitivity (P=0.426). Hence, the Dot-ELISA being a simple procedure can be used for detection of a hydatid antigen in urine for diagnosis of CE.

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