Conjugated silver nanoparticles as a diagnostic tool for circulating hydatid antigens

Area of Science:

• Parasitology
• Immunology
• Nanotechnology

Background:

• Cystic hydatid disease, caused by Echinococcus granulosus larvae, is a major global zoonotic concern.
• Clinical and imaging diagnoses of cystic echinococcosis are often inconclusive.
• Reliable serological tests are crucial for definitive diagnosis.

Purpose of the Study:

• To evaluate a novel nano silver-based enzyme linked immunosorbent assay (ELISA) for detecting circulating hydatid antigen in human serum.
• To compare the diagnostic performance of nano silver-based ELISA with traditional ELISA methods.

Main Methods:

• The study involved 66 human serum samples: 36 confirmed hydatidosis cases, 15 with other parasitic infections, and 15 healthy controls.
• Circulating protoscolices antigen was detected using nano-silver dot ELISA, nano-silver sandwich ELISA, and traditional dot and sandwich ELISA techniques.

Main Results:

• Nano-silver dot ELISA demonstrated high sensitivity (97.2%) and specificity (93.3%).
• Nano-silver sandwich ELISA showed 94.4% sensitivity and 96.7% specificity.
• Nano-silver-based ELISA methods outperformed traditional ELISA in sensitivity, specificity, predictive values, and diagnostic accuracy.

Conclusions:

• Nano silver-based ELISA presents a highly sensitive and specific diagnostic approach for cystic echinococcosis.
• This advanced ELISA technique can be recommended as a confirmatory test for diagnosing cystic hydatid disease.