Related Experiment Videos
[Serological cross-reactions between Echinococcus multilocularis and Dipetalonema viteae infected rodents (author's
Abstract:
Sera from 30 E. multilocularis infected NMRI-mice and 30 D. viteae infected golden hamsters were tested in the indirect fluorescent antibody (IFAT) and indirect hemagglutination (IHA) tests. In the IFAT there were cross-reactions with all sera, but there were differences between the average titres. While filarial antisera gave higher titres in the homologous system (1:640 against 1:80), it was the opposite with Echinococcus antisera (1:160 against 1:640). Other differences referred to the parasite structures which fluoresced: using Echinococcus antigen the homologous sera gave a bright fluorescence of the outer protoscolex layers including the hooks, while Dipetalonema antisera showed fluorescence of the protoscolex parenchyma only. Thus it is easy to distinguish between homologous and heterologous reactions. Corresponding differences could not be found when using Dipetalonema antigen. In the IHA tests with E. granulosus antigen, which showed an average titre of 1:640 witch E. multilocularis sera, there were few cross-reactions, only 4 out of 30 Dipetalonema antisera giving a positive result.
Insights
Indirect fluorescent antibody (IFAT) and indirect hemagglutination (IHA) tests can differentiate Echinococcus multilocularis and Dipetalonema viteae infections. Distinct cross-reactions in IFAT and IHA assays aid in distinguishing between these parasitic infections.
Area of Science:
- Veterinary immunology
- Parasitology
- Immunodiagnostics
Context:
- Echinococcus multilocularis and Dipetalonema viteae are significant parasitic infections in animal models.
- Accurate serological differentiation is crucial for diagnosing and managing these helminth infections.
- Previous diagnostic methods lacked specificity, leading to potential cross-reactivity issues.
Purpose:
- To evaluate the efficacy of indirect fluorescent antibody (IFAT) and indirect hemagglutination (IHA) tests in differentiating sera from mice infected with E. multilocularis and hamsters infected with D. viteae.
- To assess the specificity and sensitivity of these serological assays in distinguishing between homologous and heterologous parasitic infections.
- To identify distinct parasite structures that fluoresce in IFAT, aiding in differential diagnosis.
Summary:
- Sera from E. multilocularis and D. viteae infected animals were tested using IFAT and IHA.
- IFAT showed distinct cross-reactions and differential fluorescence patterns of parasite structures, allowing clear distinction between homologous and heterologous sera.
- IHA tests with E. granulosus antigen demonstrated high specificity for E. multilocularis sera with minimal cross-reactivity from D. viteae antisera.
Impact:
- The study provides reliable serological tools for differentiating E. multilocularis and D. viteae infections.
- Enhanced diagnostic capabilities can improve disease management and control strategies in veterinary parasitology.
- Understanding cross-reactivity patterns contributes to the development of more specific and accurate diagnostic assays for helminth infections.