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Updated: Oct 2, 2025
Magnetic Stirrer Method for the Detection of Trichinella Larvae in Muscle Samples
Published on: March 3, 2017
Validation of the Magnetic Stirrer Method for the Detection of Trichinella Larvae in Muscle Samples Based on
Mirosław Różycki1, Weronika Korpysa-Dzirba1, Aneta Bełcik1
1Department of Parasitology and Invasive Diseases, National Veterinary Research Institute in Pulawy, Al. Partyzantow 57, 24-100 Pulawy, Poland.
Abstract:
Trichinellosis is a zoonotic disease caused by the nematodes of the genus Trichinella. Infection takes place through the consumption of infected meat containing live larvae. The only way to prevent the disease is to break its epizootic chain. To ensure effective control of Trichinella spp., a range of preventive and control measures have been undertaken. These efforts have been focused on controlling Trichinella in domestic pigs, the main source of the disease. Artificial digestion is also the reference point for other methods for Trichinella risk control. Descriptive data validation of the digestion assay was presented in 1998 based on results published by scientific laboratories. Herein, we supplement those data by characterizing the method's performance in inter-laboratory comparisons. The source of data was the results of Proficiency Testing conducted in 2015-2019. Samples were contaminated by 0, 1, 3, and 5 larvae. In total, 7580 samples were examined by the laboratories. Based on Proficiency Testing results, the main parameters characterizing the method performance in field conditions were established as follows: specificity, 97.3%; sensitivity, 86.5%; accuracy, 89.2%; uncertainty, 0.3; limit of detection (LOD), 1 larva; and limit of quantification (LOQ), 3 larvae.
Insights
Trichinellosis prevention relies on controlling Trichinella nematodes in meat. Artificial digestion assays show high accuracy (89.2%) and specificity (97.3%) for detecting these parasites in food safety testing.
Area of Science:
- Veterinary Parasitology
- Food Safety
- Zoonotic Disease Control
Background:
- Trichinellosis is a significant zoonotic disease caused by Trichinella nematodes, primarily transmitted through undercooked infected meat.
- Controlling Trichinella in domestic pigs is crucial for preventing human infection, with artificial digestion serving as a reference method for risk assessment.
Purpose of the Study:
- To validate the performance of the artificial digestion assay for Trichinella detection.
- To characterize the method's performance in inter-laboratory comparisons using real-world proficiency testing data.
Main Methods:
- Analysis of Proficiency Testing results from 2015-2019, involving 7580 examined samples.
- Samples were artificially contaminated with 0, 1, 3, and 5 Trichinella larvae.
- Evaluation of assay parameters including specificity, sensitivity, accuracy, uncertainty, LOD, and LOQ.
Main Results:
- The artificial digestion assay demonstrated high specificity (97.3%) and accuracy (89.2%).
- Sensitivity was determined to be 86.5%, with an uncertainty of 0.3.
- The limit of detection (LOD) was established at 1 larva, and the limit of quantification (LOQ) at 3 larvae.
Conclusions:
- The artificial digestion method is a reliable tool for Trichinella risk control in food safety.
- Inter-laboratory comparisons confirm the method's robust performance under field conditions.
- Continued monitoring and validated testing methods are essential for preventing trichinellosis transmission.
