Magnetic Nanotrap Particles Preserve the Stability of Venezuelan Equine Encephalitis Virus in Blood for Laboratory Detection.
Authors: Akhrymuk Ivan, Lin Shih-Chao, Sun Mei, Patnaik Anurag, Lehman Caitlin, Altamura Louis, Minogue Timothy, Lepene Ben, van Hoek Monique L, Kehn-Hall Kylene
Journal: Frontiers in veterinary science
Summary
# Editorial Summary: Magnetic Nanotrap Particles for Stabilising Venezuelan Equine Encephalitis Virus Samples Diagnosis of Venezuelan equine encephalitis virus (VEEV) relies on detecting viral antigens and nucleic acids in blood, yet field conditions and long-distance sample transport frequently compromise sample integrity before laboratory analysis can occur. Akhrymuk and colleagues evaluated whether magnetic Nanotrap particles—which have previously shown promise in capturing and concentrating various respiratory and haemorrhagic viruses—could preserve VEEV stability in whole blood exposed to elevated temperatures and extended storage periods. When samples were treated with Nanotrap particles, detectable infectious VEEV remained equal to or greater than untreated controls across all temperature conditions, whilst viral RNA detection improved substantially at 72 hours and 40°C, and capsid protein detection was similarly enhanced through 72 hours at elevated temperature; critically, untreated samples showed undetectable capsid protein at these timepoints. These findings were validated in vivo using mice intranasally infected with the TC-83 vaccine strain, confirming that Nanotrap particles could substantially extend VEEV detectability in blood under field-relevant conditions. For equine professionals involved in biosecurity and disease surveillance, particularly in regions where VEEV is endemic or emerging, this technology offers a practical means to improve diagnostic reliability when samples cannot be transported under ideal temperature-controlled conditions.
Read the full abstract on PubMed
Practical Takeaways
- •Magnetic Nanotrap particles could enable reliable field diagnosis of VEEV by stabilizing virus in blood samples during transport without refrigeration, reducing logistical constraints for remote equine disease testing
- •This technology allows samples to maintain diagnostic quality at ambient and elevated temperatures for up to 72 hours, making it practical for equine facilities in warm climates or areas with limited cold-chain infrastructure
- •Implementation could accelerate diagnosis of Venezuelan equine encephalitis in horses during outbreak situations where rapid identification is critical for quarantine and control measures
Key Findings
- •Magnetic Nanotrap particles preserved detectable infectious VEEV in blood at elevated temperatures (40°C) and prolonged storage (72 hours) equal to or greater than untreated samples
- •Viral RNA detection increased significantly with Nanotrap treatment at 72 hours and 40°C conditions
- •VEEV capsid protein detection was enhanced with Nanotrap particles up to 72 hours at 40°C, with untreated samples showing undetectable levels
- •Nanotrap particles successfully increased VEEV capsid detection in mouse blood samples incubated at 40°C for 72 hours, demonstrating in vivo applicability