Detection of mink enteritis virus by loop-mediated isothermal amplification (LAMP)

Area of Science:

• Veterinary Virology
• Molecular Diagnostics
• Isothermal Amplification Techniques

Background:

• Mink enteritis virus (MEV) poses a significant threat to mink health.
• Accurate and rapid diagnostic methods are crucial for controlling MEV outbreaks.
• Conventional PCR, while effective, can be time-consuming and require specialized equipment.

Purpose of the Study:

• To evaluate the efficacy of Loop-mediated isothermal amplification (LAMP) for MEV detection.
• To compare the sensitivity and specificity of LAMP with conventional PCR.
• To assess the potential of LAMP as a diagnostic tool for MEV in clinical settings.

Main Methods:

• Development of a LAMP assay targeting the VP2 gene of MEV.
• Optimization of isothermal amplification conditions (65°C, 60 min).
• Comparison of detection limits and cross-reactivity with related viruses (CDV, AMDV) using LAMP and PCR.

Main Results:

• LAMP achieved a detection limit of 10(-1) TCID(50)/ml, significantly more sensitive than PCR (10 TCID(50)/ml).
• No cross-reactivity was observed with canine distemper virus (CDV) or Aleutian mink disease parvovirus (AMDV).
• LAMP identified 84 positive cases out of 230 clinical samples, exceeding the 68 cases detected by PCR.

Conclusions:

• LAMP is a highly sensitive and specific method for detecting MEV.
• The assay provides a rapid and simple alternative to PCR for MEV diagnosis.
• LAMP is particularly suitable for resource-limited laboratories and rural areas for MEV surveillance.