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Effects of swab materials and transport media on Aujeszky's disease virus
Abstract:
The effect of swab materials on the recovery of Aujeszky's disease virus from various transport media held at 4 degrees C was investigated over a five day period. No significant loss in infectivity was found in control preparations, approximately 50 per cent of infectivity was recovered from fluids containing applicator wire and approximately 10 per cent from fluids containing polyester fibre or cotton wool. Virus recovery from fluids containing wooden applicator sticks ranged from no virus recovery in protein free media to from 1 to 10 per cent in protein containing media. Freezing followed by thawing was the most effective of the physical methods used for eluting virus from swab materials.
Insights
Swab material significantly impacts Aujeszky's disease virus recovery. Applicator wire showed the best recovery, while cotton wool and polyester fiber had lower yields. Freezing and thawing effectively eluted the virus from swabs.
Area of Science:
- Veterinary Virology
- Diagnostic Microbiology
Background:
- Aujeszky's disease virus (ADV) poses a significant threat to swine populations.
- Accurate virus detection relies on effective sample collection and transport methods.
Purpose of the Study:
- To evaluate the impact of different swab materials on Aujeszky's disease virus recovery.
- To assess virus stability in various transport media over time.
- To determine optimal elution methods for virus recovery from swabs.
Main Methods:
- Investigated the effect of applicator wire, polyester fiber, and cotton wool swabs on ADV recovery.
- Samples were stored in different transport media at 4°C for five days.
- Compared physical elution methods, including freezing and thawing.
Main Results:
- Applicator wire swabs yielded approximately 50% virus recovery.
- Polyester fiber and cotton wool swabs showed around 10% virus recovery.
- Wooden applicator sticks demonstrated variable recovery (0-10%) depending on media protein content.
- Freezing followed by thawing was the most effective elution technique.
Conclusions:
- Swab material is a critical factor influencing Aujeszky's disease virus diagnostic sensitivity.
- Applicator wire is superior to cotton wool and polyester fiber for ADV sample collection.
- Optimized elution protocols, such as freeze-thaw cycles, are essential for maximizing virus recovery.