No More Cold Chain Headaches: Freeze-Dried Formats Simplify Pet Molecular Testing

Cold-chain shipping and storage add cost and complexity to molecular diagnostics. Liquid reagents containing DNA polymerases, reverse transcriptases, and other active ingredients typically need to be kept near −20°C. Ice packs or dry ice increase shipping costs, while temperature fluctuations can cause repeated freeze–thaw cycles that compromise reagent performance and shelf life.

This challenge hits veterinary medicine especially hard, as the industry continues shifting toward smaller, distributed clinics. Roughly 78% of veterinary practices have fewer than five practicing veterinarians, and 67% are located in second-tier or smaller cities. For these lean, small-footprint operations, cold-chain dependencies, shelf-life limits, and complicated workflows stand as the biggest real-world barriers to bringing molecular diagnostics to more pets.

How Lyophilization Simplifies the Workflow

Lyophilization, or vacuum freeze-drying, converts liquid reaction mixes into dried cakes or microbeads that are ready to use after reconstitution. Room-temperature storage and shipping make these formats suitable for on-site testing and help control operating costs. They are well suited to point-of-care testing (POCT) and other molecular diagnostic formats.

YEASEN offers a complete solution, from glycerol-free enzymes and lyoprotectants to lyophilization-ready qPCR and RT-qPCR premixes. Support covers raw material selection, formulation optimization, and process implementation.

Performance depends on the protective formulation and the freeze-drying process. In addition to premixes and glycerol-free enzyme raw materials, YEASEN provides customized formulations and reference lyophilization processes. Its IVD Research Development Center (IVD RDC) works with diagnostic developers on research and process development to address technical challenges and accelerate commercialization.

Several lyophilized formats are available, with support for custom consumables.

qPCR Microbeads: Stable for 1 Year Under Ambient Storage

Hieff Unicon™ Lyo-Ready I TaqMan Multiplex qPCR Mix (Cat. No. 11893) uses a new-generation, dual-antibody hot-start Taq polymerase and includes a lyoprotectant, allowing direct lyophilization.

Lyophilized microbeads stored at 25°C for 12 months were reconstituted with 20 µL of nuclease-free water and compared with liquid 11893 reagent that was still within its shelf life. Both formulations were tested with 5 µL of African swine fever virus (ASFV) plasmid. Amplification performance was comparable, and all reactions detected the low-input sample at 5.6 copies per test. These results support one year of room-temperature stability for the tested qPCR microbeads.

Figure 1. Room-temperature stability of lyophilized qPCR microbeads.

Blue curves: microbeads stored at 25°C for 12 months. Red curves: liquid reagent within its shelf life.

Ready for Multiplex RNA Detection in Clinical Samples

Hifair™ Lyo-Ready I Multiplex One Step RT-qPCR Kit (UDG plus, Cat. No. 16645) is designed for one-step multiplex detection of RNA pathogens. After primer–probe incorporation, the formulation retained performance following 30 days of accelerated stability testing at 50°C.

In a three-target feline pathogen assay using 25 clinical samples—15 anal swabs and 10 fecal samples—the article reports favorable overall Ct and fluorescence performance for YEASEN 16645 compared with a competing reagent. The amplification curves for anal swab sample 10 are shown below.

Figure 2. Amplification curves for anal swab sample 10 tested with YEASEN 16645 and supplier A*(reference reagent).

Making Molecular Testing More Accessible to Veterinary Clinics

Room-temperature stability and simple reconstitution can make molecular testing more accessible to small veterinary clinics without cold-chain storage or a dedicated laboratory. YEASEN’s lyophilization solutions aim to make testing simpler, more stable, and more widely available. Diagnostic kit developers and manufacturers can contact YEASEN for a complete solution.

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