{"id":18122,"date":"2026-05-21T09:16:42","date_gmt":"2026-05-21T02:16:42","guid":{"rendered":"https:\/\/www.vietstock.org\/?p=18122"},"modified":"2026-05-19T14:21:10","modified_gmt":"2026-05-19T07:21:10","slug":"on-site-pcr-for-farms","status":"publish","type":"post","link":"https:\/\/www.vietstock.org\/en\/industry-news\/on-site-pcr-for-farms\/","title":{"rendered":"On-Site PCR for Farms: Devices, Accuracy and Costs"},"content":{"rendered":"

On-Site PCR in 90 Minutes: Portable Devices, Accuracy, and Real-World Costs<\/b><\/h1>\n
\"Pigs
Pigs in the barn at the concentrated livestock farm.<\/figcaption><\/figure>\n

When a pig on a farm shows abnormal symptoms, the waiting time for test results can directly affect disease-control decisions. Sending samples to a traditional laboratory can take around 24\u201372 hours to receive results, depending on transport distance, sample intake procedures, the type of test, and the laboratory\u2019s working schedule.<\/span><\/p>\n

This is why on-site PCR, also known as point-of-care molecular testing, is gaining attention as a supporting tool in livestock disease management. This technology does not completely replace official laboratories, but it can help farms obtain information more quickly in the early stage of a suspected outbreak.<\/span><\/p>\n

What is on-site PCR, and why do livestock farms need this technology?<\/b><\/h2>\n

The core difference between portable PCR on farms and traditional laboratory PCR<\/b><\/h3>\n

PCR, short for Polymerase Chain Reaction, is a technique that amplifies genetic material to detect the presence of pathogens. For pathogens whose genetic material is DNA, PCR can directly amplify the target DNA segment. For pathogens whose genetic material is RNA, the process usually requires a reverse transcription step to convert RNA into cDNA before amplification. This is commonly known as RT-PCR or RT-qPCR.<\/span><\/p>\n

In a traditional laboratory, this process usually requires fixed equipment, a suitable working space, cross-contamination control procedures, and highly trained technicians. Samples need to be transported, registered, processed according to laboratory protocols, and returned through a reporting system.<\/span><\/p>\n

Portable PCR \u2014 or on-site PCR testing \u2014 refers to a group of devices designed to shorten the time from sample collection to results, serving situations where fast decisions are needed on site or near the farm. The device can be placed in the farm\u2019s technical area, a mobile testing vehicle, or a satellite laboratory.<\/span><\/p>\n

Depending on the device type, portable PCR may be a closed cartridge-based system that integrates multiple sample-processing steps, or it may only be an amplification\/signal-detection device that needs to be combined with a separate nucleic acid extraction step. Therefore, not every portable PCR device should be understood as a simple \u201csample-in, result-out\u201d system. The actual workflow depends on the machine, kit, sample type, level of automation, and operator skill.<\/span><\/p>\n

With some current systems, instrument run time can be shortened to around 30\u201390 minutes. However, the total time from sample collection to results may be longer when sample collection, sample processing, extraction, reaction preparation, and post-test decontamination are included.<\/span><\/p>\n

Why do results within a few hours matter in livestock farming?<\/b><\/h3>\n

In industrial livestock farming, the speed of pathogen detection directly affects disease-control decisions: isolating suspected areas, pausing animal sales or animal shipments, strengthening disinfection, calling a veterinarian, sending samples for confirmation, or activating emergency response procedures.<\/span><\/p>\n

If test results arrive too late, farms may have to make decisions based on clinical observation and experience, or delay their response while waiting for results. Both situations carry risks: responding too slowly may allow the disease to spread, while responding too aggressively without sufficient evidence may create unnecessary costs.<\/span><\/p>\n

The ability of some portable PCR\/RT-PCR or iiPCR devices to return results within the same testing session creates an opportunity for veterinarians or farm managers to obtain earlier data. However, these results should be viewed as initial supporting information, especially for dangerous diseases that require confirmation by an accredited laboratory or a laboratory designated by the competent authority.<\/span><\/p>\n

Comparing portable PCR, laboratory PCR, and other rapid diagnostic methods<\/b><\/h2>\n

Comparison table: time to result, accuracy, cost per test, and staffing requirements<\/b><\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
Criteria<\/b><\/td>\nTraditional laboratory PCR<\/b><\/td>\nOn-site portable PCR<\/b><\/td>\nRapid antigen test<\/b><\/td>\n<\/tr>\n
Time to result<\/span><\/td>\nUsually around 24\u201372 hours, depending on transport and laboratory workflow<\/span><\/td>\nMay be around 45\u201390 minutes or longer, depending on the machine, kit, and sample-processing workflow<\/span><\/td>\nUsually around 15\u201330 minutes<\/span><\/td>\n<\/tr>\n
Sensitivity<\/span><\/td>\nVery high if sample quality is good and the procedure follows proper standards<\/span><\/td>\nCan be high, but depends on the device, kit, sample type, and operating conditions<\/span><\/td>\nUsually lower than molecular testing, especially when pathogen load is low<\/span><\/td>\n<\/tr>\n
Specificity<\/span><\/td>\nVery high if the assay has been well validated<\/span><\/td>\nCan be high, but specific validation data for each assay should be reviewed<\/span><\/td>\nCan be good with some kits, but caution is still needed in situations that require confirmation<\/span><\/td>\n<\/tr>\n
Cost per test<\/span><\/td>\nLow to moderate when sending large sample volumes or using appropriate pooled samples<\/span><\/td>\nModerate to high due to specialized kits and device operating costs<\/span><\/td>\nLower, suitable for rapid screening in certain situations<\/span><\/td>\n<\/tr>\n
Equipment requirements<\/span><\/td>\nFixed laboratory, standard equipment, and quality-control procedures<\/span><\/td>\nPortable or compact device, power supply\/battery, suitable kit, and correct operating procedure<\/span><\/td>\nNo machine required, or only a simple reader depending on the kit<\/span><\/td>\n<\/tr>\n
Staffing requirements<\/span><\/td>\nTrained laboratory technicians<\/span><\/td>\nOperators need training; result interpretation should be supported by a veterinarian or technical specialist<\/span><\/td>\nEasier to perform, but users still need to understand the test\u2019s limitations<\/span><\/td>\n<\/tr>\n
Ability to detect specific pathogens<\/span><\/td>\nYes, if a suitable assay is available<\/span><\/td>\nYes, if a suitable kit\/assay is available<\/span><\/td>\nCan detect the target antigen of a specific pathogen, but does not replace PCR in situations requiring confirmation<\/span><\/td>\n<\/tr>\n
Legal validity<\/span><\/td>\nMay be used for official procedures if performed by an accredited\/designated laboratory<\/span><\/td>\nMainly for screening or supporting initial decision-making, depending on regulations and the organization operating the test<\/span><\/td>\nMainly supports screening and should not be used alone for major decisions<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Note: The sensitivity, specificity, time-to-result, and cost indicators in the table are for general guidance. When evaluating an investment, farms should ask suppliers for specific validation data for each disease, kit, sample type, and real operating conditions.<\/span><\/p>\n

When is on-site PCR more suitable than sending samples to a laboratory, and when is it not?<\/b><\/h3>\n
\"The
The veterinarian is checking the condition of the piglets<\/figcaption><\/figure>\n

Portable PCR is most suitable in the following situations:<\/span><\/p>\n

    \n
  • The farm is monitoring a suspected case and needs quick data to decide whether to isolate the area temporarily.<\/span><\/li>\n
  • The farm is geographically far from a laboratory, making sample transport time-consuming.<\/span><\/li>\n
  • The farm needs rapid screening for breeding herds, newly introduced animals, or high-risk animal groups.<\/span><\/li>\n
  • A large-scale farm has a high enough testing frequency to operate the device regularly.<\/span><\/li>\n
  • The farm has a veterinarian or trained technical staff who can collect samples, operate the machine, and read results.<\/span><\/li>\n<\/ul>\n

    Portable PCR is not suitable, or should not be used as a replacement for laboratory testing, in the following cases:<\/span><\/p>\n

      \n
    • Legal confirmation is required for disease declaration, culling, compensation, or official disease-control measures.<\/span><\/li>\n
    • Genetic sequencing is needed to identify the strain, variant, or source of infection.<\/span><\/li>\n
    • The farm does not have stable technical personnel.<\/span><\/li>\n
    • Testing frequency is too low, making it difficult to recover the cost of the device and kits.<\/span><\/li>\n
    • There is no stable kit supply, or it is unclear whether the kit is permitted for local use.<\/span><\/li>\n<\/ul>\n

      In situations requiring official confirmation, portable PCR should serve as an initial screening tool. Positive or suspected samples still need to be sent to an accredited or designated laboratory according to the guidance of veterinary authorities.<\/span><\/p>\n

      Common groups of portable PCR devices for livestock farming and the situation in Vietnam<\/b><\/h2>\n

      Technical features to check before choosing a device<\/b><\/h3>\n

      Some groups of devices commonly mentioned in on-site or near-site molecular testing include:<\/span><\/p>\n

      Closed cartridge-based systems<\/b><\/h3>\n

      This device group has the advantage of simplifying operation, reducing the risk of cross-contamination, and being suitable for operators who receive short-term training. Users usually load the sample, or the processed sample, into the cartridge, after which the machine performs the remaining steps according to the designed workflow.<\/span><\/p>\n

      However, the test\/kit portfolio depends heavily on the manufacturer and the markets where the device or kit is approved. It should not be assumed that a well-known cartridge-based system in human healthcare will have suitable veterinary kits available for livestock farming. Before investing, farms need to clearly confirm with the manufacturer or distributor regarding the assay\/kit, supported sample types, validation data, and legal scope of use in Vietnam.<\/span><\/p>\n

      Compact real-time PCR or open-platform systems<\/b><\/h3>\n

      This group is more suitable for fixed laboratories, satellite laboratories, or mobile testing vehicles with stable operating conditions. Its advantage is greater flexibility in kit selection, and it may use different assays if they have been properly validated. The drawback is that operation is usually more complex, may require manual master mix preparation, and requires operators with a molecular biology background.<\/span><\/p>\n

      Compact systems should not be understood as handheld devices used directly inside barns. They still require a clean working area, cross-contamination control, and a stable power supply.<\/span><\/p>\n

      iiPCR and other field molecular testing systems such as POCKIT<\/b><\/h3>\n

      Some systems, such as POCKIT\/POCKIT Micro, are designed for field testing and are based on iiPCR technology. This group has the advantages of easy operation, fast instrument run time, and potential suitability for veterinary, aquaculture, and agricultural applications.<\/span><\/p>\n

      However, the total time from sample collection to results still depends on the extraction step, sample type, and kit workflow. The availability of kits for ASF, PRRS, avian influenza, or other diseases should be confirmed with the manufacturer or distributor in Vietnam.<\/span><\/p>\n

      Handheld devices connected to a phone or tablet<\/b><\/h3>\n

      This group is suitable for rapid field surveys or mobile service models. Its advantages are light weight, flexibility, and easy mobility. Its drawbacks are often low sample throughput, dependence on specialized kits, and limited suitability when farms need to test a large number of samples within a short time.<\/span><\/p>\n

      Suppliers, warranty conditions, and after-sales technical support in Vietnam<\/b><\/h3>\n

      In Vietnam, portable PCR devices in the veterinary field are often imported and distributed through scientific equipment companies, medical device suppliers, molecular biology companies, or businesses specializing in livestock and veterinary solutions. When considering a purchase, farms should not compare only the initial machine price. They should carefully ask about the following factors:<\/span><\/p>\n

        \n
      • Does the device support the exact disease that needs to be tested?<\/span><\/li>\n
      • Are kits available in Vietnam, or must they be imported batch by batch?<\/span><\/li>\n
      • Does the kit have validation data for the intended sample type and disease?<\/span><\/li>\n
      • Does the distributor provide training on sample collection, operation, and troubleshooting?<\/span><\/li>\n
      • Are calibration, maintenance, and spare-parts replacement services available in Vietnam?<\/span><\/li>\n
      • What are the specific warranty conditions?<\/span><\/li>\n
      • Is the device suitable for the farm\u2019s power supply, temperature, humidity, and operating environment?<\/span><\/li>\n
      • Can results from the device be used for official purposes, or only for internal screening?<\/span><\/li>\n<\/ul>\n

        Kits are critical consumables. If the supplier cannot maintain a stable kit supply, the device may experience interruptions in use even if the machine itself is still functioning well.<\/span><\/p>\n

        Accuracy of portable PCR in livestock disease diagnosis: reference information<\/b><\/h2>\n

        \"pipettor<\/p>\n

        How should sensitivity and specificity be understood?<\/b><\/h3>\n

        The accuracy of portable PCR should not be evaluated using one general number for all machines and all diseases. Indicators such as sensitivity and specificity depend on many factors:<\/span><\/p>\n

          \n
        • Device type<\/span><\/li>\n
        • Kit\/assay type<\/span><\/li>\n
        • Sample type: blood, serum, nasal or tracheal fluid\/swabs, feces, and tissue<\/span><\/li>\n
        • Disease stage at the time of sampling<\/span><\/li>\n
        • Pathogen load<\/span><\/li>\n
        • Sample storage quality<\/span><\/li>\n
        • Skill of the sample collector and device operator<\/span><\/li>\n
        • Cross-contamination control conditions<\/span><\/li>\n
        • Result interpretation thresholds set by the manufacturer<\/span><\/li>\n<\/ul>\n

          Some studies on ASF show that portable PCR\/iiPCR devices can achieve performance close to reference testing under research conditions. However, results from one study on one disease should not be applied to every device, every kit, and every farm condition.<\/span><\/p>\n

          Therefore, a safer way to phrase the issue is: portable PCR can achieve high accuracy if it has been well validated and is operated according to the correct procedure, but farms need to request specific validation data for the device and kit they plan to use.<\/span><\/p>\n

          Factors that cause false negatives and false positives<\/b><\/h3>\n

          A sample collected too early, when pathogen load is not yet high enough, may return a negative result even though the animal is in the early stage of disease. Samples that degrade due to incorrect storage temperature, incorrect sampling location, or improper transport can also reduce result reliability.<\/span><\/p>\n

          On the other hand, false positives may occur if samples are cross-contaminated during sample collection, tube opening, sample loading, or post-test handling. In a barn environment, the risk of cross-contamination is higher than in a laboratory if there is no clear SOP.<\/span><\/p>\n

          Therefore, portable PCR results need to be interpreted in the clinical, epidemiological, and sampling context. A positive result for a dangerous disease should not be used alone to make legal decisions without confirmation from a competent veterinary authority or professional body.<\/span><\/p>\n

          Practical application in Vietnam: initial observations and limitations that need clarification<\/b><\/h3>\n

          In Vietnam, rapid molecular testing and on-site PCR\/iiPCR have attracted attention in the context of controlling dangerous diseases such as African swine fever. However, the actual level of deployment at commercial farms, application scale, operating effectiveness, and legal value of results need to be confirmed through official reports or information from professional authorities.<\/span><\/p>\n

          In practice, portable PCR should be viewed as a screening tool or as support for internal decision-making in the early stage. When there is a positive or suspected result for a dangerous disease, farms still need to report to the local veterinary authority and send samples to an accredited or designated laboratory for confirmation according to current legal requirements.<\/span><\/p>\n

          If official data are needed on disease lists, reporting procedures, or the legal value of test results, livestock producers should contact the Department of Livestock Production & Animal Health, Ministry of Agriculture and Environment, or the local livestock and veterinary management authority.<\/span><\/p>\n

          Real-world costs and ROI calculation when investing in portable PCR for farms<\/b><\/h2>\n
          \"Consultants
          Consultants exchange cattle management data and financial advice with farmers.<\/figcaption><\/figure>\n

          Device price, test kit costs, and annual operating costs<\/b><\/h3>\n

          The cost of portable PCR devices varies widely depending on device model, number of modules, sample throughput, level of automation, import policy, warranty, training, and included technical services.<\/span><\/p>\n

          Some handheld or compact field devices may require lower investment than closed cartridge-based systems or compact real-time PCR systems. However, specific prices vary by supplier and timing. Therefore, any figures in this article should be treated as reference estimates only, not official quotations.<\/span><\/p>\n

          In addition to the machine price, test kit cost is a decisive factor in long-term operating costs. Depending on the disease, manufacturer, purchase quantity, and distribution policy, the cost per sample can vary significantly. Some specialized kits may cost more than sending samples to a laboratory when testing in large volumes, but in return they provide faster results and support on-site decision-making.<\/span><\/p>\n

          Annual operating costs may include:<\/span><\/p>\n