PRRSV is highly mutating, so we consistently monitor PRRSV strains to be sure to offer the most up-to-date PCR solution to enable our customers to work with confidence and detect all strains of concern. The monitoring of circulating European PRRSV strains using sequencing technologies enables the sequencing of RNA directly isolated from field samples. Sequencing approaches offer the possibility to identify new PRRSV strains, increasing the performance of a diagnostic tool for PRRSV detection. The Applied Biosystems VetMAX PRRSV EU & NA assay in development is designed to reinforce the efficacy of PRRSV surveillance programs in the field, with the detection of the four subtypes of the PRRSV European genotype and a diagnostic sensitivity of 99%. Thermo Fisher Scientific offers a range of adapted workflows from sampling, extraction methods to sequencing solutions.
The Applied Biosystems VetMAX PEDV/TGEV/SDCoV kit was developed using various types of environmental and related samples obtained from the field, and found to yield high specificity and sensitivity. To examine its performance relative to competitors’ solutions, we compared it to two comparable kits prominently used in the market. Environmental, oral fluid, and fecal samples infected with PEDV (N=15), TGEV (N=10), and SDCoV(N=14) were obtained from the field, and negative, positive, and no template controls were included in the testing. RT-qPCR for all three manufacturers’ kits were run on the Applied Biosystems 7500 Fast Real-Time PCR System according to the manufacturer’s recommendations. The VetMAX PEDV/TGEV/SDCoV kit consistently showed equivalent or better results to other kits tested, with consistently lower CTs compared to one of the kits and a higher signal versus baseline noise for the other.
Bovine tuberculosis (TB) is a chronic disease affecting cattle, as well as wild animals, and is caused primarily by Mycobacterium bovis. Applied Biosystems™ VetMAX™ M. tuberculosis Complex kit (MTBC), a new molecular tool, allows the simultaneous detection of Mycobacteria belonging to Mycobacterium tuberculosis complex (MTBC) and an internal control. To demonstrate the kit’s performances, verification studies were carried out on cattle and a variety of wild animals.
The USDA-licensed VetMAX™-Gold MAP Detection Kit is a real-time PCR assay for the rapid in vitro detection of MAP DNA purified from bovine feces. The assay targets a unique sequence element in the MAP genome to provide highly sensitive and specific results. The purpose of this study is to determine the performance characteristics of the VetMAX™-Gold MAP Detection Kit in detecting MAP DNA from nucleic acid extracted from individual and pooled bovine fecal samples.
Animal sample matrices used for diagnostic qPCR testing may contain a variety of PCR inhibitors that can potentially lead to false-negative results. In an effort to provide a solution to help diagnose farm animal health issues more accurately, we’ve developed an internal positive control that can be easily integrated into existing TaqMan™-based workflows to test for the presence of PCR inhibitors, thereby lowering the risk of false-negative results.
PRRS is caused by a single stranded positive-sense RNA enveloped virus with a high mutation rate leading to greater heterogeneity of the nucleotide sequence between the individual strains. The high genetic virus diversity increases the risk of reduced sensitivity for real-time RT PCR diagnostic tool. The aim of the present study was to monitor circulating PRRSV strain throughout Europe using capillary ORF7 sequencing and NGS technology.
The prevalence of bovine trichomoniasis in Mexico and particularly in the state of Chihuahua is unknown, since no diagnostic testing has been implemented extensively. Therefore, the aim of this study was to estimate the prevalence of trichomoniasis in beef bulls in the state of Chihuahua with a molecular diagnostic test based on real-time PCR: the VetMAX™-Gold Trich Detection Kit with a United States Department of Agriculture (USDA) license.
Development and validation of a complete workflow solution for SIV testing
We have validated an SIV testing workflow consisting of high-throughput nucleic acid purification, SIV detection, and SIV subtyping from porcine nasal swab samples. SIV can be detected using the USDA-licensed VetMAX™-Gold SIV Detection Kit, a single-tube, one-step real-time RT-PCR kit for rapid and accurate screening for influenza A. The assay targets three independent regions of the SIV genome to dramatically limit the number of false-negatives due to mutation of the viral genome.
Earlier and easier diagnostic tools for herd management of PRRSV: Comparison of sampling and prevalence under field conditions
The main goals of several studies were to validate oral fluid against blood/serum and tissue sampling methods and also to establish a recommendation for oral fluid sampling under field conditions for an earlier diagnostic of PRRSV with an easier sampling method. Thermo Fisher Scientific asked several laboratories and research institutes throughout the world to evaluate the real-time PCR tools on over 800 field samples of different genotypes. Field studies in Europe and North America allowed evaluation of the kit’s performance on oral fluid samples.
New insights into oral fluids as a diagnosis procedure to detect and determine the prevalence of PRRSV under field conditions
Based on experimentation with European and North American strains of porcine reproductive and respiratory syndrome virus (PRRSV), the probability of detecting PRRSV in oral fluids is significantly associated with PRRSV prevalence in serum (p<0.0001). If the serum prevalence is higher than 50%, the probability of detecting this virus in oral fluid samples is close to 1. Therefore, oral fluid sampling is a good tool for detecting PRRSV at herd level, but it is not suitable for determining the prevalence of this disease.
Development and validation of a new African swine fever real-time PCR kit
African swine fever virus (ASFV) is a notifiable, highly contagious disease that can cause significant economic losses. As there is still no vaccine or treatment available, monitoring ASFV by means of diagnosis is the only way to control it, and is of utmost importance. A new duplex real-time PCR kit that targets the p72 gene and an internal control has been developed, and its performance for diagnosis of ASFV has been assessed.
Why the standardization of Trich regulations and laboratory testing methods across state lines is important for beef producers
Dr. Kathy Simmons, Chief Veterinarian, National Cattlemen's Beef Association, Washington DC. Harmonized state trich regulations for the interstate movement of cattle would facilitate cattle movement at the speed of commerce. Well-defined, thoughtful and mutually accepted testing procedures for trich between adjoining states could eliminate redundant testing procedures and reduce the danger to animals and handlers from repeated or unnecessary testing.*
How the state of Kansas moved from no Trich regulations to implementing current working Trich regulations and accepted diagnostic testing methods
Dr. Bill Brown, Animal Health Commissioner, Kansas Department of Agriculture, Topeka Kansas. Overview of Kansas' enactment of new, more comprehensive trich regulations for the intrastate change of ownership and interstate movement and diagnostic testing of cattle. Dr. Brown appointed a trich working group comprised of four veterinarians and four beef producers to spearhead the evaluation in improving the management of trich in the state of Kansas.*
Why standardization of both state Trich regulations and laboratory testing procedures benefit veterinarians and their beef producer clients
Dr. Jeremy VanBoening - Republican Valley Medical Center, Alma / Holbrook / Franklin Nebraska. Dr. VanBoening has discovered great variability in recommended sample-handling protocols among state diagnostic labs. Labs varied on whether or not samples needed to be incubated, whether or not to put on ice, how the samples are shipped and the labs’ preferred collection media. Standardizing lab recommendations for sample collection and handling would improve the quality of samples submitted for testing.*
Development of an Influenza A Sequencing Workflow on Ion PGM™ Sequencer for Improved Surveillance
Complete genome sequencing is crucial for ongoing identification, surveillance and characterization of Influenza A. When sequencing viral genomes, background host nucleic acids may be co-processed during library preparation resulting in a sequencing reaction in which a majority of reads are taken up by the host genome. One solution to this problem is to run a pre-amplification
Influenza A virus detection from oral fluid and nasal swabs in IAV
The detection of IAV in swine populations using nasal swab specimens is labor intensive and relatively insensitive in non-febrile pigs (1). As an alternative, oral fluid samples have been shown to be an excellent surveillance sample for several swine respiratory viruses (2,3,4). The objective of this study was to compare the rate of detection of IAV by RT-PCR, virus isolation (VI), and the VetScan® (Abaxis Inc.).
Correlation between a commercial real-time PCR assay and HEYM culture for MAP in bovine faecal samples
Disease control programmes for Mycobacterium avium subspecies paratuberculosis (MAP) rely on accurate and sensitive tools for the detection of infected animals. Culture based detection of MAP takes many weeks whereas PCR enables rapid detection. Several commercial and many user designed real-time PCR assays exist for the detection of MAP in bovine faecal samples.
Establishment of Presumptive Diagnostic Cut-Off for Persistently Infected Cattle
Bovine Viral Diarrhea Virus causes infection in cattle that has led to major economic losses in both the beef and dairy industries. In utero BVDV infection can induce immunotolerance, causing animals to be persistently infected (PI) for life. PI animals continuously shed the virus and are the main source of BVDV infection in herds.Animals that are acutely or transiently infected will pass the disease and will show
Pooling of Tritrichomonas foetus Cultured Samples Followed by MagMAX™ Sample Preparation System and Amplification with Applied Biosystems qPCR Reagents
The objectives of this study were 1) to compare multiple sample preparation workflows (boiling, QIAGEN, MagMAX™) and real-time PCR assays currently used by diagnostic testing labs with MagMAX™ and Applied Biosystems VetMAX™reagents for individual T. foetus testing, and (2) to assess the feasibility of.
Standardized Sample Preparation For Multiple Sample Matrices
There are many different methods to process different sample matrices. This can lead to confusion and frustration for researchers working with multiple sample types. This abstract describes the MagMAX™ Pathogen RNA/DNA kit which is designed to achieve a more standardized solution so labs can order just one kit for a variety of sample matrices as well as different input volumes for each sample. This will allow labs to work.
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