This invention provides kits, devices, and methods for the detection of antibodies that recognize one or more proteins and/or antigens from porcine reproductive and respiratory syndrome virus (PRRSV). The antibodies may be in a biological fluid of a PRRSV infected or at risk subject. The invention may be advantageously applied to both the diagnosis and prevention of PRRSV infection.

An object of the present invention is to optimize, and to increase the accumulation amount of, GP5 antigen, in order to enhance the performance of a PRRS vaccine. The present invention provides a fusion protein comprising an ectodomain (ectGP5) of Glycoprotein 5 (GP5) of porcine reproductive and respiratory syndrome (PRRS) virus, and an adjuvant protein.

The present invention relates to a kit for detecting a virus, a composition for detecting a virus and a method for detecting a virus. According to the present invention, a kit which is capable of detecting viruses with high efficiency at low cost within a short period of time, and exhibits enhanced sensitivity and accuracy may be provided.

Disclosed are chimeric polypeptides based on viral membrane fusion proteins. More particularly, the present invention discloses chimeric polypeptides that comprise a virion surface exposed portion of a viral fusion protein and a heterologous structure-stabilizing moiety, and to complexes of those chimeric polypeptides. The present invention also discloses the use of these complexes in compositions and methods for eliciting an immune response to a fusion protein of an enveloped virus, or complex of the fusion protein, and/or for treating or preventing an enveloped virus infection. The present invention further discloses the use of the heterologous structure-stabilizing moiety for oligomerizing heterologous molecules of interest.

The present disclosure provides an adjuvant composition containing 0.2%-15% w/v carbomer, 0.1%-0.5% w/v lecithin, and 0.03%-0.2% w/v ginsenoside. The adjuvant composition of the present disclosure cannot only ensure the long-term clarification and/or stability of the vaccine, but also can effectively stimulate the inactivated antigens and subunit antigens therein to produce high-titer antibodies for immune protection. The inactivated vaccines or subunit vaccines prepared by the adjuvant composition of the present disclosure can be used as a diluent for freeze-dried live virus antigens and has no toxic effect on the live virus antigens.

The present invention relates to modified, live Porcine Reproductive and Respiratory Syndrome viruses. Viruses were genetically analyzed and selected based on phylogenetic grouping for modification by repeated passage in tissue culture. The modified, live viruses were assessed for the ability to provide protective immunity to heterologous viruses. The modified, live viruses are useful in vaccines, particularly in vaccines which can treat infection of swine by multiple heterologous viruses.

The invention provides isolated polynucleotide molecules that comprise a DNA sequence encoding an infectious RNA sequence encoding a genetically-modified North American PRRS virus, methods to make it and related polypeptides, polynucleotides, and various components. Vaccines comprising the genetically modified virus and polynucleotides and a diagnostic kit to distinguish between naturally infected and vaccinated animals are also provided.

The present invention relates to a therapy for treating or preventing several diseases in animals, based on the administration of a highly concentrated avian derived immunoglobulins formulation, obtained from the egg yolk from hens previously hiper-immunized with a vaccine formulation comprising infectious agents or toxins antigens, a light mineral oil and a particulate adjuvant.

The present disclosure provides methods and compositions for reducing the incidence, severity, and/or duration of at least one sign of respiratory infection. The methods include the steps of administering a composition comprising gastrointestinal microbiota and an immunogenic composition to an animal in need thereof.

The invention provides isolated polynucleotide molecules that comprise a DNA sequence encoding an infectious RNA sequence encoding a genetically-modified North American PRRS virus, methods to make it and related polypeptides, polynucleotides, and various components. Vaccines comprising the genetically modified virus and polynucleotides and a diagnostic kit to distinguish between naturally infected and vaccinated animals are also provided.