Abstract: An Infectious Bursal Disease Virus of the Delaware Variant E type having the characteristics of being able to grow on both VERO cells and CEF cells, reacting with monoclonal antibody BK9 produced by the cell line having ATCC deposit number HB-10157, not causing bursal atrophy after vaccination and not spreading to birds in physical proximity to immunized birds, said virus being identified as Delaware Variant E 89-03.

Abstract: New purified and isolated bovine coronavirus (BCV) types (II and III) are described which can be used to create new modified live vaccines for administration to cattle in order to confer immunity against virulent wild-type bovine coronavirus infection. Preferably, a multivalent modified live vaccine is provided for oral-nasal administration which includes the known Type I virus and the new Types II and III virus. Hygromycin B has also demonstrated to be effective for suppressing BCV replication and thus can be administered to cattle as a treatment for the chronic disease and to suppress shedding of BCV in cattle feces.

Abstract: There is described a novel virus which is the causative agent of fish pancreatic disease, which is a serious disease affecting Atlantic salmon. A method of isolating the virus through co-cultivation of infected tissues following by passage is described and an isolated strain of the virus has been deposited.The use of the virus, or proteins or polypeptide derived therefrom as a vaccine or in diagnosis is described, together with genetically engineered constructs.

Abstract: A method for preventing canine coronavirus in dogs is disclosed which comprises administering to a dog a live or inactivated vaccine prepared from transmissible gastroenteritis virus of swine (a TGEV vaccine). An inactivated vaccine composition for use in such a method and a process for the manufacture of the inactivated vaccine composition are described.

Abstract: The present invention provides vaccine compositions of attenuated respiratory syncytial virus (RSV). More particularly, the attenuated virus may be a derivative of RSV which has been incompletely attenuated by cold-passage or introduction of mutations which produce virus having a temperature sensitive (ts) or cold adapted (ca) phenotype. The invention also provides methods for stimulating the immune system of an individual to induce protection against respiratory syncytial virus by administration of attenuated RSV. The invention also provides pure cultures of attenuated RS virus, wherein the virus has been more completely attenuated by the further derivatization of previously identified incompletely attenuated ts or cp mutants.

Abstract: A system for the generation of live Birnavirus such as infectious bursal disease virus (IBDV), a segmented double-stranded (ds)RNA virus of the Birnavirdae family, using synthetic transcripts derived from cloned DNA has been developed. Independent full-length cDNA clones were constructed which contained the entire coding and non-coding regions of RNA segments A and B of IBDV, respectively. Synthetic RNAs of both segments were produced by in vitro transcription of linearized plasmids with T7 RNA polymerase. Transfection of Vero cells with combined plus-sense transcripts of both segments generated infectious virus as early as 36 hours post-transfection. The development of a reverse genetics system for dsRNA viruses will greatly facilitate studies of the regulation of viral gene expression pathogenesis, and design of a new generation of live and inactivated vaccines.

Abstract: The invention discloses a vaccine and methods for the treatment of porcine reproductive and respiratory syndrome. The vaccine is derived from the viral agent NEB-l-P94, deposited at the American Type Culture Collection under accession number VR-2525.Further, the invention discloses a vaccine virus with phenotypic characteristics which can be distinguished from wild type PRRS virus.

Abstract: HIV-1 does not cause disease in any non-human species. Thus, there is no animal model system to evaluate the efficacy of strategies aimed at preventing or ameliorating disease caused by this virus. The instant invention provides an animal model for HIV-1 induced disease, virus for generating such model animals, and methods for generating pathogenic SHIV.

Abstract: A Marek's disease vaccine comprising an attenuated revertant virus derived as a clone of Md11/75/R2 or an antigenic component of the virus is characterized by a markedly reduced pathogenicity compared to the parent virus, without a comparable loss in immunogenicity. Attenuated revertants of the invention are exemplified by Md11/75/R2/23 and Md11/75/R2/29. These viruses or immunogenic components thereof can be formulated into monovalent and polyvalent vaccines.

Abstract: The invention includes a vaccine and sera for treatment of Mystery Swine Disease (MSD), a method for producing the vaccine, methods for diagnosis of MSD, a viral agent that will mimic "mystery swine disease" and antibodies to the viral agent useful in diagnosis and treatment of MSD. The serum contains mammalian antibodies which are effective in treating MSD.

Abstract: The invention includes a vaccine and sera for treatment of Mystery Swine Disease (MSD), a method for producing the vaccine, methods for diagnosis of MSD, a viral agent that will mimic "mystery swine disease" and antibodies to the viral agent useful in diagnosis and treatment of MSD. The serum contains mammalian antibodies which are effective in treating MSD.

Abstract: A full-length cDNA copy of an attenuated, cell culture-adapted hepatitis-A virus genome has been constructed. The HAV cDNA when inserted, without the oligo (dG) oligo (dC) tails, into an RNA transcription vector yielded a plasmid designated pHAV/7. Transfection of monkey kidney cells with pHAV/7 DNA yielded HAV. Transfection with RNA transcripts produced in vitro from pHAV/7 yielded about 10-fold more HAV than transfection with pHAV/7 DNA. HAV thus produced are useful as a vaccine.

Abstract: A permanent cell line PH2, and a process for replication of rabies viruses which have a cytopathic effect (CPE) is claimed. The process comprises: infecting the PH2 cell line with the virus to be replicated; incubating the cells; and isolating and purifying virus particles after they have reached a sufficiently high titer.

Abstract: Invention relates to a vaccine for the prevention of Infectious Bursal Disease in poultry comprising an effective immunizing amount of a live attenuated intermediately-pathogenic IBD virus belonging to the strain deposited at the ECACC under No. V92052301 (MB), an effective immunizing amount of a live attenuated intermediately-pathogenic IBD virus belonging to the strain deposited at the ECACC under No. V92100106 (MB-2), or an effective immunizing amount of a live attenuated intermediately-pathogenic IBD virus belonging to the strain deposited at the ECACC under No. V92102209 (MB-1).

Abstract: A bovine ovary cell line (FROv), a process for its preparation, and its use for replicating viruses, are described.

Abstract: The present invention is concerned with Marek's Disease Virus of serotype 1 adapted for growth on an avian cell line. A preferred cell line for adaption of this virus is the quail cell line QT-35. These adapted viruses can be grown on the avian cell line in order to obtain virus material for the preparation of vaccines.

Abstract: The invention is concerned with novel Eimeria proteins with immunogenic properties as well as with DNA sequences encoding these proteins. These proteins can be administered to chickens thereby protecting the chickens against coccidiosis. In addition the DNA encoding these proteins can be used for the preparation of a vector vaccine against coccidiosis.

Abstract: Disclosed are live hepatitis A virus deletion mutants having a deletion mutation in the 5' nontranslated region of the viral genome. The deletion mutation may be selected from the group consisting of (a) pY1 deletion mutations that cause the virus to retain the ability to replicate in monkey kidney cells; and (b) deletion mutations between nucleotides 140 and 144 that render the virus temperature sensitive. Advantageously, the deletion mutation may be an attenuating mutation. Pharmaceutical formulations containing such viruses are disclosed, along with the use thereof to produce antibodies useful for diagnostic purposes and for imparting protective immunity against hepatitis A virus.

Abstract: Hepatitis A virus is attenuated in virulence by in vitro passage in susceptible cell cultures, without prior passage in a subhuman primate. This process results in a live, attenuated hepatitis A virus vaccine suitable for human disease prevention.

Abstract: This invention relates to a method and composition for inhibiting or destroying viruses or retroviruses in a mammalian host. The method comprises contacting the viruses or retroviruses with a composition. The composition comprises an active ingredient capable of inhibiting or destroying viruses or retroviruses, for example, a surfactant, and an activating ingredient capable of inhibiting or destroying one or more enzymes associated with viruses or retroviruses, for example, a fluorinated compound capable of releasing fluoride anions, and an excipient.

Abstract: This invention relates to a novel infectious bronchitis virus (IBV) serotype and to attenuated IBV strains derived therefrom, and also to live or inactivated vaccines made using such IB virus.

Abstract: The present invention provides a live and inactivated Chicken Anaemia Agent vaccine capable of evoking an immune response in a vaccinated chicken. The CAA virus of the vaccine is attenuated by serial passages in embryonated eggs.

Abstract: The present invention provides a method of classifying an unclassified live poliovirus vaccine as having an acceptable or unacceptable level of neurovirulence, comprising, prior to vaccine administration, the steps of: a) selectively amplifying a region of an unclassified poliovirus vaccine genome containing a nucleotide position predictive for increased neurovirulence using selectively mismatched primers, whereby a restriction endonuclease site in the selectively amplified region is created by introducing a site-specific mutation into the amplified region; b) digesting an amount of the amplified region with a restriction endonuclease that specifically cleaves the amplified sequences in revertant viruses which contain a reversion at the nucleotide position predictive for increased neurovirulence; c) digesting an amount of the amplified region with a restriction endonuclease that specifically cleaves the amplified sequences in nonrevertant viruses which contain the nucleotide position predictive for increased

Abstract: A thermostable varicella zoster virus (tVZV) is useful for the preparation of a vaccine against chickenpox. The tVZV was selected from a population of virus which survived stringent heat inactivation conditions. The surviving virus is used to provide seed virus to produce a new vaccine with enhanced stability.

Abstract: The present invention provides a vaccine which protects pigs from a virus and/or an infectious agent causing a porcine respiratory and reproductive disease, a method of protecting a pig from a disease caused by a virus and/or an infectious agent which causes a respiratory and reproductive disease, a method of producing a vaccine against a virus and/or an infectious agent causing a porcine reproductive and respiratory disease, and a biologically pure sample of a virus and/or infectious agent associated with a porcine respiratory and reproductive disease, particularly the Iowa strain of porcine reproductive and respiratory syndrome virus (PRRSV), and an isolated polynucleotide which is at least 90% homologous with a polynucleotide obtained from the genome of a virus and/or infectious agent which causes a porcine respiratory and reproductive disease.

Abstract: Disclosed and claimed are nucleotides for genes encoding the canine herpesvirus (CHV) gB, gC and gD homologues. These genes encode polypeptides of 879, 459 and 345 amino acids, respectively, which are also disclosed and claimed. The genes are useful as DNA probes or, for preparing PCR primers. The polypeptides are useful in antigenic, immunological or vaccine compositions. The nucleotides can be expressed in any suitable vector system, allowing for production of the polypeptides. Additionally, the vector system containing any or any combination of the nucleotides can be employed in an antigenic, immunological or vaccine composition, such as a poxvirus vector system, e.g., a CHV-vaccinia or avipox virus recombinant, as can the products from expression, i.e., the gB, gC and gD glycoproteins. Antibodies elicited by the glycoproteins or from expression of the vector containing the nucleotide(s) are also useful. Methods for making and using the composition are also disclosed and claimed.

Abstract: The present invention provides a live and inactivated Chicken Anaemia Agent vaccine capable of evoking an immune response in a vaccinated chicken. The CAA virus of the vaccine is attenuated by serial passages in embryonated eggs.

Abstract: The present invention is concerned with a new strain of Mareks Disease Virus and to a vaccine for the protection of poultry against Mareks Disease containing the novel strain. The invention also relates to bivalent or polyvalent vaccines comprising in addition other viruses of the Mareks Disease virus group, i.e. HVT.

Abstract: A deletion mutant of bovine herpesvirus type 1 which has a deletion in the glycoprotein gE-gene and which may further have a deletion in the thymidine kinase gene and/or the glycoprotein gI-gene, or have an insertion of a heterologous gene is disclosed. Recombinant nucleic acids which encode the gE-gene or a part thereof are also disclosed, in addition to vaccines and a method of treatment.

Abstract: This invention relates to a temperature-sensitive (ts) feline infectious peritonitis (FIP) virus, which is characterized by substantially reduced growth at 39.degree. C. as compared with its growth at 31.degree. C. Also included in this invention is the use of the ts-FIP virus for oral or intranasal administration to cats as a vaccine to induce immunity against FIP.

Abstract: The present invention is directed to bacteriophage therapy, using methods that enable the bacteriophage to delay inactivation by any and all parts of the host defense system (HDS) against foreign objects that would tend to reduce the numbers of bacteriophage and/or the efficiency of those phage at killing the host bacteria in an infection. Disclosed is a method of producing bacteriophage modified for anti-HDS purposes, one method being selection by serial passaging, and the other method being genetic engineering of a bacteriophage, so that the modified bacteriophage will remain active in the body for longer periods of time than the wild-type phage.

Abstract: The present invention refers generally to a novel human cytopathic rotavirus of serotype 3 (HCR3A) and to its use as a vehicle for the expression of human rotavirus genes. The invention also relates to novel rotavirus reassortants, vaccines employing the novel rotavirus and its reassortants and methods for their preparation and administration.

Abstract: A method of producing infectious bursal disease virus comprising culturing infectious bursal disease virus in a mammalian cell line for two to ten days.

Abstract: A process for growing a PRRSV in a tissue culture which is susceptible to infection to replicate the virus to an amount sufficient to protect animals against PRRS or be used in diagnosing PRRS or identifying the molecular structure of PRRSV for development of recombinant products, comprising inoculating the virus onto the tissue culture and harvesting the replicated virus.

Abstract: A vaccine for Marek's disease using mutant strains of a serotype 2 field isolate, designated 471B/1, is disclosed. The mutant viruses, which are produced by serial passage of 471B/1 in cell culture, not only retain effective immunizing ability against Marek's disease virus, but which also exhibit reduced enhancement of lymphoid leukosis in comparison to non-passaged 471B/1 and conventional serotype 2 vaccines. These viruses or immunogenic components thereof can be formulated into monovalent and polyvalent vaccines.

Abstract: The present invention comprises the method of evaluation of the safety of live attenuated vaccines based on detection and measurement of the incidence of genetic changes associated with reversion to virulence in vaccine microorganisms. The method based on PCR and restriction enzyme analysis was developed and used for determination of the proportion of mutants contributing to neurovirulence of type 3 live oral poliovirus vaccine. The correlation between the neurovirulence of OPV lots revealed by the monkey test and the abundance of mutant virus containing cytidine in the position 472 was discovered. The amount of these mutants increases upon passages of the virus in cell cultures at a rate dependent on the cell type, cultivation conditions and the seed virus stock.

Abstract: The invention relates to hepatitis A viruses (HAVs) having a serotype displaying the immunological characteristics of the HAV strain RG-SB XA112 (CNCM I-1080). In particular, the invention relates to the new hepatitis A virus strain RG-SB XA112 (CNCM I-1080). The invention also relates to structural components of said HAVs. Furthermore, the invention relates to processes for the isolation of said HAVs. The HAVs of the present invention and the structural components thereof can be used for the production of vaccines and diagnostic compositions. Finally, the invention relates to polyclonal and monoclonal antibodies which are directed to said new HAVs.

Abstract: Disclosed and claimed are nucleotides for genes encoding the canine herpesvirus (CHV) gB, gC and gD homologues. These genes encode polypeptides of 879, 459 and 345 amino acids, respectively, which are also disclosed. The nucleotides can be expressed in any suitable vector system, allowing for production of the polypeptides. Additionally, the vector system containing any or any combination of the nucleotides can be employed in an antigenic, immunological or vaccine composition, such as a poxvirus vector system, e.g., a CHV-vaccinia or avipox virus recombinant, as can the products from expression, i.e., the gB, gC and gD glycoproteins. Antibodies elicited by the glycoproteins or from expression of the vector containing the nucleotide are also useful. Methods for making and using the composition are also disclosed and claimed.

Abstract: A new virus not neutralized or bound by monoclonal antibodies which are group neutralizing to all IBDV vaccines of current art, and capable of inducing infectious bursal disease in poultry is identified, in essentially pure form. A test kit, and assay for the presence of the virus is disclosed, together with the vaccine incorporating the virus. A monoclonal antibody Mab 50, which neutralizes the virus, form the basis of an alternative vaccine.

Abstract: Hepatitis A virus is attenuated in virulence by in vitro passage in susceptible cell cultures, without prior passage in a subhuman primate. This process results in a live, attenuated hepatitis A virus vaccine suitable for human disease prevention.

Abstract: A process for growing a PRRSV in a tissue culture which is susceptible to infection and replication of PRRSV to an amount sufficient to protect animals against PRRS or be used in diagnosing PRRS or identifying the molecular structure of PRRSV for development of recombinant products, comprising inoculating the PRRSV onto the tissue culture and harvesting the replicated PRRSV.

Abstract: A process for the propagation of hepatitis A virus, which process comprises culturing cells infected with the virus in an aqueous culture medium in which the concentration of sodium chloride is from 30 mM to 170 mM above the isotonic concentration of sodium chloride; and production of a vaccine therefrom.

Abstract: A viral agent that will mimic "mystery swine" disease has been isolated and described, together with a method of growing the viral agent in vitro, and a method of attenuating the virus for vaccine preparation.

Abstract: The present invention relates, in general, to a substantially pure preparation of the simian hepatitis A viral isolate AGM-27; a substantially pure preparation of the genomic DNA of simian hepatitis A viral isolate AGM-27; a pharmaceutical composition comprising the simian hepatitis A viral isolate AGM-27; a method of preventing hepatitis A in an animal; and a vaccine comprising the simian hepatitis A viral isolate AGM-27.

Abstract: A cell line capable of producing SIV viral materials without producing infectious viral particles is disclosed. The SIV viral particles produced are immunogenic and non-infectious. The cell line and the products produced by the cell line are useful for diagnostic purposes and for immunization purposes.

Abstract: A live or inactivated canine corona virus vaccine is provided which is derived from a virus of the novel antigenic type of the canine corona virus strain I-743 (CNCM, Institut Pasteur, Paris). A method for the preparation of this vaccine and the use of said vaccine in protecting susceptible animals against canine corona virus injection are also disclosed.

Abstract: A human T cell clone containing an integrated copy of HIV in a latent state, but inducible to productive replication by an activating agent is provided. The clone of the present invention allows in vitro screening of anti-HIV drugs.

Abstract: This invention relates to a method and composition for inhibiting or destroying viruses or retroviruses in a mammalian host. The method comprises contacting the viruses or retroviruses with a composition. The composition comprises an active ingredient capable of inhibiting or destroying viruses or retroviruses, for example, a surfactant, and an activating ingredient capable of inhibiting or destroying one or more enzymes associated with viruses or retroviruses, for example, a fluorinated compound capable of releasing fluoride anions, and an excipient.

Abstract: An attenuated infectious laryngotracheitis virus (ILT) that has the antigenic and virulence characteristics of ECACC at Accession No. V89042602, produces an average pock diameter on chorio-allantoic membrane of commercial eggs between 1.0 and 3. mm, exhibits substantially reduced virulence in comparison to ILT SA2 strain, and results in substantially less weight loss in poultry as compared to poultry infected with SA2. A method of producing this ILT virus by serially passaging ILT viral strain SA2 in primary cell cultures followed by serial passaging in embryonated eggs. A method for preventing infection by ILT virus in birds by administering a vaccine with an effective amount sufficient to elicit an immune response.

Abstract: The present invention provides a biologically pure culture of a novel pathogenic porcine respiratory coronavirus (PRCV) and a vaccine derived therefrom effective against PRCV infection and transmissible gastroenteritis virus (TGEV) infection.