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30 results about "Bird flu (avian influenza)" patented technology

A viral infection that spreads among birds, and rarely affects humans.

Gene engineering antibody of human source neutrality for anti virus H5N1 of bird flu

This invention provides a human-derived genetic engineering antibody that can specifically bond avian influenza virus H5N1. The genetic engineering antibody is derived from antibody gene library of avian influenza virus H5N1 patients in convalescence. The recombinant antibody is decided by hypervariable region (CDRs) specific gene sequence in the antibody light chain and heavy chain gene variable region, and is effectively expressed in procaryotic cells and eukaryotic cells. The recombinant antibody is a functional neutralizing antibody can specifically bond avian influenza virus haemagglutinin protein HA. Part or all genes of the antibody in CDR can modify and produce genetic engineering antibodies with different forms in procaryotic cells, yeast, insects and eukaryotic cells, and can prevent and treat diseases related to avian influenza virus H5N1.
Owner:中国疾病预防控制中心病毒病预防控制所

Recombined newcastle disease virus LaSota attenuated vaccine strain for expressing avian influenza virus H9 subtype HA protein

The invention relates to a recombinant newcastle pestilence LaSota HCLV expressing the bird flu virus H9 subtype hemagglutinin (HA) protein, in particular the recombinant newcastle pestilence LaSota is rL-H9HA. The invention further discloses a method for preparing the recombinant newcastle pestilence LaSota HCLV and the application of the HCLV in preparing a bivalent vaccine for preventing bird flu and newcastle pestilence.
Owner:HARBIN VETERINARY RES INST CHINESE ACADEMY OF AGRI SCI

Triple rapid detection kit of three avian respiratory diseases, and application thereof

The invention belongs to the field of infectious disease detection of animals, and concretely relates to a triple rapid detection kit of three avian respiratory diseases, and an application thereof. The kit comprises a test paper strip, a test card shell and a sample dilution, and the test paper strip is formed by sequentially pasting an absorbing pad, a cellulose nitrate membrane, a colloidal-gold pad and a sample pad on a non-absorbent support slice; a combination pad is coated with an anti-avian influenza virus monoclonal antibody-colloidal gold marker, an anti-Newcastle disease virus monoclonal antibody-colloidal gold marker and an anti-chicken infectious bronchitis virus monoclonal antibody-colloidal gold marker mixture, detection lines T1, T2 and T3 are coated with the anti-avian influenza monoclonal antibody, the anti-Newcastle disease virus monoclonal antibody and the chicken infectious bronchitis monoclonal antibody, and the cellulose nitrate membrane is coated with a rabbit anti-rat IgG quality control line. The kit can simultaneously complete the disease cause detection of bird flu H5 type, H9 subtype, Newcastle diseases and chicken infectious bronchitis, and has strong specificity and high sensitivity.
Owner:HUAZHONG AGRI UNIV +1

Construction and application of H9N2-subtype avian influenza virus cell high-yield vaccine strain

The invention belongs to the technical field of animal vaccine preparation and particularly relates to construction and application of an H9N2-subtype avian influenza virus cell high-yield vaccine strain. The cell vaccine strain is prepared through artificially induced mutation screening of an avian influenza isolate and is named H9N2-subtype avian influenza virus W1-HA358 strain, of which an original isolate is A / duck / Hubei / W1 / 2004 (H9N2) strain. The 3rd, 5th and 8th loca of a 3'-terminal of an HA gene non-coding region of the isolate are subjected to artificial site-specific mutagenesis, and a mutation strain is saved through reverse genetic operation, wherein the mutation strain is subjected to passage on an MDCK cell until a stable generation to obtain a high-proliferation-titer virus strain, thereby producing the H9N2-subtype avian influenza virus cell vaccine. The invention solves the problem of instable proliferation of the H9N2-subtype avian influenza on the MDCK cell, and overcomes a defect of shortage of large quantity of chick embryo during outbreak of the avian influenza, thereby increasing preparation efficiency of the vaccine.
Owner:HUAZHONG AGRI UNIV

Preparation method and product of bird flu inactivated vaccine

InactiveCN102266554AOptimize and improve the production processSmall immune side effectsAntiviralsAntibody medical ingredientsImmune effectsAdjuvant
The invention discloses a preparation method of an inactivated bird flu vaccine and its product. The preparation method comprises: preparing a bird flu virus liquid; adding formaldehyde to the bird flu virus liquid to inactivate the virus liquid; adding an adjuvant to the inactivated virus liquid , emulsified, and obtained; wherein, before adding the adjuvant to the inactivated virus liquid, the virus liquid is subjected to the following treatment: the inactivated virus liquid is concentrated, and the concentrated virus liquid is diluted. The present invention aims at the production status of avian influenza inactivated vaccines, optimizes and improves the production process of avian influenza vaccines, does a large number of experiments on the relationship between formaldehyde concentration and immune titer, and uses virus Concentration technology effectively removes formaldehyde residues in vaccine products. Compared with existing avian influenza inactivated vaccines, the method of the present invention effectively removes 75% of formaldehyde residues in vaccine products, and the prepared avian influenza inactivated vaccines have immunity Small side effects, long storage period, high antibody level and other advantages.
Owner:哈药集团生物疫苗有限公司

Fusion protein sHA1-Fc and application

The invention discloses fusion protein sHA1-Fc and an application. The fusion protein sHA1-Fc of a highly pathogenic AIV (avian influenza virus) H5N1 and a chicken IgY Fc fragment is expressed by a Bacto-Bac expression system, has a molecular structure similar to IgY, and can penetrate a respiratory tract mucosal barrier of a chicken to enter the body under transfer of FcRy expressed in epithelial cells. A sequence of an sHA1-Fc fusion gene is represented as SEQ ID NO:1. The fusion protein is supplemented with a mucosal adjuvant and inoculates the chicken through nasal inhalation, thereby being capable of triggering an organism to generate effective mucosal immunity and triggering systemic immunity of the organism. Therefore, the organism is enabled to obtain anti-AIV local specific immunity and systemic immunity, the immune effect of the fusion protein is better than that of a commercial inactivated virus vaccine, and a new strategy is provided for development of a novel mucosal vaccine for poultry bird flu and other infectious diseases.
Owner:HUAZHONG AGRI UNIV

Separation, identification and application of avian H9N2 subtype avian influenza virus strain

The invention relates to the field of animal virology, and provides separation, identification and application of an avian H9N2 subtype avian influenza virus strain. The H9N2 subtype avian influenza virus strain is preserved in China General Microbiological Culture Collection Center on July 02, 2019 with the preservation number of CGMCC No. 18172. The antigen variation condition of the separated strain is explained from the molecular level; the virus strain is inactivated with formaldehyde, and then is processed together with a 605 adjuvant to prepare an inactivated vaccine, 21-day-old SPF chickens are immunized, the immune effect is evaluated through a serological method and an immune challenge method, it is proved that the strain is good in protection effect, and the strain can be used as an avian influenza H9N2 subtype vaccine candidate strain. The invention provides an idea for bird flu prevention and control, provides technical teaching for bird flu candidate strain screening, andhas great public health significance.
Owner:BEIJING HUAXIA XINGYANG BIOLOGICAL SCI & TECH +1

Chinese medicine feed additive for avian influenza prevention

The present invention discloses a Chinese medicine feed additive for avian influenza prevention, which is characterized in that raw materials of the Chinese medicine feed additive comprise, by weight: 10 to 15 parts of hypericum perforatum, 10 to 15 parts of heartleaf houttuynia herb, 5 to 10 parts of folium perillae and 15 to 20 parts of rosa laevigata. According to the present invention, the Chinese medicine feed additive has effects of clearing heat, removing toxicity, fighting bacteria, eliminating inflammation, treating common cold, wind cold, aversion and fever of cold, and enhancing immunity. Adding the Chinese medicine feed additive to poultry feed can effectively prevent poultry from being infected with bird flu virus, and has no potential side effects on people who eat the poultry.
Owner:CENXI FOREIGN TRADE CHICKEN FARM COMPANY

Compound astragalus polysaccharide granule for preventing and treating avian influenza

PendingCN113855729ASolve the problem of preventive medicineOrganic active ingredientsAntiviralsBiotechnologyAngelica Sinensis Root
The invention discloses a compound astragalus polysaccharide granule for preventing and treating avian influenza, which can effectively solve the problem of drug use for avian influenza, and adopts the technical scheme that the compound astragalus polysaccharide granule is prepared from the following raw material drugs in parts by weight: 20-30 parts of astragalus, 10-20 parts of honeysuckle, 15-35 parts of radix isatidis, 10-20 parts of radix achyranthis bidentatae, 10-20 parts of angelica sinensis, 10-30 parts of fructus forsythiae, 20-30 parts of radix ranunculi ternati and 5-15 parts of semen momordicae, and after the raw material drugs are extracted and concentrated by adopting the modern process, and auxiliary materials are added to prepare granules, wherein auxiliary materials are one or mixture of more than two of starch, powdered sugar and dextrin. According to the compound astragalus polysaccharide granule, the raw materials are rich, the price is low, the medication is safe, no irritation or toxic-side effect is generated on poultry, the bird flu prevention and treatment effect on poultry is good, the compound astragalus polysaccharide granule is good in use effect, and is an innovation of traditional Chinese veterinary medicines for preventing and treating avian influenza. Meanwhile, the preparation method is simple, the cost is low, the use is convenient, the prevention effect on the bird flu of poultry is very good, and the compound astragalus polysaccharide granule is suitable for large-scale popularization and application.
Owner:河南纳瑞森生物药业有限公司 +2

A feed feeding device capable of preventing bird flu

The invention relates to the technical field of breeding fodder production, and discloses a fodder feeder capable of preventing avian influenza. The fodder feeder comprises a shell, multiple flow guiding holes are formed in the shell, clamping grooves are formed in the portion, outside the flow guiding holes, of the shell, the flow guiding holes are located in the bottom of the clamping grooves, the edges of the clamping grooves are hinged with clamping plates, a fodder ball against each clamping groove is arranged on the exterior of the shell, a pushing plate matched with each clamping groove is arranged between each fodder ball and the corresponding clamping groove, a medicine liquid ball is arranged in the shell, multiple through holes are formed in the medicine liquid ball, all the through holes are sealed by films, steel wires are arranged in the shell and wrapped with cotton threads, one end of each steel wire is fixed to each film, the other end of each steel wire penetrates the corresponding flow guiding hole and pushing plate and is fixed to the pushing plate, the end, penetrating the corresponding pushing plate, of each steel wire penetrates into the corresponding fodder ball , and the cotton threads are connected between the adjacent steel wires. By means of the fodder feeder, the defect can be overcome that existing fodder needs to be mixed with medicine manually, and medicine efficacy failure is prevented.
Owner:贵州松羽禽业有限公司

Method for detecting bird flu and avian infectious bronchitis viruses in livestock farm

The invention provides a method for detecting bird flu and avian infectious bronchitis viruses in a livestock farm, and relates to the field of biological detection. The method for detecting bird flu and avian infectious bronchitis viruses in the livestock farm comprises the following steps: S1, designing and synthesizing a digital PCR primer probe; S2, selecting and treating a sample; S3, carrying out RT-dPCR process operation; S4, performing a dual RT-dPCR sensitivity experiment; and S5, performing a dual RT-dPCR specificity experiment, wherein the avian influenza virus primer probe group comprises AIV-F, AIV-Probe and AIV-R, and the avian infectious bronchitis virus primer probe group comprises IBV-F, IBV-Probe and IBV-R. By detecting the two pathogens through adoption of the detection method, not only can the detection sensitivity be improved, but also samples with low virus content can be detected, the disease control effect can be accurately controlled, large-scale avian influenza infection is avoided, the economic loss of breeding enterprises is reduced, the detection method can also be used for simultaneously detecting the two pathogens, and therefore, the detection efficiency is obviously improved.
Owner:山东省动物疫病预防与控制中心

Compound astragalus polysaccharide soluble powder for preventing and treating avian influenza

The invention relates to compound astragalus polysaccharide soluble powder for preventing and treating bird flu, which can effectively solve the problem of medicine use for avian influenza, and adopts the technical scheme that the soluble powder is prepared by taking 550-650g of astragalus polysaccharide, 180-220g of achyranthes bidentata polysaccharide, 110-130g of radix ranunculi ternati polysaccharide and 75-85g of semen momordicae cream as raw material medicines and adding auxiliary materials accounting for 3% of the weight of the raw material medicines, wherein the auxiliary material is prepared by uniformly mixing powdered sugar and dextrin according to the weight ratio of 4: 1, crushing, drying at 60 DEG C, and sieving with a 80-mesh sieve. The traditional Chinese veterinary medicine is rich in raw materials, low in price, safe in medication, free of toxic and side effects and good in use effect, and is an innovation of traditional Chinese veterinary medicines for preventing and treating avian influenza.
Owner:河南纳瑞森生物药业有限公司 +2

Method for expressing duck-derived avian influenza virus ns1 protein and application of the method

The present invention relates to a method for expressing the NS1 protein of duck-derived avian influenza virus and the application of the method. The method mainly includes the following steps: (1) construction of Tetrahymena expression vector pD5H8-NS1; (2) Tetrahymena recombinant cells Construction and screening of strains; (3) induced expression and identification of NS1 protein; the application of the NS1 protein expression method of duck-derived avian influenza virus is used in the preparation of avian influenza virus differential diagnosis kit and vaccine preparation, the present invention Tetrahymena expression system is selected as the expression system of duck-derived avian influenza virus NS1 protein, which can efficiently and stably express duck-derived avian influenza virus NS1 protein. The transgenic expression vector pD5H8 used in the Tetrahymena cell expression system selected by the present invention contains high The metallothionein gene MTT5 promoter provides an important guarantee for the high-efficiency expression of foreign genes in Tetrahymena.
Owner:INST OF ANIMAL HUSBANDRY & VETERINARY FUJIAN ACADEMY OF AGRI SCI +1

Chicken feed feeding equipment for preventing bird flu

The invention relates to the technical field of feed production for breeding, and discloses chicken breeding feed for preventing avian influenza. The feed comprises a hollow spherical shell, a strip hole is formed in the shell, the shell is internally provided with a liquid medicine ball, a plurality of through pipes are inserted in the liquid medicine ball in a penetrating mode, one end of each through pipe is located in the liquid medicine ball, a through hole is formed in each through pipe, the other end of each through pipe sequentially penetrates through the liquid medicine ball and the strip hole and extends to the outer side of the shell, each through pipe is sleeved with a sleeve slidingly connected to the interior of the strip hole and connected with a medicine box, each medicinebox includes a straight surface plate and a curved surface plate which are spliced into a hemispherical shape, a medicine cavity communicated with the corresponding through pipe is formed between thecorresponding straight surface plate and the corresponding curved surface plate, the curved surface plates are provided with spraying holes, the straight surface plates are provided with moving parts,the moving parts are connected with plug blocks and fodder balls, the plug blocks can plug the portions communicated with the medicine cavities and the through pipes, the fodder balls are located atthe outer sides of the medicine boxes, and the through pipes are elastic pipes. By means of the chicken breeding feed for preventing the avian influenza, the defect can be overcome that manual medicine mixing is needed for existing feed, and the medicine is prevented from losing efficacy.
Owner:贵州松羽禽业有限公司

Novel antiviral peptide against avian influenza virus h9n2

The present invention relates to recombinant phages carrying fusion peptides that bind to avian influenza virus (AIV). Such phages are useful as diagnostic reagents to replace anti-AIV antibodies because the phages are capable of competing with the latter antibodies for binding sites on the virus. Synthetic peptides with the sequence CNDFRSKTC, either in linear or cyclic conformations, or fusion phages bearing the above said peptides inhibited AIV propagation in embryonated egg as well as in MDCK cell lines. Therefore they may be used as'therapeutic agents to control, to treat and to eradicate bird flu caused by avian influenza virus.
Owner:UNIVERSITI PUTRA MALAYSIA

A kind of preparation method of recombinant baculovirus vaccine for prevention and treatment of avian influenza h5n1

The invention relates to a preparation method of a recombinant baculovirus vaccine for preventing and treating avian influenza H5N1, in particular to an H5N1 virus vaccine strain for expressing avian influenza virus hemagglutinin HA gene and a preparation method thereof. The preparation method concretely comprises the following steps of 1) building pS-ITRs-HA plasmids; 2) converting the pS-ITRs-HA plasmids into E .coli DH10 Bac; 3) transfecting Sf9 insect cells by recombinant baculovirus shuttle vectors; 4) amplifying the recombinant baculovirus. When the recombinant H5N1 virus vaccine strain obtained through preparation is used for performing immunodetection on blood serum of immune chicken; the level of IgG antibodies in the blood serum of the immune chicken can reach 0.966 to the highest degree; the concentrations of IL-2, IL-4 and IFN-gamma can respectively reach 89 .67ng / L, 80 .21ng / L and 64 .24ng / L to the highest degree. The results show that the recombinant baculovirus vaccine can effectively irritate the chicken bodies to simultaneously generate the body fluid immunity and the cell immunity; the dual immunity protection effect is provided for the chicken group; the invention lays the theoretical foundation for the research and development of the avian influenza virus based on the baculovirus.
Owner:HEILONGJIANG UNIV

Avian influenza virus latex agglutination assay kit and its use

The invention discloses a reagent box of latex agglutination which is used for quickly detecting the birds flu virus. Putting the hare birds flu anti-virus nuclein IgG couple to the surface of carboxylation polystyrene latex particles, founding the method to test the latex agglutination of birds flu virus, then supplemented by other match reagents prepared the reagent box of detect the bird flu virus latex agglutination. the reagent box of detect the bird flu virus latex agglutination is composed of box body and latex diagnostic reagents, sample handling liquid of A which is located in box, sample handling liquid of B, positive contrast sample and negative contrast sample. The reagent box is referred directly detect the birds flu virus, its notable advantages are that strong specificity, high sensitivity, simple operation and rapid diagnosis.
Owner:WUHAN KEQIAN BIOLOGY CO LTD
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