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58 results about "Anticoccidial Agents" patented technology

Application of secoisolariciresinol diglucoside in preparation of drug with resistance to eimeria tenella

InactiveCN106176779AGood against Eimeria tenellaThe anti-coccidian effect is obviousOrganic active ingredientsAccessory food factorsAnticoccidial AgentsEmoia loyaltiensis
The invention discloses an application of secoisolariciresinol diglucoside in preparation of a drug with resistance to eimeria tenella. Powder is prepared from the secoisolariciresinol diglucoside and acceptable auxiliary materials, is added to feed and is mixed uniformly, and chickens are fed according to the daily amount of feed; or water-soluble secoisolariciresinol diglucoside powder is prepared from the secoisolariciresinol diglucoside and dissolved in water, and the chickens are fed according to the daily drinking amount. Animal infection experiments prove that the ACI (anti-coccidial index) of the secoisolariciresinol diglucoside can be up to 165 or higher, and the secoisolariciresinol diglucoside has a better eimeria tenella resistant effect. Compared with a conventional anti-coccidial drug, namely, sulfachloropyrazin, the secoisolariciresinol diglucoside has a remarkable eimeria tenella resistant effect. According to the application of the secoisolariciresinol diglucoside, the problem of severe drug tolerance produced through adoption of the anti-coccidial drug in the current breeding industry can be effectively solved, the research and development speed of a new drug can be increased on the basis, and great benefits are provided for green and healthy development of the breeding industry.
Owner:广州市汇鑫动物药业有限公司

Preparation of chicken eimeria tenella strain with EYFP knocked into Et.Actin gene

The invention discloses preparation of a chicken eimeria tenella strain with EYFP knocked into an Et.Actin gene. According to the invention, an FnCas12a protein, crRNA synthesized in vitro and a homologous recombination fragment (an Et.Actin gene containing a P2A-DHFR-EYFP expression cassette) are introduced into chicken eimeria tenella sporozoite by utilizing a Lonza 4D-Nucleofector nuclear transformation instrument, so that the editing of the chicken eimeria tenella is realized. The edited insect strain is screened through pyrimethamine in a chicken body to obtain a high-purity gene edited insect strain. Then, the gene edited insect strain is verified by utilizing PCR and Sanger sequencing technologies, and it is proved that the EYFP successfully marks the Et.Actin gene. After sporozoites of the strain are subjected to cell culture and a chicken is infected, cecum mucosa is taken and smeared to show that the EYFP is expressed in the whole life history of the gene edited strain. The gene editing method can be used for performing fixed-point marking on a chicken coccidiosis gene, and is beneficial to analyzing the function of the coccidiosis gene. The invention also has important significance for research and development of novel anticoccidial drugs and vaccines.
Owner:SHANGHAI VETERINARY RES INST CHINESE ACAD OF AGRI SCI

Chicken E.tenella MA2 gene, vector, recombinant strain, protein, and application thereof

The invention discloses a Chicken E.tenella MA2 (Et MA2) gene, a vector thereof, a recombinant strain thereof, a protein thereof, and an application thereof. The amino acid sequence of the EtMA2 protein is represented by SEQ ID No.2. Or the protein is a protein obtained after the amino acid sequence represented by SEQ ID No.2 is subjected to substitution, deletion, and/or addition of one or more amino acids, and/or a protein with terminal modification and with a same activity. The invention also discloses an EtMA2-outsidedomain protein with an amino acid sequence represented by SEQ ID No.4. Or the protein is a protein obtained after the amino acid sequence represented by SEQ ID No.4 is subjected to substitution, deletion, and/or addition of one or more amino acids, and/or a protein with terminal modification and with a same activity. The EtMA2 protein and the EtMA2-outsidedomain protein can be used for preparing eimeria-resisting medicines. Through the immunization of the EtMA2-outsidedomain protein, chicken can be effectively controlled from being infected by E.tenella. Therefore, the dosages of anticoccidial drugs in chicken farms can be greatly reduced, and chicken coccidiosis can be effectively controlled.
Owner:INST OF ANIMAL HEALTH GUANGDONG ACADEMY OF AGRI SCI

Method for simulating rapid induction of anticoccidial drug-resistant strains in field and separation and identification method of anticoccidial drug-resistant strain

The invention belongs to the technical field of coccidium drug-resistant strain induction and acquisition, and particularly relates to a test for rapidly inducing drug-resistant strains in a simulated field and a separation and identification scheme of the drug-resistant strain, which are related to an anticoccidial drug. According to the method for simulating field rapid induction of the anti-coccidiosis drug-resistant strains, by designing two batches of rapid induction drug-resistant strain tests before and after, a plurality of stable drug-resistant strains can be rapidly screened out within 7 weeks, and then a sufficient number of drug-resistant strains can be obtained within a short time. According to the test, under the condition that the original strain background is clear, the coccidium drug-resistant strains can be rapidly screened, high timeliness is achieved, the sample number required by subsequent deep analysis is met, the reliability of the method is verified in the test for screening the drug-resistant strains of the two drugs, and the method has the advantages of being short in consumed time, easy to operate and low in cost and can be widely applied to test induction, screening and identification of chicken coccidiosis drug-resistant strains.
Owner:CHINA AGRI UNIV
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