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¡¡¡¡Abstract
¡¡¡¡The 817 broiler is a small meat chicken produced by the parent of the fast-large whitefeather broiler and the product generated. The product produced is produced by the product,which combines the production performance advantages of white charry and the productionperformance of the egg chicken. It has the fast growth rate and good meat. specialty. Since thebody of 817-breed is mainly the commodity generation eggs, there is no disease purificationand strict immunity, 817 broilers have more egg-rolls of eggs, and the maternal antibodies ofthe disease, so that 817 broiler disease is getting more and more complex. There are many typesof epidemic diseases, old disease is not flat, new diseases, general, clinical symptoms aregradually non-typical, and immunosuppressive disease is increasingly serious, these newfeatures give 817 broilers' disease prevention, which brings great challenges. In order toobjectively evaluate the quality of the chicken seedlings of the city of 817 broiler, furtherunderstand the popularity of major infectious diseases in the 817 feeding process, in order toprovide scientific basis and prevention and control programs for disease prevention and control,specializing in the epidemic disease of the city 817 broiler Research on Study andComprehensive Prevention and Control Technology.
¡¡¡¡This study passed the pathogens, serological and pathological testing methods, for 2019-2020, 56 city 817-scale chemical chicken field avian influenza, new city disease, infectiousanemia, chicken, blood disease, adenovirus disease, Salmonella disease and large intestine Theepidemic and immune status of the seven major infectious diseases of bacillus disease wasinvestigated. The survey shows that most of the 817 broiler farms in Yucheng have betterprevention and control of the above virus disease, but the adenovirus and the poor virus have ahigh detection rate and are mostly vertically infected, at 1 day old, 7th The detection rates ofadenovirus and pilot viruses were 18.07%, 17.05%, 18.44%, 14.47%, 14.34%, 14.53%,respectively. The detection rate of adenovirus and poverty viruses of clinical pathogenesis andpilot viruses is as high as 55.56% and 48.72%, far above three different age stages of sampledetection rate. The results of bacterial disease test showed that the Samples collected in thethree different ages and the first three different age stages of 7 days and the previous threedifferent ages were the highest, 14.46%, 18.95% and 20.11%, and the separation rate of Salmonella was relatively low. It is 6.02%, 5.04%, 8.66%, and the three-day age group is morethan 7 days and 1 day.
¡¡¡¡The detection results of the 817 broiler of the 817 broiler (H5RE-11, H7, H9) and new cityantibody levels in the top three different age stages of 7 days, 21 days, and the first threedifferent age stages showed that the 7-day aging source antibody level is generally Between 6to 7 titers, but about 10% of the two diseases of the two diseases are too high, the antibody titeris greater than 10 and the dispersion is large, indicating that the chicken group of these chickmay have two diseases. 21 day-old chick influenza (H9) and new city antibody levels aregenerally between 4 to 6 titers, but about 1/4 of the chicken antibody level is too low, there is arisk of two diseases, avian influenza (H5RE -11, h7) Mother source antibody is less than 4 titers;before the bars, the maternal antibodies have substantially disappeared, avian influenza (H9)and the new city antibody level are generally 5 ~ 6 drops. Between the degree, the level ofantibody in some chickens is too low, or too high, the dispersion is large, indicating that thechicken is immune or has occurred.
¡¡¡¡Based on the 817 broiler epidemiology survey and antibody level test results, combinedwith the aquaculture of the 817 chicken farm in Shandong Province, we have strengthened thedetection and quality of the vertical infectious diseases of 817 broilers, and the adjustmentoptimized bird flu, new city disease , The immunization procedure of adenovirus, increased theeffort of E. coli drug test and the development of a drug prevention plan, and a significantincrease in the culture level was significantly improved after the exemplary field promotion.
¡¡¡¡The study further enriched the 817 broiler epidemiological information in our province,preliminaryly, the common vertical infectious diseases of the city of 817 broilers were deeplyrecognized that the immunodeficiency of important epidemic and the harm of bacterial diseaseswere well developed. Prevention measures will help 817 broilers have effectively preventionand regulate the breeds, improve the level of breeding, and ensure food safety.
¡¡¡¡Key words : 817 Broiler; Healthy Breeding, Epidemiology; Antibody Detection; DiseasePrevention and Treatment ¡£
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