rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Hiệu quả điều trị của thực khuẩn thể đối với bệnh do vi khuẩn Escherichia coli trên gà
  title info:
    sub title: Luận văn tốt nghiệp Cao học. Chuyên ngành Thú y
  title info: title
  name:
    name part: Nguyễn, Lê Thảo Vy
    role:
      role term: creator
  type of resource: text
  origin info:
    place:
      place term: xx
    place:
      place term: Cần Thơ
    publisher: Trường Đại học Cần Thơ
    date issued: 2020
    date issued: 9999
    issuance: monographic
  language:
    language term: und
  physical description:
    form: print
  abstract: Nghiên cứu được thực hiện nhằm mục đích đánh giá khả năng điều trị của thực khuẩn thể (TKT) đối với vi khuẩn E. coli ATCC® 25922TM gây bệnh trên gà. Thí nghiệm điều trị gồm 252 cá thể gà công nghiệp và 252 cá thể gà Nòi 1 ngày tuổi được bố trí hoàn toàn ngẫu nhiên gồm 7 nghiệm thức với 3 lần lặp lại. Gà công nghiệp được gây nhiễm E. coli vào ngày tuổi thứ 2 bằng cách cho uống 1 mL 107,1 CFU/mL, tương tự ở gà Nòi với liều 1 mL 107,4 CFU/mL. TKT được cho uống sau 24 giờ với liều 1 mL 109 CFU/mL và lặp lại mỗi tuần 1 lần đến kết thúc thí nghiệm. Kết quả thí nghiệm cho thấy sau 4 tuần theo dõi, tỷ lệ chết của gà công nghiệp và gà Nòi cao nhất ở NT7 lần lượt là 63,9%, 58,3%; tiếp theo là NT5 (44,4%; 25%); NT4 (41,7%; 22,2%) và thấp nhất là NT6 (27,8%; 16,7%). Mật số vi khuẩn trong các cơ quan tim, gan, lách của cả hai giống gà ở các nghiệm thức qua 4 tuần giảm dần và thấp nhất ở NT6, tuy nhiên ở NT7 vi khuẩn vẫn hiện diện với tỷ lệ cao. Phần trăm khối lượng cơ quan không bị tác động bởi E. coli và thực khuẩn thể. Thí nghiệm đánh giá tác động của TKT trên tăng trọng ở gà cho thấy, sau 5 tuần thí nghiệm, trọng lượng của gà công nghiệp thấp nhất ở NT7 (2177 g/con), ở các nghiệm thức điều trị có trọng lượng lần lượt ở NT4 là 2463 g/con, NT5 là 2380 g/con và NT6 là 2340 g/con. Hệ số chuyển hóa thức ăn ở NT7 (2,62) cao hơn so với các nghiệm thức còn lại. Trọng lượng ở gà Nòi ở 14 tuần tuổi thấp nhất ở NT7 (1173 g/con). Ở các nghiệm thức điều trị, NT6 có trọng lượng cao nhất với 1267 g/con, tiếp theo là NT5 (1248 g/con) và NT4 là 1224 g/con. Hệ số chuyển hóa thức ăn ở NT7 (5,59) c…
  note: Nguyễn Lê Thảo Vy ; Nguyễn Trọng Ngữ (Cán bộ hướng dẫn)
  subject:
    topic: Gà,Chickens
  subject:
    topic: Bệnh,Diseases
  classification: 636.5089
  classification: V600
  record info:
    record creation date: 210402
    record identifier: CTU_239289