Nghiên cứu hiệu quả sử dụng các loại cao thảo dược để phòng và trị bệnh do vi khuẩn Streptococcus Agalactiae gây ra trên cá rô phi (Oreochromis sp.)=Study on the effect of herbal extracts on the prevention and treatment of disease caused by Streptococcus agalactiae in tilapia (Oreochromis sp.)

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Đức Quỳnh Anh Nguyễn, Ngọc Phước Nguyễn, Thị Huế Linh Nguyễn, Thị Xuân Hồng Nguyễn

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học kỹ thuật Thú y, 2024

Mô tả vật lý: tr.56

Bộ sưu tập: Metadata

ID: 486440

Thêm vào giỏ

Mục tiêu của nghiên cứu này là đánh giá ảnh hưởng của 4 loại cao chiết: xuyên tâm liên (Andrographis paniculata), kinh giới (Elsholtzia ciliata), tía tô (Perilla frutescens) và cỏ mực (Eclipta prostrata) bằng dung môi methanol, bổ sung vào thức ăn đến khả năng phòng và trị bệnh do Streptococcus agalactiae gây ra trên cá rô phi (Oreochromis sp.). Những chủng vi khuẩn S. agalactiae dùng trong nghiên cứu này đã được phân lập từ cá rô phi nhiễm bệnh ở tỉnh Đồng Tháp (kiểu huyết thanh III) và ở tỉnh Thừa Thiên-Huế (kiểu huyết thanh Ib). Cao chiết thảo dược được bổ sung riêng biệt vào mỗi kg thức ăn với các tỷ lệ 156 mg (xuyên tâm liên), 1.250 mg (kinh giới), 2.500 mg (tía tô) và 2.500 mg (cỏ mực). Cá thí nghiệm được gây cảm nhiễm bệnh bằng phương pháp tiêm xoang bụng với 0,1 mL vi khuẩn S. agalactiae kiểu huyết thanh III hoặc Ib với mật độ là 104 CFU/mL. Kết quả nghiên cứu cho thấy, việc bổ sung cao chiết các loại thảo dược nêu trên vào thức ăn đã cho hiệu quả phòng bệnh cao đặc biệt là khi tăng tần suất cho ăn hai lần/tuần. Cao chiết xuyên tâm liên, tía tô và cỏ mực là loại cao thảo dược tiềm năng có thể sử dụng trong phòng và trị bệnh do vi khuẩn S. agalactiae gây ra trên cá rô phi.This study was conducted to evaluate the effect of herbal extracts in methanol from bitterweed (Andrographis paniculata), lemon balm (Elsholtzia ciliata), perila (Perilla frutescens) and white elicta (Eclipta prostrata), these herbal extracts were mixed into feed for prevention and treatment of Streptococcus agalactiae infection in tilapia (Oreochromis sp.). This bacteria strain was isolated from the infected tilapia in Dong Thap (serotype III) and in Thua Thien-Hue province (serotype Ib) used in this study. Bitterweed (Andrographis paniculata), lemon balm (Elsholtzia ciliata), perila (Perilla frutescens) and white elicta (Eclipta prostrata) extracts were mixed separately into feed with doses of 156 mg bitterweed
1,250 mg lemon balm
2,500 mg perila and 2,500 mg white elicta per one kg feed. Fish were infected experimentally by intraperitoneal injection with 0.1 mL of 104 CFU/mL of S. agalactiae serotype III or serotype Ib. The studied results showed that the above herbal extracts proved the high prevention of S. agalactiae infection in tilapia, especially when increasing the feeding rhythm twice per week. The extract of bitterweed, perila or white elicta can be considered as potential herbal extracst for the prevention and treatment of disease caused by S. agalactiae in tilapia.

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