Nghiên cứu vòng đời sán lá gan nhỏ (Opisthorchiidae) ở chó, mèo tại Việt Nam

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Tác giả: Vũ Vỹ Huỳnh, Đức Quyết Lê, Hứa Ngọc Lực Lê, Đức Tân Nguyễn, Văn Thái Nguyễn, Văn Thoại Nguyễn

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học kỹ thuật Thú y, 2023

Mô tả vật lý: tr.38

Bộ sưu tập: Metadata

ID: 346884

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In this study, the life cycle of the small liver fluke (O. viverrini, C. sinensis) was determined with two intermediate hosts: The first intermediate host was freshwater snail (Bithynia siamensis, B.fuchsiana), the second intermediate host was freshwater fish (silver carp -Hypophthalmichthys molitrix, java barb - Barbonymus gonionotus, crusian carp - Carassius auratus, common carp - Cyprinus carpio, grass carp - Ctenopharyngodon idellus). The adult flukes parasitized in liver of dog and cat, layed eggs then eggs were released into the natural water environment (ponds, rivers, streams, ...). In freshwater, the fluke eggs developed into miracidium larvae after 9-15 days, these larvae always exist inside the eggs. When snails (B. siamensis, B. fuchsiana) swallowed the eggs, inside the snail, miracidium was released and developed through the stages of sporocyst, redia and cercaria. After 55-62 days cercariae were released from the snail, swimming freely in water and penetrating in freshwater fish. Inside freshwater fish, fluke larvae developed into metacercaria after 25-40 days. When dog, catdefinitive host consumed freshwater fish containing metacercaria, fluke larvae developed to mature fluke after 26-32 days (O. viverrini) and 28-34 days (C. sinensis).Trong nghiên cứu này, vòng đời sán lá gan nhỏ (O. viverrini, C. sinensis) đã được xác định với 2 vật chủ trung gian: Vật chủ trung gian thứ nhất là ốc nước ngọt (Bithynia siamensis, B. fuchsiana), vật chủ trung gian thứ 2 là cá nước ngọt (cá trắm cỏ, cá chép, cá diếc, cá mè vinh, cá mè trắng). Sántrưởng thành ký sinh trong gan của chó, mèo
sán thải trứng theo phân ra ngoài môi trường (ao hồ,sông, suối,...). Ở môi trường nước ngọt tự nhiên, trong trứng hình thành ấu trùng miracidium sau 9-15 ngày, trứng không nở ra miracidium. Khi ốc B. siamensis, B. fuchsiana ăn phải trứng, ấu trùng miracidium thoát ra khỏi vỏ trứng, phát triển qua các giai đoạn sporocyst, redia và cercaria. Sau 55-62 ngày, cercaria thoát ra khỏi ốc, bơi tự do trong nước, xâm nhập vào cá nước ngọt. Ấu trùng sán tiếp tục phát triển trongcá nước ngọt và tạo thành dạng nang kén metacercaria sau 25-40 ngày. Khi chó, mèo ăn phải cá nước ngọt chứa ấu trùng ở dạng kén, ấu trùng sán tiếp tục phát triển đến giai đoạn sán trưởng thành, thải trứng theo phân ra ngoài môi trường từ 26-32 ngày (O. viverrini) và 28-34 ngày (C. sinensis)

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