{"id":11169,"date":"2024-05-28T14:20:56","date_gmt":"2024-05-28T06:50:56","guid":{"rendered":"https:\/\/abtvn.com\/?p=11169"},"modified":"2025-08-06T13:56:35","modified_gmt":"2025-08-06T06:26:35","slug":"5-dieu-can-biet-ve-heo-tai-xanh-prrs","status":"publish","type":"post","link":"https:\/\/abtvn.com\/en\/5-dieu-can-biet-ve-heo-tai-xanh-prrs\/","title":{"rendered":"5 \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 heo tai xanh PRRS<\/strong>"},"content":{"rendered":"

Heo tai xanh hay c\u00f2n g\u1ecdi l\u00e0 h\u1ed9i ch\u1ee9ng r\u1ed1i lo\u1ea1n sinh s\u1ea3n v\u00e0 h\u00f4 h\u1ea5p \u1edf heo (Porcine Reproductive and Respiratory Syndrome – PRRS), l\u00e0 m\u1ed9t trong nh\u1eefng b\u1ec7nh l\u00fd nghi\u00eam tr\u1ecdng nh\u1ea5t \u0111\u1ed1i v\u1edbi ng\u00e0nh ch\u0103n nu\u00f4i heo tr\u00ean to\u00e0n c\u1ea7u. B\u1ec7nh n\u00e0y kh\u00f4ng ch\u1ec9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ee9c kh\u1ecfe c\u1ee7a heo m\u00e0 c\u00f2n g\u00e2y ra nh\u1eefng thi\u1ec7t h\u1ea1i kinh t\u1ebf \u0111\u00e1ng k\u1ec3 cho ng\u01b0\u1eddi ch\u0103n nu\u00f4i. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1edbi thi\u1ec7u t\u1ed5ng quan, l\u1ecbch s\u1eed g\u00e2y b\u1ec7nh, d\u1ecbch t\u1ec5 h\u1ecdc, t\u00e1c h\u1ea1i, tri\u1ec7u ch\u1ee9ng, con \u0111\u01b0\u1eddng l\u00e2y lan, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1ea9n \u0111o\u00e1n b\u1ec7nh heo tai xanh.<\/p>\n\n\n\n

1. L\u1ecbch s\u1eed h\u00ecnh th\u00e0nh c\u1ee7a heo tai xanh<\/strong><\/h2>\n\n\n\n

B\u1ec7nh r\u1ed1i lo\u1ea1n h\u00f4 h\u1ea5p v\u00e0 sinh s\u1ea3n \u1edf heo hay c\u00f2n g\u1ecdi l\u00e0 \u201cHeo tai xanh\u201d (theo \u0111\u00e1nh gi\u00e1 c\u1ee7a Zimmerman v\u00e0 c\u1ed9ng s\u1ef1, 2012) PRRS l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c nh\u1eadn di\u1ec7n v\u00e0o n\u0103m 1987 t\u1ea1i Hoa K\u1ef3, n\u0103m 1989 t\u1ea1i Nh\u1eadt B\u1ea3n v\u00e0 n\u0103m 1990 t\u1ea1i \u0110\u1ee9c. Ch\u1ec9 trong v\u00e0i n\u0103m, n\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t \u0111\u1ea1i d\u1ecbch.<\/p>\n\n\n\n

B\u1ec7nh n\u00e0y do virus PRRS (PRRSV) g\u00e2y ra. Virus n\u00e0y \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n v\u00e0o n\u0103m 1991 t\u1ea1i H\u00e0 Lan v\u00e0 n\u0103m 1992 t\u1ea1i Hoa K\u1ef3 (Zimmerman v\u00e0 c\u1ed9ng s\u1ef1, 2012) v\u00e0 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 m\u1ed9t th\u00e0nh vi\u00ean c\u1ee7a b\u1ed9 Nidovirales, h\u1ecd Arteriviridae, chi Arterivirus (Faaberg v\u00e0 c\u1ed9ng s\u1ef1, 2012). PRRSV l\u00e0 m\u1ed9t virus RNA s\u1ee3i \u0111\u01a1n v\u00e0 c\u1ea5u tr\u00fac sinh h\u1ecdc c\u1ee7a virus \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng.<\/p>\n\n\n\n

Ban \u0111\u1ea7u, b\u1ec7nh \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 nh\u01b0 m\u1ed9t h\u1ed9i ch\u1ee9ng v\u00e0 b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi m\u1ed9t s\u1ed1 b\u1ec7nh kh\u00e1c. N\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ec7nh b\u00ed \u1ea9n \u1edf heo (SMD) ho\u1eb7c h\u1ed9i ch\u1ee9ng v\u00f4 sinh v\u00e0 h\u00f4 h\u1ea5p \u1edf heo (SIRS) tr\u01b0\u1edbc khi t\u00ean g\u1ecdi heo tai xanh (PRRS) tr\u1edf th\u00e0nh t\u00ean g\u1ecdi \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn r\u1ed9ng r\u00e3i.<\/p>\n\n\n\n

Trong 20 n\u0103m qua, \u0111\u00e3 c\u00f3 nhi\u1ec1u nghi\u00ean c\u1ee9u v\u1ec1 virus PRRS. M\u1eb7c d\u00f9 hi\u1ec7n nay \u0111\u00e3 bi\u1ebft nhi\u1ec1u v\u1ec1 virus n\u00e0y, nh\u01b0ng chi ti\u1ebft v\u1ec1 vi\u1ec7c ki\u1ec3m so\u00e1t b\u1ec7nh cho t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i h\u00ecnh ch\u0103n nu\u00f4i heo v\u1eabn ch\u01b0a ho\u00e0n thi\u1ec7n. PRRS l\u00e0 b\u1ec7nh c\u00f3 \u00fd ngh\u0129a kinh t\u1ebf quan tr\u1ecdng nh\u1ea5t hi\u1ec7n nay \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ng\u01b0\u1eddi ch\u0103n nu\u00f4i. S\u1ef1 h\u1ee3p nh\u1ea5t ng\u00e0nh c\u00f4ng nghi\u1ec7p ch\u0103n nu\u00f4i heo trong 15 n\u0103m qua \u0111\u00e3 d\u1eabn \u0111\u1ebfn vi\u1ec7c to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng s\u1ea3n xu\u1ea5t \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u1ef1a tr\u00ean c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ki\u1ec3m so\u00e1t ho\u1eb7c lo\u1ea1i tr\u1eeb b\u1ec7nh n\u00e0y.<\/p>\n\n\n\n

\"<\/figure>\n\n\n\n

H\u00ecnh 1. C\u1ea5u tr\u00fac b\u1ed9 gen v\u00e0 h\u1ea1t virus tr\u01b0\u1edfng th\u00e0nh c\u1ee7a virus PRRSV. (A) C\u00e1c protein phi c\u1ea5u tr\u00fac n\u1eb1m \u1edf \u0111\u1ea7u 5\u2019 c\u1ee7a b\u1ed9 gen, m\u00e3 h\u00f3a cho hai polyprotein kh\u00e1c nhau pp1a v\u00e0 pp1ab \u0111\u01b0\u1ee3c ph\u00e2n c\u1eaft th\u00e0nh \u00edt nh\u1ea5t 14 nsps (nsp1 \u0111\u1ebfn nsp12 v\u00e0 nsp1\u03b1 v\u00e0 nsp1\u03b2, v\u00e0 nsp7\u03b1, v\u00e0 nsp7\u03b2). C\u00e1c protein c\u1ea5u tr\u00fac n\u1eb1m g\u1ea7n \u0111\u1ea7u 3\u2019, \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi v\u1ecf virus v\u00e0 RNA packaging. (B) H\u1ea1t virus tr\u01b0\u1edfng th\u00e0nh PRRSV, bao g\u1ed3m l\u1edbp v\u1ecf lipid k\u00e9p v\u1edbi c\u00e1c glycoprotein th\u1ee5 th\u1ec3 virus li\u00ean quan \u0111\u1ebfn nhi\u1ec5m tr\u00f9ng v\u00e0 x\u00e2m nh\u1eadp t\u1ebf b\u00e0o. RNA d\u01b0\u01a1ng t\u00ednh chu\u1ed7i \u0111\u01a1n \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi protein nucleocapsid \u1edf l\u1edbp b\u00ean trong c\u1ee7a virus. (Ngu\u1ed3n<\/a>)<\/em><\/p>\n\n\n\n

2. D\u1ecbch t\u1ec5 h\u1ecdc b\u1ec7nh Heo tai xanh PRRSV<\/strong><\/h2>\n\n\n\n

Ngo\u00e0i heo nh\u00e0, heo r\u1eebng hoang d\u00e3 v\u00e0 heo r\u1eebng, kh\u00f4ng c\u00f3 lo\u00e0i n\u00e0o kh\u00e1c \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n nhi\u1ec5m PRRSV m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean. Virus n\u00e0y kh\u00f4ng g\u00e2y nguy hi\u1ec3m cho ng\u01b0\u1eddi v\u00e0 kh\u00f4ng l\u00e2y nhi\u1ec5m cho ng\u01b0\u1eddi ho\u1eb7c c\u00e1c t\u1ebf b\u00e0o c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb ng\u01b0\u1eddi.<\/strong><\/p>\n\n\n\n

Ngay sau khi ph\u00e1t hi\u1ec7n ra virus, ng\u01b0\u1eddi ta \u0111\u00e3 nh\u1eadn th\u1ea5y r\u1eb1ng c\u00e1c ch\u1ee7ng virus \u1edf ch\u00e2u \u00c2u v\u00e0 B\u1eafc M\u1ef9 \u0111\u1ea1i di\u1ec7n cho hai ki\u1ec3u gen ri\u00eang bi\u1ec7t, Type 1 v\u00e0 Type 2, c\u0169ng kh\u00e1c bi\u1ec7t v\u1ec1 kh\u00e1ng nguy\u00ean (Zimmerman v\u00e0 c\u1ed9ng s\u1ef1, 2012). H\u1ea7u h\u1ebft c\u00e1c ch\u1ee7ng PRRSV \u1edf Nam M\u1ef9 v\u00e0 nhi\u1ec1u khu v\u1ef1c c\u1ee7a ch\u00e2u \u00c1 thu\u1ed9c Type 2 v\u00e0 ng\u01b0\u1eddi ta cho r\u1eb1ng nguy\u00ean nh\u00e2n t\u1eeb s\u1ef1 v\u1eadn chuy\u1ec3n heo ho\u1eb7c t\u1eeb s\u1ef1 ph\u00e1t t\u00e1n tinh d\u1ecbch.<\/p>\n\n\n\n

H\u1ea7u h\u1ebft c\u00e1c virus PRRSV c\u00f3 \u0111\u1ed9c l\u1ef1c cao \u1edf \u0110\u00f4ng Nam \u00c1 (PRRSV c\u00f3 \u0111\u1ed9c l\u1ef1c cao) \u0111\u1ec1u c\u00f3 s\u1ef1 \u0111\u1eb7c tr\u01b0ng l\u00e0 m\u1ea5t \u0111o\u1ea1n axit amin trong v\u00f9ng NSP2 c\u1ee7a b\u1ed9 gen. Tuy nhi\u00ean, c\u00e1c b\u1eb1ng ch\u1ee9ng th\u1ef1c nghi\u1ec7m \u0111\u00e3 cho th\u1ea5y nh\u1eefng \u0111o\u1ea1n gen b\u1ecb m\u1ea5t n\u00e0y kh\u00f4ng th\u1ec3 d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9c l\u1ef1c c\u1ee7a ch\u1ee7ng virus (Shi v\u00e0 c\u1ed9ng s\u1ef1, 2010a; Zhou v\u00e0 c\u1ed9ng s\u1ef1, 2010).<\/p>\n\n\n\n

S\u1ef1 \u0111a d\u1ea1ng ng\u00e0y c\u00e0ng t\u0103ng gi\u1eefa c\u00e1c ch\u1ee7ng c\u1ee7a hai ki\u1ec3u gen \u0111\u01b0\u1ee3c t\u1ea1o ra trong qu\u00e1 tr\u00ecnh nh\u00e2n b\u1ea3n PRRSV v\u00e0 s\u1ef1 t\u00e1i t\u1ed5 h\u1ee3p gi\u1eefa c\u00e1c ch\u1ee7ng (Murtaugh v\u00e0 c\u1ed9ng s\u1ef1, 2010). C\u0169ng \u0111\u00e3 c\u00f3 c\u00e1c m\u00f4 t\u1ea3 v\u1ec1 c\u00e1c ch\u1ee7ng PRRSV Type 1 \u1edf \u0110\u00f4ng \u00c2u v\u1edbi m\u1ee9c \u0111\u1ed9 \u0111a h\u00ecnh cao v\u00ec v\u1eady \u0111\u00e3 c\u00f3 \u0111\u1ec1 xu\u1ea5t ph\u00e2n bi\u1ec7t c\u00e1c ph\u00e2n ki\u1ec3u 1, 2 v\u00e0 3 trong Type 1. Ngo\u00e0i ra c\u00e1c nghi\u00ean c\u1ee9u sau n\u00e0y c\u0169ng \u0111\u00e3 t\u00ecm ra \u0111\u01b0\u1ee3c nhi\u1ec1u ch\u1ee7ng lo\u1ea1i kh\u00e1c c\u1ee7a PRRSV v\u00e0 v\u00f4 h\u00ecnh trung \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1ea9n \u0111o\u00e1n v\u00e0 nghi\u00ean c\u1ee9u vaccine.<\/p>\n\n\n\n

C\u00e1c ch\u1ee7ng virus PRRS c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t v\u1ec1 \u0111\u1ed9c l\u1ef1c. C\u01a1 s\u1edf c\u1ee7a s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1ed9c l\u1ef1c v\u1eabn ch\u01b0a \u0111\u01b0\u1ee3c bi\u1ebft. C\u00e1c epitop b\u1ea3o v\u1ec7 ch\u01b0a \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 v\u00e0 kh\u00f4ng th\u1ec3 d\u1ef1 \u0111o\u00e1n t\u1eeb ph\u00e2n t\u00edch b\u1ed9 gen. Virus th\u01b0\u1eddng t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c virus g\u00e2y b\u1ec7nh kh\u00e1c, vi khu\u1ea9n v\u00e0 Mycoplasma hyopneumoniae \u0111\u1ec3 l\u00e0m t\u0103ng m\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng c\u1ee7a c\u00e1c b\u1ec7nh.<\/p>\n\n\n\n

Tuy nhi\u00ean, virus PRRS ch\u1ec9 c\u00f3 kh\u1ea3 n\u0103ng kh\u00e1ng l\u1ea1i s\u1ef1 suy tho\u00e1i m\u00f4i tr\u01b0\u1eddng m\u1ed9t c\u00e1ch v\u1eeba ph\u1ea3i. Virus d\u1ec5 b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a b\u1edfi phenol, formaldehyde v\u00e0 h\u1ea7u h\u1ebft c\u00e1c ch\u1ea5t kh\u1eed tr\u00f9ng th\u00f4ng th\u01b0\u1eddng. Virus c\u00f3 \u00e1i l\u1ef1c v\u1edbi c\u00e1c t\u1ebf b\u00e0o c\u1ee7a h\u1ec7 mi\u1ec5n d\u1ecbch, bao g\u1ed3m c\u00e1c \u0111\u1ea1i th\u1ef1c b\u00e0o n\u1ed9i m\u1ea1ch ph\u1ed5i (PIM) v\u00e0 c\u00e1c \u0111\u1ea1i th\u1ef1c b\u00e0o ph\u1ebf nang ph\u1ed5i (PAM); trong c\u00e1c t\u1ebf b\u00e0o n\u00e0y, virus sao ch\u00e9p m\u1ea1nh m\u1ebd. C\u00e1c PAM ch\u00ednh v\u00e0 m\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng nu\u00f4i c\u1ea5y t\u1ebf b\u00e0o li\u00ean t\u1ee5c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n l\u1eadp v\u00e0 duy tr\u00ec virus<\/p>\n\n\n\n

3. Tri\u1ec7u ch\u1ee9ng c\u1ee7a heo tai xanh<\/strong><\/h2>\n\n\n\n
\"Heo
H\u00ecnh 2: c\u00e1c tri\u1ec7u ch\u1ee9ng c\u1ee7a heo tai xanh<\/figcaption><\/figure>\n\n\n\n

Heo tai xanh \u0111\u01b0\u1ee3c nh\u1eadn bi\u1ebft qua c\u00e1c tr\u01b0\u1eddng h\u1ee3p:<\/p>\n\n\n\n

S\u1ea9y thai \u1edf giai \u0111o\u1ea1n cu\u1ed1i thai k\u1ef3 v\u00e0 \u0111\u1ebb s\u1edbm ho\u1eb7c mu\u1ed9n.<\/p>\n\n\n\n

Heo con ch\u1ebft non v\u00e0 heo con y\u1ebfu.<\/p>\n\n\n\n

S\u1ed1 l\u01b0\u1ee3ng c\u00e1c heo n\u00e1i \u0111\u1ebb l\u1ea1i trong giai \u0111o\u1ea1n c\u1ea5p t\u00ednh c\u1ee7a b\u1ec7nh d\u1ecbch th\u01b0\u1eddng t\u0103ng.<\/p>\n\n\n\n

Hi\u1ebfm khi c\u00f3 c\u00e1c b\u00e1o c\u00e1o v\u1ec1 c\u00e1c th\u1ea5t b\u1ea1i sinh s\u1ea3n \u1edf giai \u0111o\u1ea1n \u0111\u1ea7u \u0111\u1ebfn gi\u1eefa thai k\u1ef3. Nguy\u00ean nh\u00e2n g\u00e2y ra c\u00e1c r\u1ed1i lo\u1ea1n sinh s\u1ea3n li\u00ean quan \u0111\u1ebfn PRRSV c\u00f3 th\u1ec3 l\u00e0 do t\u1ed5n th\u01b0\u01a1ng do virus g\u00e2y ra cho nhau thai v\u00e0 n\u1ed9i m\u1ea1c t\u1eed cung (Karniychuk & Nauwynck, 2013).<\/p>\n\n\n\n

\u1ede heo \u0111\u1ef1c gi\u1ed1ng v\u00e0 heo n\u00e1i ch\u01b0a \u0111\u01b0\u1ee3c ph\u1ed1i, c\u00f3 th\u1ec3 quan s\u00e1t th\u1ea5y s\u1ed1t tho\u00e1ng qua v\u00e0 ch\u00e1n \u0103n.<\/p>\n\n\n\n

H\u1ed9i ch\u1ee9ng h\u00f4 h\u1ea5p \u0111\u01b0\u1ee3c nh\u1eadn bi\u1ebft qua kh\u00f3 th\u1edf (“th\u1edf h\u1ed5n h\u1ec3n”), s\u1ed1t, ch\u00e1n \u0103n v\u00e0 m\u1ec7t m\u1ecfi.<\/p>\n\n\n\n

Heo con b\u1ecb \u1ea3nh h\u01b0\u1edfng nhi\u1ec1u h\u01a1n heo l\u1edbn tu\u1ed5i v\u1edbi heo \u0111\u1ef1c v\u00e0 heo n\u00e1i (ch\u01b0a \u0111\u01b0\u1ee3c ph\u1ed1i) th\u01b0\u1eddng b\u1ecb nhi\u1ec5m tr\u00f9ng c\u1eadn l\u00e2m s\u00e0ng.<\/p>\n\n\n\n

S\u1ed1 l\u01b0\u1ee3ng c\u00e1c nhi\u1ec5m tr\u00f9ng th\u1ee9 c\u1ea5p t\u0103ng l\u00ean l\u00e0 ph\u1ed5 bi\u1ebfn v\u00e0 t\u1ef7 l\u1ec7 t\u1eed vong c\u00f3 th\u1ec3 cao.<\/p>\n\n\n\n

\u1ede heo \u0111\u1ef1c gi\u1ed1ng b\u1ecb nhi\u1ec5m PRRSV v\u00e0 nh\u1eefng heo \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u00eam vaccine s\u1ed1ng gi\u1ea3m \u0111\u1ed9c l\u1ef1c, PRRSV c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ti\u1ebft ra trong tinh d\u1ecbch (Christopher-Hennings v\u00e0 c\u1ed9ng s\u1ef1, 1997).<\/p>\n\n\n\n

4. Con \u0111\u01b0\u1eddng l\u00e2y nhi\u1ec5m<\/strong><\/h2>\n\n\n\n

Virus ch\u1ee7 y\u1ebfu l\u00e2y truy\u1ec1n tr\u1ef1c ti\u1ebfp qua ti\u1ebfp x\u00fac v\u1edbi heo b\u1ecb nhi\u1ec5m b\u1ec7nh, nh\u01b0ng c\u0169ng qua ph\u00e2n, n\u01b0\u1edbc ti\u1ec3u v\u00e0 tinh d\u1ecbch. N\u00f3 c\u0169ng c\u00f3 th\u1ec3 l\u00e2y lan qua c\u00e1c vect\u01a1 c\u00f4n tr\u00f9ng (ru\u1ed3i nh\u00e0 v\u00e0 mu\u1ed7i) v\u00e0 gi\u00e1n ti\u1ebfp, \u0111\u01b0\u1eddng kh\u00ed dung, d\u1eabn \u0111\u1ebfn t\u00e1i nhi\u1ec5m m\u00e3n t\u00ednh cho c\u00e1c \u0111\u00e0n heo \u1edf khu v\u1ef1c \u0111\u00f4ng \u0111\u00fac.<\/p>\n\n\n\n

\"c\u00e1c
H\u00ecnh 3: c\u00e1c con \u0111\u01b0\u1eddng l\u00e2y lan c\u1ee7a PRRSV<\/figcaption><\/figure>\n\n\n\n

Heo n\u00e1i b\u1ecb nhi\u1ec5m khi mang thai c\u00f3 th\u1ec3 sinh ra heo con nhi\u1ec5m PRRSV b\u1ea9m sinh. Virus c\u00f3 th\u1ec3 truy\u1ec1n t\u1eeb heo con ho\u1eb7c n\u00e1i nhi\u1ec5m b\u1ec7nh sang heo con kh\u00e1c. Chu k\u1ef3 ph\u00e1t t\u00e1n v\u00e0 nhi\u1ec5m b\u1ec7nh c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c v\u00e0o giai \u0111o\u1ea1n cai s\u1eefa trong nh\u1eefng t\u00ecnh hu\u1ed1ng m\u00e0 \u0111\u00e0n heo n\u00e1i \u0111ang b\u1ecb nhi\u1ec5m b\u1ec7nh. Heo l\u1edbn h\u01a1n b\u1ecb nhi\u1ec5m b\u1ec7nh gi\u1eef l\u1ea1i trong c\u00e1c nh\u00e0 nu\u00f4i ho\u1eb7c \u0111\u01b0\u1ee3c nu\u00f4i ch\u00e9o trong nh\u00e0 \u0111\u1ebb th\u01b0\u1eddng l\u00e0 ngu\u1ed3n l\u00e2y nhi\u1ec5m cho heo con. T\u01b0\u01a1ng t\u1ef1, heo l\u1edbn h\u01a1n v\u00e0 d\u1ecbch ti\u1ebft c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 l\u00e0 ngu\u1ed3n l\u00e2y nhi\u1ec5m cho heo con \u1edf nh\u1eefng n\u01a1i kh\u00f4ng c\u00f3 bi\u1ec7n ph\u00e1p an ninh sinh h\u1ecdc gi\u1eefa c\u00e1c nh\u00f3m.<\/p>\n\n\n\n

Heo \u0111\u1ef1c gi\u1ed1ng \u0111\u01b0\u1ee3c bi\u1ebft l\u00e0 ph\u00e1t t\u00e1n virus PRRS trong tinh d\u1ecbch l\u00ean \u0111\u1ebfn 92 ng\u00e0y sau khi nhi\u1ec5m v\u00e0 c\u00f3 th\u1ec3 l\u00e2y nhi\u1ec5m cho heo n\u00e1i trong qu\u00e1 tr\u00ecnh ph\u1ed1i gi\u1ed1ng. Heo n\u00e1i b\u1ecb nhi\u1ec5m b\u1ec7nh th\u00f4ng qua ph\u1ed1i gi\u1ed1ng t\u1ef1 nhi\u00ean ho\u1eb7c th\u1ee5 tinh nh\u00e2n t\u1ea1o. S\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a th\u1ee5 tinh nh\u00e2n t\u1ea1o v\u00e0 c\u00e1c c\u01a1 s\u1edf heo \u0111\u1ef1c gi\u1ed1ng \u0111\u00e3 t\u1ea1o ra nhu c\u1ea7u nghi\u00eam ng\u1eb7t v\u1ec1 an ninh sinh h\u1ecdc v\u00e0 gi\u00e1m s\u00e1t virus PRRS t\u1ea1i c\u00e1c c\u01a1 s\u1edf<\/p>\n\n\n\n

M\u1eb7c d\u00f9 hi\u1ec7n nay \u0111\u00e3 c\u00f3 nhi\u1ec1u nghi\u00ean c\u1ee9u s\u00e2u r\u1ed9ng k\u1ec3 t\u1eeb khi ph\u00e1t hi\u1ec7n ra PRRSV, v\u1eabn c\u00f2n nhi\u1ec1u kho\u1ea3ng tr\u1ed1ng trong c\u01a1 s\u1edf ki\u1ebfn th\u1ee9c v\u1ec1 m\u1ed1i li\u00ean h\u1ec7 r\u00f5 r\u00e0ng gi\u1eefa PRRSV v\u00e0 c\u00e1c b\u1ec7nh kh\u00e1c c\u0169ng nh\u01b0 hi\u1ec3u bi\u1ebft v\u1ec1 ph\u1ea3n \u1ee9ng mi\u1ec5n d\u1ecbch c\u1ee7a PRRSV.<\/p>\n\n\n\n

5. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u00e9t nghi\u1ec7m PRRSV<\/strong><\/h2>\n\n\n\n

Ch\u00fa th\u00edch c\u00e1c \u0111\u00e1nh d\u1ea5u:<\/p>\n\n\n\n