Vi khu\u1ea9n, ai nghe th\u1ea5y c\u0169ng ph\u1ea3i s\u1ee3, ch\u00fang l\u00e0 nh\u1eefng vi sinh v\u1eadt g\u00e2y b\u1ec7nh cho ng\u01b0\u1eddi. Vi khu\u1ea9n c\u00f3 r\u1ea5t nhi\u1ec1u ch\u1ee7ng lo\u1ea1i, nh\u01b0ng kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i vi khu\u1ea9n \u0111\u1ec1u g\u00e2y h\u1ea1i cho con ng\u01b0\u1eddi, c\u00f3 m\u1ed9t s\u1ed1 v\u00f4 h\u1ea1i v\u1edbi ng\u01b0\u1eddi, c\u00f3 m\u1ed9t s\u1ed1 c\u00f2n c\u00f3 \u00edch v\u1edbi ng\u01b0\u1eddi. Vi khu\u1ea9n l\u00e0 m\u1ed9t lo\u1ea1i sinh v\u1eadt, ch\u00fang c\u0169ng sinh tr\u01b0\u1edfng, sinh s\u00f4i, khi ch\u00fang ph\u1ee5 thu\u1ed9c hay k\u00ed sinh v\u00e0o c\u00e1c sinh v\u1eadt th\u1ec3 kh\u00e1c, ch\u00fang v\u1eeba h\u00fat ch\u1ea5t dinh d\u01b0\u1ee1ng \u1edf k\u00ed ch\u1ee7 (sinh v\u1eadt m\u00e0 vi khu\u1ea9n sinh s\u1ed1ng tr\u00ean \u0111\u00f3) \u0111\u1ec3 nu\u00f4i s\u1ed1ng m\u00ecnh, \u0111\u1ed3ng th\u1eddi l\u1ea1i ti\u1ebft ra m\u1ed9t \u00edt ch\u1ea5t \u0111\u1ed9c, khi ch\u00fang sinh s\u00f4i nhi\u1ec1u ch\u1ea5t \u0111\u1ed9c t\u00edch t\u1ee5 l\u1ea1i g\u00e2y h\u1ea1i cho k\u00ed ch\u1ee7, cho n\u00ean vi khu\u1ea9n kh\u00f4ng nh\u1eefng g\u00e2y b\u1ec7nh cho con ng\u01b0\u1eddi, c\u00f2n g\u00e2y b\u1ec7nh cho c\u1ea3 \u0111\u1ed9ng v\u1eadt, th\u1ef1c v\u1eadt.<\/p>\n\n\n\n
Vi khu\u1ea9n c\u00f3 m\u1ed9t t\u00ednh k\u00ec l\u1ea1: ch\u00fang kh\u00f4ng ph\u1ea3i k\u00ed sinh m\u1ed9t c\u00e1ch kh\u00f4ng ch\u1ecdn l\u1ecdc l\u00ean b\u1ea5t k\u00ec m\u1ed9t sinh v\u1eadt th\u1ec3 n\u00e0o m\u00e0 c\u00f3 ch\u1ecdn l\u1ecdc k\u00ed sinh ch\u1ee7 ph\u00f9 h\u1ee3p \u0111\u1ec3 k\u00ed sinh. C\u00f3 m\u1ed9t s\u1ed1 vi khu\u1ea9n kh\u00f4ng h\u1ec1 k\u00ed sinh tr\u00ean c\u01a1 th\u1ec3 ng\u01b0\u1eddi, m\u00e0 k\u00ed sinh tr\u00ean sinh v\u1eadt th\u1ec3 kh\u00e1c ph\u00f9 h\u1ee3p v\u1edbi n\u00f3. Qua nghi\u00ean c\u1ee9u khoa h\u1ecdc ph\u00e1t hi\u1ec7n, t\u1ec9 l\u1ec7 ch\u1ebft c\u1ee7a m\u1ed7i \u0111\u1eddi c\u00f4n tr\u00f9ng l\u00e0 80% – 99%, v\u1edbi nguy\u00ean nh\u00e2n l\u1edbn l\u00e0 do s\u1ef1 l\u00e2y nhi\u1ec5m vi khu\u1ea9n. Hi\u1ec7n nay \u0111\u00e3 ph\u00e1t hi\u1ec7n c\u00f3 h\u01a1n 100 lo\u1ea1i vi khu\u1ea9n c\u00f3 th\u1ec3 g\u00e2y b\u1ec7nh gi\u1ebft ch\u1ebft c\u00f4n tr\u00f9ng. V\u00ec v\u1eady c\u00e1c nh\u00e0 khoa h\u1ecdc l\u1ee3i d\u1ee5ng nh\u1eefng vi khu\u1ea9n c\u00f3 h\u1ea1i v\u1edbi c\u00f4n tr\u00f9ng \u0111\u1ec3 ti\u00eau di\u1ec7t c\u00f4n tr\u00f9ng.<\/p>\n\n\n\n
V\u00ed d\u1ee5 vi khu\u1ea9n bacillus thuringiensis c\u00f3 hi\u1ec7u qu\u1ea3 di\u1ec7t c\u00f4n tr\u00f9ng r\u1ea5t cao, lo\u1ea1i tr\u1ef1c khu\u1ea9n n\u00e0y l\u00e0 m\u1ed9t gia t\u1ed9c l\u1edbn c\u1ee7a lo\u00e0i khu\u1ea9n nha b\u00e0o, \u00edt nh\u1ea5t g\u1ed3m 17 lo\u00e0i bi\u1ebfn ch\u1ee7ng nh\u01b0 v\u1eady. Trong qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i ch\u1ea5t ch\u00fang c\u00f3 th\u1ec3 s\u1ea3n sinh ra m\u1ed9t lo\u1ea1i \u0111\u1ed9c ch\u1ea5t c\u00f3 h\u1ea1i \u0111\u1ed1i v\u1edbi c\u00f4n tr\u00f9ng, trong \u0111\u00f3 ch\u1ee7 y\u1ebfu l\u00e0 ch\u1ea5t \u0111\u1ed9c tinh th\u1ec3, l\u00e0 m\u1ed9t lo\u1ea1i k\u1ebft tinh protein \u0111\u1ed9c t\u00ednh r\u1ea5t m\u1ea1nh. Sau khi c\u00f4n tr\u00f9ng \u0103n ph\u1ea3i th\u1ee9c \u0103n c\u00f3 vi khu\u1ea9n bacillus thuringiensis, c\u00e1c nha b\u00e0o c\u1ee7a tr\u1ef1c khu\u1ea9n l\u1eadp t\u1ee9c sinh s\u00f4i trong \u0111\u01b0\u1eddng ti\u00eau h\u00f3a c\u1ee7a c\u00f4n tr\u00f9ng, \u0111\u1ed3ng th\u1eddi s\u1ea3n sinh ra nhi\u1ec1u \u0111\u1ed9c t\u1ed1, khi\u1ebfn cho \u0111\u01b0\u1eddng ru\u1ed9t c\u1ee7a c\u00f4n tr\u00f9ng b\u1ecb t\u00ea li\u1ec7t, sau m\u1ea5y gi\u1edd c\u00f4n tr\u00f9ng s\u1ebd ng\u1eebng \u0103n, c\u01a1 th\u1ec3 c\u0169ng cu\u1ed9n tr\u00f2n l\u1ea1i, khu\u1ea9n \u1ed1ng nhanh ch\u00f3ng x\u00e2m nh\u1eadp t\u1eeb \u0111\u01b0\u1eddng ti\u00eau h\u00f3a v\u00e0o \u201ckhoang m\u00e1u\u201d g\u00e2y b\u1ec7nh nhi\u1ec5m tr\u00f9ng m\u00e1u, c\u00f4n tr\u00f9ng c\u0169ng t\u1eeb \u0111\u00f3 m\u00e0 b\u1ecb ch\u1ebft. T\u1eeb l\u00fac nhi\u1ec5m khu\u1ea9n cho \u0111\u1ebfn l\u00fac ch\u1ebft m\u1ea5t kho\u1ea3ng 2 – 3 ng\u00e0y. Vi khu\u1ea9n bacillus thuringiensis c\u00f3 th\u1ec3 ph\u00f2ng tr\u1ecb kho\u1ea3ng 400 lo\u1ea1i c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i, \u0111\u1ed1i v\u1edbi b\u1ed9 c\u00f4n tr\u00f9ng v\u1ea3y c\u00f3 c\u00e1nh g\u00e2y uy hi\u1ebfp ch\u00ed m\u1ea1ng nh\u01b0 s\u00e2u r\u00f3m c\u00e2y th\u00f4ng, s\u00e2u ng\u00f4, s\u00e2u \u0111\u1ee5c th\u00e2n,\u2026 hi\u1ec7u qu\u1ea3 tr\u1eeb \u0111\u1ea1t 80%, nh\u01b0ng n\u00f3 c\u0169ng c\u00f3 h\u1ea1i nh\u01b0 v\u1eady v\u1edbi c\u00e1c lo\u00e0i t\u1eb1m nh\u00e0 v\u00e0 t\u1eb1m th\u1ea7u d\u1ea7u, cho n\u00ean, khi s\u1eed d\u1ee5ng tr\u1ef1c khu\u1ea9n n\u00e0y di\u1ec7t c\u00f4n tr\u00f9ng ph\u1ea3i ch\u00fa \u00fd kh\u00f4ng \u0111\u1ec3 nhi\u1ec5m v\u00e0o c\u00e2y d\u00e2u, c\u00e2y th\u1ea7u d\u1ea7u. Thu\u1ed1c tr\u1eeb s\u00e2u d\u00f9ng tr\u1ef1c khu\u1ea9n bacillus thuringiensis ch\u1ebf t\u1ea1o ra l\u00e0 m\u1ed9t lo\u1ea1i thu\u1ed1c ph\u1ea5n m\u00e0u tr\u1eafng ho\u1eb7c m\u00e0u v\u00e0ng nh\u1ea1t, s\u1eed d\u1ee5ng r\u1ea5t thu\u1eadn ti\u1ec7n. C\u00f4n trr\u00f9ng b\u1ecb vi khu\u1ea9n gi\u1ebft ch\u1ebft, trong c\u01a1 th\u1ec3 c\u00f4n tr\u00f9ng v\u1eabn c\u00f2n l\u01b0u l\u1ea1i l\u01b0\u1ee3ng l\u1edbn vi khu\u1ea9n, c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c l\u00e2y lan sang c\u00e1c c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i kh\u1ecfe m\u1ea1nh kh\u00e1c, m\u1ed9t ng\u01b0\u1eddi n\u00f4ng d\u00e2n gom l\u1ea1i nh\u1eefng c\u00f4n tr\u00f9ng ch\u1ebft, nghi\u1ec1n nh\u1ecf, h\u00f2a th\u00eam n\u01b0\u1edbc r\u1ed3i t\u01b0\u1edbi l\u00ean n\u01a1i c\u00f3 c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i, nh\u01b0 v\u1eady c\u0169ng c\u00f3 t\u00e1c d\u1ee5ng di\u1ec7t s\u00e2u b\u1ec7nh m\u1ed9t c\u00e1ch h\u1eefu hi\u1ec7u.<\/p>\n","protected":false},"excerpt":{"rendered":"
Vi khu\u1ea9n, ai nghe th\u1ea5y c\u0169ng ph\u1ea3i s\u1ee3, ch\u00fang l\u00e0 nh\u1eefng vi sinh v\u1eadt g\u00e2y b\u1ec7nh cho ng\u01b0\u1eddi. Vi khu\u1ea9n c\u00f3 r\u1ea5t nhi\u1ec1u ch\u1ee7ng lo\u1ea1i, nh\u01b0ng kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i vi khu\u1ea9n \u0111\u1ec1u g\u00e2y h\u1ea1i cho con ng\u01b0\u1eddi, c\u00f3 m\u1ed9t s\u1ed1 v\u00f4 h\u1ea1i v\u1edbi ng\u01b0\u1eddi, c\u00f3 m\u1ed9t s\u1ed1 c\u00f2n c\u00f3 \u00edch v\u1edbi ng\u01b0\u1eddi. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,19],"tags":[],"class_list":["post-9798","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tu-nhien"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9798","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9798"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9798\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9798"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9798"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}