KHOA HOC KY THUAT THU Y TAP XXVT SO 7 - 2019
TINH HINH NHIEM SAN LA RUOT FASCIOLOPSISBUSHI TREN DAN LOfN BAN fijA TAI TINH OIEN BIEN
Nguyen Vdn Tuyen', .\guySn TJii Kim Lan-
TOM TAT
De danh gia tinh hinh nhiera san la rupt tren dan Ign ban dia tai tinh Dien Bien, tir nam 2016 den 2019, chiing toi da tien hanh mo kham 1.163 con Ion ban dia va xet nghiera 1.872 man Ign. Ket qua nghien cixu cho t h i y ty le Ign bi nhi£m san la ruot dugc xac dinh thong qua mo kham la 2,75%. Ty Ie nay thong qua xet nghiem phan la 2,56%, ty Ie Ign bi nhiem san !a rupt bien dpng theo dia phucmg, tir 1,04 - 4,12%.
Lira tuoi Ign, phucmg thirc chan nuoi va miia vu co anh huong ro ret den ty le va c u o n g dp nhiem san la Fasciolopsis buski cr !gn (P < 0,05). Cu the: Ty Ie va c u a n g dp nhiem san la ruot tang dan theo Ilia tuoi Ign. Ty le va cucmg dp nhiem san la rupt ciia lgn ban dia a mua he va m u a thu cao han a mua dong va miia xuan. Lgn nuoi tha rong c6 ty le va cuong dp nhiem san la rugt cao nhat (3,66%) va thap nhat a Ign nuoi nb6t (0,55%); Ign nuoi a viing bang phang c6 ty Ie nhiem cao (5,96%), Ign nuoi a vung nui cao co ty ie nhiem thap hem (0,86%).
Tir khoa: Lgn ban dia, Fasciolopsis buski, ty Ie nhiem, cuong do nhiem, tinh Dien Bien.
Study on infection of Fasciolopsis buski In local pigs In Dien Bien province
Nguyen Van Tuyen, Nguyen Thi Kim Lan
SUMMARY
in order to obtain data on the situation of infection with Fasciolopsis busl<ii\uke in the local pigs in Dien Bien province, this study was conducted from 2016 to 2019 through the examination of 1872 pig fecal samples and autopsy of 1163 pigs. The studied results showed that the infection rate of local pigs with Fasciolopsis buskivjas 2.75% through the autopsy and 2.56% through examining fecal samples. This infection rate was fluctuated by locality from 1.04% to 4.12%. The pig age, raising procedures, season that effected to the prevalence ot Fasciolopsis buski m the local pigs (P<0,05).
The infection rate and intensity of Fasciolopsis bus/(/increased by the age of pigs. The infection rate of local pigs with Fasc/o/ops/s busto in the summer and autumn season was higher than in the winter and spring season. The infection rate of pigs with Fasciolopsis buski fluke was highest in the free grazing method (3-66%) and the lowest infection rate was in the captive grazing method (0 55%) The pigs raising in the flat area were infected with the higher infection rate (5.96%) in comparison with the pigs raising in the high mountain area (0.86%).
Keywords: Local pigs, Fasciolopsis buski, infection rate, infection intensity, Dien Bien province.
I. DATVAN DE Benh san ia rugt Ign la mgt benh t h u a n g t h i y a Benh san la nipt lgn do Ioai san la ' ^ ; ^ ? n h thuong dien bi^n cham, bigu hien khong Fasciolopsis buski gay ra la mot benh ph6 ' " " / ^ ' ^ S ' ^ 1? chet khong cao nhung Iam giam kha bign cua Ign a cac nuac chau A, br Iuc dia An ^ ^ S smh trucrng, phat trien va siic dg khang ciia Dp dgn Viln Dong (Trung Quoc), dac bigt la ^^ * ^ ^ '^^^- ^ ^ ° ' " ^ '^^ ^^'^ ^^^ benh ke phat.
o vung Dong Nam chau A. Benh gay thiet hai ^ g n mac benh san la rugt thuong giy. cham Ion a hau hgt cac dan Ign b mign BJc Viet Nam do ^^ tieu c h a y
tap quan cho Ign an song cac Ioai rau Ihuy sinh. Dign Bign la mpt tinb mign nui thupc khu vuc ien Bien Tay Bac. Giong Ign ban dia dugc nuoi a Dig- ' Cao dang Kinhle-Ky thuat Dien Bien voi s6 luona kha nhigu. Cho dgn nav R i i o - -
^Dai hgc Nong Lam Thai Nguyen " - ^ ' ^ " ^ ^ ^ "
KHOA HOC KY THUAT THtl Y TAP XXVI SO 7-2019
con rdt nliigu kho khan trong viec phat trien kinh tg - xa hpi. Dien Bien co dia hinh rimg nui xen Ian nhigu cho thap co nuac, nhan dan dia phuang da so ia dfing bao dan tpc thieu so, trinh dp dan tri con thSp, chan nuoi Ign ban dia theo phuong thtic tha rong con nhieu. Do la nhSng digu kien thuan Icri din den Ion mac benh giun san nhigu, trong do CO benh san la rupt Ign. Cho den nay van chua co nghien ciiu nao vg thuc trang nhiem san la mot tren Ign va bien phap phong trj benh cho Ign ban dia tai khu vuc Tay Bac Viet Nam noi chung va tinh Dien Bien noi rigng.
Trong pham vi bai viet nay, chiing toi trinb bay ket qua nghien ciiu ve thuc trang nhiem san la rupt Fasciolopsis bush tren dan Ign ban dia ciia tinb Dien Bien, thuc bien tir nam 2016 dgn 2019. Nhirng ket qua nay la ca sa khoa hgc cho viec nghien ciiu va de xuat bien phap phong chong benb bieu qua cho dan Ign ban dia nuoi tai cac dia phuong.
n. NOI DUNG, VAT LIEU VA PHUONG PHAP NGHIEN CUtJ 2.1. Noi dung nghien cuu
- Tinh trang nhiem san la F. buski a Ign ban dia qua mo kham.
"Tyle vacuongdp nhiem san laF buski tren Ipn ban dia tai cac dia phuang theo iiia tuoi, phuong thtrc chan nuoi, mua vu va dia hinb.
2.2. Vat lieu nghien ciru
Dpng vat: Lgn ban dia dugc nuoi trong cac nong ho a 5 huyen ciia tinh Dien Bien (Muong Cha, Dien Bien, Dien Bign Dong, Muong Ang, Muong Nhe).
Mau san la mot thu thap tir lgn ban dia qua mo kham.
Mau phan tuoi ciia Ipn cac lira tuoi.
Kinh hien vi quang hpc, bg dung cu xet nghiem phan, buong dem Mc. Master
Cac hoa chat va dung cu thi nghiem kliac.
2.3. PhttOTig phap nghien ciiu
- Mo kham 1.163 Ign ban dia theo phuang phap mo kham khong toan dien ciia Skrjabin K. 1.
(1928), thu thap toan bp san la ky sinh o rugt non
ciia Ipn ban dia.
- Lay mau phan tbeo phuang phap ldy mlu chiim nhigu bac (Nguygn Nhu Thanh, 2001).
- Xet nghiem 1.872 mau phan Ipn ban dia dl xac dinh ty Ie nhigm san la rupt Ipn b§ng phuong phap lang can Benedek (1943). Dimg buong dim Mc. Master de xac dinh cuang dp nlnem san la rugt Ign (Nguyin Thi Kim Lan, 2012). Quy dinh so Iugng trirng/gam phan nhu sau:
< 200 triing/gam phan: cuang dp nhigm nhe.
>200 - 500 trirng/gam phan. cuang do nhilm trung binh.
>500 triing/gam phan: cuong do nhigm nang.
2.4. Phuo'ng phap xie Iy so lieu
Cac so lieu thu dugc dugc xir Iy tbeo phuang phap thong kg sinh hpc tren phan mera Excel va Minitab 16.0.
III. KET QUA NGHIEN ClTU 3.1. Ty ic nhiSm san la F. buski tren lgn ban dia tai cac dia phuong
Qua mo kham 1. 163 Ign ban dia tai 5 huyen thugc tinb Dien Bign, bang I cho tbay: ty Ie nhiem chung la 2,75%, cuong do nliiem 3,13 ± 0,25 san/Ign. Trong do, Ign a huyen Dien Bign va Muong Ang co ty le nhigm cao nhat (4,4% va 3,98%), cuong dp nhigm i k lugt la 3,83 ± 0,32 va 3,44 ± 0,50. Lgn ban dja nuoi a cac huyen con lai nhiera san la rupt vai ty le thip han va cuang dp nhiem ciing nhe ban. Ket qua phan tich thong kg cho thay, ty Ie nhiem san la rupt tai cac dia phirong co su sai khac ro ret (P<0,01) Ty Ie nhigm san la rugt F. buski khac nliau giira cac huyen phu thuoc vao nhieu yeu to nhu' dieu kien va phuang thirc chan nuoi, tinh trang ve sinb thii y, thai tilt, khi hau, dia binh..., trong do, yeu to dia hinh dong vai tro quan trong.
Qua kiiao sat, chiing toi nhan thay Muong Cha, Dien Bign Dong va Mirang Nhe la 3 huyen co nhieu niii cao, it song suoi, khe rach, c6 nhigu rupng can nen thilu moi trirong nuac cho 6c nuac ngpt - ky chu tmng gian ciia san la rugt phat tnln. Dien Bien va Muong Ang la 2 huyen co dia hinh thap han, co nhieu khe suoi d6 ra, co nhilu chan mgng hiing, co nirac quanh nam, la dilu kien tot cho 6c nuac ngpt phat frien. Ve
KHOA HOC KY THUAT THU Y TAP XX^Vl SO 7 - 2019
Bang 1. Ty ie va c u ^ n g do nhiem san la F. huski \ren iori ban dja tar cac huyen (qua mo kham)
(huyen) Mifcyng Cha Dien Bien Dien Bien Dong Mi/ang Ang MLfang Nile Tint! Chung
S6 la'n mo kham (con) 251 273 198 226 215 1163
S6 lo-n nhilm (con)
5 12 4 9 2 32
Ty le nhiim
'(%)
1.99^^
4,40=
2,02"' 3,98' 0,93"
2,75
Cipo'ng dp nhiem (so san/io-n) ( x + r r i j ) 2,20 ± 0,37 3,83 ± 0,32 2,00 ± 0,58 3,44 ± 0,50 2,00+1,0 3,13 + 0,25
min - max 1 - 3 3 - 6 1 - 3 1 - 0 1 - 3 1 - 6
* Ghi chu: Hieo hdng doc, cdc ty le nhiem mang chir cdi khac nhau thi kimc nliau coy nghia thong M (P < 0,05) miia mua, nuac song, suoi thuong dang lgn cac thua
mong ven suoi, la idiu vuc nguoi dan thuang iha rong Ign. Khi Ion nuoi tha rongbj doi thuang tim kiem thiic an trong tu nhien nen dg an nhimg cay thiiy sinh moc ven ba suoi, bo mong co mang au trung san la rupt co siic gay benh. Vi vay, ty Ie nhiem san la rapt tren lgn nuoi o 2 huyen nay cao ban cac huyen khac.
Tir kgt qua tren, chiing toi nhan thay, ty Ie nhiem
san la mpt trgn Ign ban dia tai 5 huyen cua tinh Dien Bign thap han kha nhieu so vai ket qua n ^ e n ciiu cua Nguygn Van Thp (2005), khi tac gia rao kham 1.420 Ign tai mpt so tinh viing dong bang song Hong, tbay ty Ie nhiem san la rupt a Ipn la 33,52%.
Da kiem tra 1.872 mau phan Ipn ban dia tai 5 huyen cua tinh Dien Bien dg xac dinb ty Ie va cuong dp nhiem san la mgt Ign. Kgt qua the bien a bang 2.
Bang 2. Ty le va c u ^ n g do n h i l m san la F. buski tren Ip-n ban dja tar cac dja phu'O'ng {qua xet nghiem phan)
(huyen)
Mu'ang Cha Dien Bien Dien Bien Dong lyiu'ong Ang M\jbnq Nhe Tinh Chung
S6lcm (con)
372 437 381 394 288 1872
S6 io^
nhiem (con) 8 18 5 14 3 48
Tyle nhiem
2,15"
4,12"
1,31»
3,55«
1,04"
2,56 So
(:
io'n 7 11
4 10 3 35
Cu'O'ng do nhiim (trii'ng/g phan) Nhe
<200) Tyle
(%)
87,50 61,11 80,00 71,43 100,0 72,92
Trung binh (>200 So Io'n
1 5 1 3 0 10
-500) Tyle
(%)
12,50 27,78 20,00 21,43 20,83
Nang
(>
So Io'n 0 2 0 1 0 3
500) Tyle
(%)
11,11
7,14
6,25 Ghi chir. Tlieo Imngdgc, cdc ly le nhiem mang dm caikiiac nhau thi klidc nliau coy nghia ihdng ke(P<0,
Ket qua bang 2 cho thay Ign co ty Ig nhiem chung la 2,56%. Trong do, lgn a huyen Dien Bign co ty Ie nhiem san la mgt cao nhat (4,12%), ke dgn la Ian nuoi a cac huyen Muong Ang, Muong Cha, Dien
05) Bien Dong vol ty le nhilm lln lirgt la 3,55%- 2 15%-
1.31% va nliiem thjp nhSt la 1cm nuoi ij huyen Mirrnig Nlie (1.04%). Cuong do nli Jni chii ySu la nhe (chiem ten 72,92%). Ket qua nay .Jiap hon so vol kit
KHOA HOC KY THUAT THU Y TAP XXVI SO 7 - 2019
qua khao sat ciia Phan Thi Hong Phiic (2007) trgn Ian tai tinh Thai Nguyen (ty le nhilm san la mot tren Ipn a Thai Nguygn la 22,37%). Ty le nbigm san la nipt a lgn tai cac huyen la tuang doi thap, qua phan tich thfing kg cho thay co su sai khac gi&a huyen Dien Bien vai cac huyen Muong Ang, Muong Cha va Dien Bien Dong, Muong Nhe. Ty Ie nhiem qua ket qua xet
nghiem phan thap la do dia hinh ciia tinb Dien Bign chu yeu la d6i niii xen cac thung lung, song su6i nho hep va doc, khong thich hpp cho 6c nuac nggt - ky chii trung gian ciia san la mot phat trign.
3.2. Ty le va c u ^ g do nhiSm san la F. buski tren lan ban flia theo lira tu6i ciia Ion Bang 3. Ty le va circfng do nhiem san la F. buski tren lo-n ban dja theo Irja tuoi
Tuoi Io'n (thang)
<3
> 3 - 6
>6.12 2 12 Tinh Chung
So iiyn xet nghiem
(con) 478 544 483 367 1872
So Io'n nhilm
(con) 2 9 16 21 48
Tyle nhiim
(%)
0,42"
1,65"' 3,31»
5,72"
2,56 1
Cu'O'ng do nhiim (triing/g phan) Nhe
[< 200) So Io'n Ty le (%)
2 8 12 13 35
100 88,89 75,00 61,90 72,92
Trung binh (> 200 - 500) So len
0 1 3 6 10
Ty lo (%)
11,11 18,75 28,57 20,83
i S6 lOT 0 0 1 2 3
Mang
>500) 1 Tyle(%)
6,25 9,52 6,25
Ghi chu: Theo hdng doc, cdc ty le nhiem mang chu cdi khac nhau thi khac nhau coy nghia thong ke(P<0,05) Ket qua bang 3 cho thay: a cac lira tuoi deu co Ign
nhiem san \d.F. buski, nhung cac lira tuoi khac nhau thi ty Ie va cuang dp nhiem khac nhau. Ty le va cuong dp ohiem san la F. buski tang theo Uioi Ipn, thap nhat la Ipn duai 3 thang tuoi (0,42%); tiep theo la Ign 3 - 6 thang tuoi (1,65%); Ign 6 -12 thang tuoi nhilm 3,31%i, ty Ie nhigm cao nhat a lgn trgn 12 thang hioi (5,72%).
Qua phan tich thong kg cho thay, su sai khac vg ty le nhiem giira cac lira tuoi Ign la rat ro ret (P<0,001).
Kgt qua trgn pbu hop vai nhan xet cua cac tac gia Pham Van Khue va Phan Luc (1996), Nguyin Thi Kim Lan (2012) va ciing tuong dong vai kgt qua nghign ciiu ciia Nguygn Van Thp (2005), Phan Thi H6ng Phuc (2007). Cac tac gia tren deu cho rang, thai gian song cua san \kF buski trong ca thg vat chu kha dai (4 - 5 nam), dong thai tuoi cang cao tbi Ign cang c6 nhigu nguy ca tiep xiic vai moi tmong song va de nuot phai au tning CO siic gay benh san la mpt va mac benh. 6 lgn ban dia tai Dien Bign thi kha nang tai nhilm nhieu lan rat de xayra.
3.3. Ty le va cuwng do nhiem san la F. buski tren Ion ban dja theo phiroTig thirc chan nuoi
Bang 4 cho thay: CJ tinh Dien Bien, ty le nliiem san
la F. buski a Ion ban dia cao nhat a Ipn nuoi iha rong (3,66%), bgp den la Ign nuoi ban chan tha (2,2%) va thap nhat la a Ipn nuoi nhot hoan toan (0,55%). Ty Ie nhigm san la F buski giiia 3 phuong thiic nuoi o Dien Bien co su sai khac rat ro ret (P<0,01).
Nguygn Thi Kun Lan (2012) cho biet: tap quan chan nuoi co anh huong ro ret den ty Ie nhiem benh san la mpt Ign. Nuoi Ign bang rau song thiiy sinh hoac tha rong thi Ign mac benh san la mgt nhieu va nang. Lgn nhigm F. buski do an song cac loai thuc vat tbiiy sinh nhu rau muong, rau lap, rong, beo ... Qua khao sat thuc te cho thay, a Dien Bign, lgn nuoi theo phuang thiic tha rong va ban chan tha thuang van dgng va tira kiem tbiic an a moi truang tu nhign, quanh nuong ray, tren cac ba rugng hoac trong khe suoi, thara chi co nhimg con con lgi ca xu6ng mgng an cay thuy sinh. Ngoai ra, nguai chan nuoi con tan dung ca cac loai rau nhu rau muong nuoc, rang, beo... cho Ign an song. Vi vay Ign nuoi tha rong va ban chan tha co nhigu dieu kien tiep xuc true tiep vai mSm benli. Lgn nuoi theo phuang thiic nuoi nh6t thuong dugc cham soc tot hon, nhieu hg con thuc hien viec tay giun, san cho Ign nen ty Ie nbigm thap ban a doi tugng Ion nay.
KHOA HOC KY THUAT THU Y TAP XXVI SO 7 - 2019
Bang 4. Ty le va cipo'ng do nhiem san la F. buski Iren Io'n ban dja theo phrj'O'ng thii'c chan nuoi
Phifcng nuoi
Tha rong Ban chan tha Nh6t hoan
toan Tinh chung
So Io'n xet nghiem
(con)
874 636 362 1872
So ian nhrim (con)
32 14 2 48
Tyle nhilm
3,66^
2,20"
o.ss-^
2,56
(
Cipo'ng do nhiem Nhe
< 200)
S6l.„ ^
22 11 2 35
68,75 78,57 100,0 72,92
(trOna/a phan) Trung binh (> 200 - 500) S6 \tyn
8 2 0 10
Tyle
(%)
25,00 14,28
20,83 Nang (> 500)
Tyle So iffn ,0,^,'
2 6,26 1 7,14 0
3 6,25 Ghi chii: Theo hdng doc. cdc ty le nhiim mang chO- cdi khac nhau thi khac nhau coy nghm thong ke(P<0,05) 3.4. Ty le va cirtmg do nhiem san la F. buski tren loTi ban flia theo miia vii
Bang 5. Ty le va cu-o-ng dp nhiem san la F. buski tren Iccn ban dja theo miia vij
Cu'O'ng do nhiem (tripng/g phan) fAiia vu xet nghiem nhiim _J;J|~
(con) (con)
Nhe (< 200)
Trung binh (> 200 - 500)
Nang (> 500)
1,57^
3,53"
3.42^
1,28^
So Io'n 6 13 12 4
Tyle
(%)
85,71 68,42 70,59 80,00
Sd io'n 1 4 4 1
Tyle
(%)
14,29 21,05 23,53 20,00
So Io'n
2 1
TJIe
(%)
10,53
-
5,88 Xuan
He Thu Dong
445 538 497 392 Tinh chung 1872
Ghi chii: Theo hang dgc, cdc ty le nhiem mang chu cdi Ididc nhau tin klidc nhaii coy nghia thong ke(P< 0,05) Ket qua bang 5 cho thay: Ty Ie nhiem san la
rugt F. buski a lgn ban dia vao miia Hg va miia Thu cao hem so voi miia Dong va miia Xuan, dong thcri cuang do nhiem cQng nang han.
Kigm tra ty Ie nhigm san la F. buski trgn Ign ban dia tbeo cac miia khac nhau tren phan mgm Mmitab 16.0, kit qua thSy co su sai khac ro ret giiia miia He va miia Thu so voi mua Dong va miia Xuan (P<0,01). Dieu nay dong nghla voi ty Ie nhigm san la F buski co ban CO sir khac nhau ro ret giiia cac miia trong nam.
Ket qua tren dugc giai thich nhu sau: vao miia Xuan, ky chu tmng gian la cac Ioai 6c nuoc ngpt bit diu sinh san manh, do la dieu kien thuan lgi
cho au triing san la F buski xam nhap va phat trien thanh au triing co sire gay benh. Khi Icm nu6t phai au tning co sire gay benb se bi nhilm san, sau 3 thang au tning phat irien thanb san tnrang thanh va lai de tning theo phan lgn ra ngoai. Vi vay, xet nghiem phan Ign trong miia He thiy ty Ie nhilm cao nhat. Trong kbi, vao miia Dong, nuac o cac sons, ngoi, kenh. rach thuang xu6ng thdp, a cac canh dong lua thuang bi can, dong thai miia Dong nhiet dp thap ngn ban chg su phat trign ciia 6c. do vay ty le nbigm san la F buski vao miia Dong thuong thSp.
Ket qua nghien ciiu cua chiing toi phii hgp voi nhan xgt cua Pham Sy Lang va cs (2006) \ a Xsuyin Thi Kim Lan (2012).
KHOA HOC KY THUAT THtJ Y TAP XXVI S6 7 - 2019
3.5. Ty le v^ ciroTig do nhiem san la F. buski trgn Ion ban dia theo dia hinh
Bang 6. Ty le va cu'O'ng dp nhilm san la F. buski tren lan ban dja theo dja hinh
Dia hinh
Viing bang ph^ng Viing ban san dia VOng nui cao
Tinh Chung So Io'n xet nghiem
(con)
386 672 814 1872
So Io'n nhiem (con)
23 18 7 48
Tyle nhilm
2,68"
0,86=
2,56
t
Cu'O'ng do nhieir Nhe
< 200) S 6 I . „ ^
16 14 6 35
65,21 77,78 85,71 72,92
1 (triFng/g phan) Trung binh (> 200 - 500) Sd io'n
6 3 1 10
Tyle
(%)
26,09 16,67 14,29 20,83
Nang (> 500) S6,.n ^
2 8,70 1 5,56 0
3 6,25 Ghi chii: Theo cdc ty le nhiem mang chit.- cdi khac nlmu thi Ididc nhau co y nghia thong ke(P<0,05)
Bang 6 cho thay: ty le va cuong do nhiem san la F.
bush a Ign ban dia theo dia hinh c6 sg khac nhau. Ty le va cuong d6 nhiem san la F buski giain dan tir viing bang phang (5,96%) dgn viing ban son dia (2,68%) va thSp nhat a viing niii cao (0,86%). Ket qua xii' ly thong ke cho thay: ty le nhiSm san la mdt Ion a cac viing dia lunhkhac nhau co su khac nhau ro ret (P<0,01). Tlieo chiing toi, so di co su' khac nliau Uen la do nhiet dp va dp am a cac viing sinh thai khac nhau, dong thcri a vimg bang phang co dien tich mat nuoc nhigu han nen da anh huong manh dgn sir phan bo va phat trien ciia 6c nuoc ngpt - ky chii tmng gian ciia san la mot Ign.
Ket qua nghign ciiu ciia chiing toi cung phii hgp voi nhan xet ciia Nguyin Van Thp (2005) va Nguyen Thi Kim Lan (2012).
IV. KET LUAN
Ty Ie nhigm san la mpt a Ign ban dia qua mo kham la 2,75%, cuong do nhiem tmng binh la 3,13
± 0,25; ty le nhigm qua xet nghiem phan la 2,56%.
Ty Ie va cuong dp nhigm san la rugt tang dan theo Ilia tuoi Ign.
Ty le va cuong dp nhigm san la rugt ciia lgn ban dia a miia He va mua Thu cao ban miia Dong va miia Xuan.
Lgn nuoi theo hinh thiic tha rong nhiem san la mpt 3,66%, lgn nuoi nh6t nhigm 0,55%
Lgn nuoi a khu vuc bang phang nhigm san la nipt 5,96%, 6 khu vuc mii cao nhiem 0,86%.
TAI LIEU THAM KHAO 1. Pham Van Khue va Phan Luc (1996), Ky sinh
triing thu y, Nxb Nong nghiep. Ha Noi.
2. Nguygn Thi Kim Lan (2012), Gido tiinh l(y sinh triing vd benh ky sinh triing thii y, Nxb N6ng nghiep. Ha Noi, tr 59 - 63
3. Pham Sy Lang, Nguygn Thi Kim Lan, Nguyen Van Tho (2006), Cdc benh ky sinh triing vd benh ngi sdn khoa thirdng gap a lgn vd bien phdp phdng tri, Nxb Nong nghiep Ha Npi, tr 62 - 68.
4. Pban Tbi Hong Phiic (2007), "Mpt s6 dac diera dich te va thir nghiem thuoc Praziquantel dieu tri benh san la rugt Ign a Thai Nguyen", Tap chi Khoa hoc & Cong nghe, so 2 (42), tr 85 -88
5. Nguygn Nhu Thanh (2001), Dich ti hgc thu y, Nxb Nong nghiep Ha Npi.
6. Nguygn Van Thp (2005), Khdo sdt mgt so dac diem sinh hoc, dich te hgc, bien phdp pbong trif Fasciolopsis buski a lan vimg Dong bang song Hong, Luan an Tien sT Nong nghiep, Dai hgc Nong nghiep Ha Ngi.
Ngay nhan I2-6-20I9 Ngay phan bien 27-7-2019 Ngay dang I-II-20I9
