benh ki sinh trung o dvts

8/12/2019 Benh Ki Sinh Trung o DVTS

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BNH K SINH TRNG VTS

Bnh do ng vt n bo k sinh(Protozoa)

Bnh do giun sn k sinh:

- Do giun dp k sinh Plathelminthes- Do giun trn k sinh- Nemathelminthes

- Do giun u gai k sinh-Acanthocephala

- Do giun t-Anelida

Bnh do gip xc (Crustacae) k sinh


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BNH DO NG VT N BOK SINH VTS

Ngnh Mast igophora Diesing,1866

Ngnh SporozoaLeuckart,1872

Ngnh Microspor id iaBalbiani,1882Ngnh Cnidospor id iaDoflein,1901

Ngnh Ci l iophoraDoflein,1901


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Ngnh Mast igophoraDiesing,1866 k sinh VTS

- Trng roi c 2 lp:Trng roi thc vt (Photomastigina)Trng roi ng vt (Zoomastigina).

- Trng roi k sinh VTS thuc nhm d dng).

- Trng roi rt a dng, c th c dng hnh qu l, hnh budng, hnh thoi di...,- C quan vn ng, ca trng roi l cc tin mao (flagellate),

cng c th l c quan bm ca trng khi k sinh, c t1,2,4,6,7 hay nhiu tin mao to dng hnh r cy.

- Trng roi thng sinh sn = phng php phn i theochiu dc- C th sng t do, mt s t sng k sinh da, mang,

mu ca c, gip xc


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Bnh trng roi mu c-Trypanosomosis

Tc nhn gy bnh

B Trypanosomidea Grasse, 1952.H TrypanosomidaeDoflein,1911GingTrypanosoma Gruby, 1841- C th Trypanosomanh, di

khong 38-54 m, chiu rng 1,2

- 4,6 m,- gia c th ln, 2 u nh, c

1 roi xut pht t pha sau, chydc thn v pha trc, to nncc mng un.

- Mi khi vn ng c th rt hotbt nhng t thay i v tr. Hchca t bo hnh bu dc chnhgia c th. Trypanosomak sinh mu c


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Hnh thc sinh sn ca trng mu:

a c

Sinh snv tnh

nhiu Trngmu mi


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Phn b

- Trypanosomak sinh trongmu, mt ca nhiu loi cnc ngt, nc bin.

- Ngoi ra, ngi ta cn phthin ra trng mu k sinh mt s ng vt trn cn

- Cc loi Trypanosmak sinhtrn c bin c kch thc lnhn k sinh c nc ngt.

chn on- V du hiu bnh l thng

khng r rng nn kh chn

on bng mt thng.- chn on bnhTrypanosomaphi dngphng php ly tm mu, sau quan st di knh hin vi.


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Bnh trng roi k sinh mang da c-

(Cryp tob iosis v Ich thyobodos is)

Tc nhn gy bnhB BodonideaHolland,1895

H Bodonidae Stun, 1878

Ging Cryptobia Leidy, 1846

- C th hnh thun, ngn

- C 2 tin mao c gc phatrc c th. 1 ci hngv trc, 1 ci hng v

sau to vi c th 3-4 mngun


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Bnh trng roi k sinh mang da c-(Cryp tob iosis v Ich thyobodos is)

Ging Ichthyobodo Pinto,1928

(Syn: Costia Leclerque,1890

- C th c hnh cu, trng,

qu l, c khe ming.- C 2 tin mao bt u tpha trc, theo rnh minghng v sau.


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Du hiu bnh l:- C b cm nhim trng roi c

t chc mang mu nukhng bnh thng,

- Da v mang c nhiu dch

nhn. Roi sau cm su vo tchc k ch ng thi c thtit ra cht c ph hoi tchc t bo k ch.

- C b bnh thng c cmgic nga nn vn ng rtbt trng trong ao.

- Khi bnh nng hot ng yu,c th c mu sc en dn, vikhun v nm theo vt thngxm nhp vo c th.

Phn b:- Cryptobia v Ichthyobodo k sinh trn

mang, da cc loi c nc ngt: cchp, c m trng, c m hoa, c trmc, c tra v nhiu loi c nc ngt.

- C cng nh cng d b cm nhim v

gy tc hi ln hn c ln.- Cryptobialu hnh mnh vo maxun h l ma c nhit m p

- Vit Nam, pht hin Cryptobiabranchialis, Cryptobia agitatavIchthyobodo necatrixk sinh trn mang,da

- Ti Trung Quc, Cryptobiagy tc hinng cho c hng, c ging.- Theo A.K.Serbina,1973 giai on c

hng, c ging b cm nhimIchthyobodo trong vng 5 ngy c cth b cht 95%, thm ch c ao t lcht ln n 97%.


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Phng php phng tr bnh:

- Dng CuSO4 nng 3-5 ppm tm 15-30 pht,

- Dng CuSO4phun xung ao nng 0,5-0,7 ppm.

- Dng NaCl 2,5-5% tm cho c con (t 10-15 pht),- Dng Formol 1/4000 tm cho c bnh trong 1 gi.


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Bnh Oodiniossis mang, da c bin

Tc nhn gy bnh:- Tc nhn l mt KST thuc lpDinoflagellata: Oodinium spp,

- C dng hnh bu dc, trng, qu l,tin mao nm pha trc, bm chc vom ca c th k ch khi k sinh

Du hiu bnh l:- C b bnh do Oodinium sppthng

xut hin mu vng nu trn mang,da, c bit mp u cc t

mang, lm mt i mu ti cat mang.

- C b bnh c hin tng cht rirc v hng lot.


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Bnh Oodiniosis mang, da c bin

c im phn b:- Bnh Oodiniosis thng xy ra

cc loi c bin, c bit ccloi c phn b rng san h.

+ Baticados, 1984 gp c i

-Mulgi cephalus.

+ Chiu-yuan Chien gp bnhny c m

+ Vit nam gp nhiu c cnh

bin nui gi mt s c skinh doanh,


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Bnh Oodiniosis mang, da c bin

Phng php chn on- Da vo du hiu chnh- Kim tra bnh phm ly t

mang, da, vy cbnh bngknh hin vi.

Phng php phngbnh:

-p dng cc bin phpphngchung

Phng php tr bnh:

- th nhiu loi ha chtkhc nhau, nhng ch cFormol l c hiu qu tr bnhny. C th phun formol vob ngm c vi nng

20-40 ppm trong 12-24h.- Hoc c th dng nng

cao 100-300 ppm tm cbnh trong thi gian 10-15pht.


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Bnh trng bo t Goussios is

Tc nhn gy bnh:B Coccida Leuchart 1879H Eimeridae Leger 1911Ging Goussia Labbes, 1986- Non bo Goussiathng c

dng hnh cu, kch thckhong t 8-14 m.- Bn ngoi bo nang c mt vkitin cng v trong sut baobc.- Trong bo nang c 4 bo t

hnh bu dc, cng c 1 v kitinbc tng non bo t.- Mi bo t li c 2 trng bot hnh dng di, 1 u to, 1u nh, xp ngc nhau.

Non bo t ca Goussia


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Bo t trng k sinh trong nimmc thnh rut cac


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Sinh sn v chu k pht trin

- Sinh sn v tnh: to ra cc littrng lm thng tn nghimtrng cc t bo nim mc rut

- Sinh sn hu tnh: To ra ccsn phm sinh dc mang tnhc v ci, hp t s pht trinthnh non bo mi.

- Cc non bo c th theo phnra mi trng v cm nhim voc khe theo con ng thc n

Hnh thc sinh sn v chu kpht trin ca bo t trng


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Bin php phng tr:- phng bnh, cn ch cc bin php nh lm tt cng tc ty

dn ao, dng vi nung (CaO) ty ao trc khi th c.

- Trung Quc cn c th dng bt lu hunh v Iode cha bnhbo t trng cho c c bnh.

Liu dng 1,2 gram Iode hoc 50 gram bt lu hunh cho 50kg khi lng c, cho n lin tc trong4 ngy.


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Bnh trng hai t bo Gip xc-Gregar inosis

Chu k pht trin ca ng vt nguyn sinh c 2 t bo

Bo t(Spore)

Ht bo t(Spororoite)

Th dinh dng(Spororoite)

Bo t(Spore)

Kn giao t(Spororoite)

c

ci

Hp t(Zygote)

Kn giao t(Sporocyste

Theo

T

Ra Mt

nc

KS rut caMollusca

Di chuyn xung

rut sau


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Du hiu bnh l:- Gip xc b bnh th hin km

n, chm ln, mm v, p

thn, sinh vt bm phy.- on rut trc c th xut

hin mu vng nu v phnh todo nhim Gregarine

- C bo co cho rng KST nylin quan ti bnh phn trng tm s nui Vit Nam


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Phn b ca bnh:- Cm nhim V khng xng

sng: Gip xc v V thn mm.

- Bnh ny khng xy ra giai on

tm ging trong tri ging.- Tm ging a ra ao t khong 10

ngy pht hin c bnh ny.

- Gp nhiu ni trn th gii.

Bin php phng tr:

- Phng bnh: Dit ng vt thnmm trong ao nui gip xc

- Tr bnh: Cha c thuc c tr.C th dng thuc Gregaxinca cng ty CP, dng trn vothc n theo liu hng dnca nh sn xut, c tc dngtr bnh, nu nhiu tm trong

ao cha b n.


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TRNG VI BO T MYCROSPORIDIA

c im chung:- Ngnh vi bo t l ng vt n bo rt nh,- L k sinh trng ch yu ni k sinh,

- K sinh nhiu V: Cn trng, gip xc, c,

- pht hin 800 loi thuc 70 ging.- C khong 70 loi thuc 7 ging, thng k sinh t

chc tuyn sinh dc, gan, thn, mt, rut, t chc m, dav mang c .

- C khong 30 loi vi bo t k sinh v gy bnh gipxc, lm gim sinh trng, pht trin v gim gi trthng phm ca VTS.


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Bnh vi bo t c - Glugeosis.

Tc nhn gy bnh

B Glugeida Issi,1893H Glugeidae Gurley,1893

Ging Glugea Thelohan1891

- C th ca Glugea rt nh: 3-6m x 1-4 m,

- Hnh trn hay hnh bu dc.- Cu to c th rt n gin, bn

ngoi c mng do cht kitin tothnh, c cc nang hnh dngging bo t, bn trong c sit.

- Trong t bo cht ca bo tnh c hch hnh cu v tbo cht cng c hnhcu


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Bnh vi bo t c - Glugeosis.

Du hiu bnh v phnb:

Glugea k sinh thn, rut,tuyn sinh dc v t chc m,da ,mang ca cc loi c nc

ngt v nc mn, nh c m,c chp, c dic, c vn, cm...

Khi k sinh trong t chc cquan, thng c dng bo

nang mu trng sa, ngknh 2-3 mm. Lc cm nhimnghim trng c th lm tuynsinh dc pht trin khng tt,c sinh trng chm.

Bnh nng c th gy cht c


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Bnh vi bo t gip xc(Cotton shrimp disease)

Du hiu bnh l- Cc vng c vn, hay m ca

mt s t chc c quan b nhimc mu trng c.

- Hin tng trng c d nhn bitnht khi chng xut hin ti vng

c vn mt lng ca phn bng.- Khi bnh nng, mu trng c cth xut hin nhiu ni trn cth.

- Nu bnh xut hin tm utrng, di knh hin vi cho thynhiu vng c vn ca u trng

xut hin s c m.- Bnh phm thu ti cc m c b

nhim vi bo t chim ch trongcc m t bo b hoi t


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Chn on bnh- Da vo cc du hiu c m

c, cc c vn chuyn sangmu trng c.

- Ngoi ra c th kim tra bnhphm ly t vng c trng cdi knh hin vi phngi > 400x.

Bin php phng bnh- Khng dng tm b m nhim vi

bo t tham gia sinh sn trongcc tri ging,

- Trong ao nui tm thng phm,

cn pht hin sm loi bnhng con tm b nhim vi bot ra khi qun n,

- Dit ch hi l c trong cc aonui tm bng vi CaO khi tydn, hay dng saponin khi chonc vo ao.

Bnh vi bo t gip xc(Cotton shrimp disease)


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Bnh do trng c ng ht

LpSuctoria

BAcinetidaHAcinetidae

GingAcineta

H DendrosomatidaeGing Tokophrya

Lp Exogennida

H PodophyridaeGing Podophyria

BTrichophryida

HTrichophryidaeGingCapriniana


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Bnh do trng c ng ht

Ging Capriniana

Phn b ca bnh:- Capriniana k sinh trn

da, mang ca c chp, cm, c tri,..

- Ch yu KS gia onc con (c hng, cging).

- C bnh ni ln mt

nc, gy yu v c thcht ri rc.


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Bnh do trng c ng ht

- GingAcineta, sinh trn ipxc: cua, tm.

- giai on u trng gipxc, trng ng ht c thgy cht u trng.

- Tokophrya kt hp vi trngloa kn k sinh da ba baging lm chng c thcht

- Acineta k sinh vi mc rt cao trn n tm tht 1thng tui ti Nha Trang, gy cht ri rc.Tuy vy hintng ny t gp.

GingAcineta


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Bnh do trng c ng ht

Ging Tokophrya


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Bnh do trng c ng ht

- Ging Podophrya cdng hnh cu vi ccng ht phn b dng

phng x khp t bov hng ra xungquanh. Trong t boc nhiu ht vt cht

dinh dng.- Cung bm kh di

Ging Podophrya

BNH DO NGNH BO T SI


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BNH DO NGNH BO T SICNIDOSPORIDIA

Tc nhn gy bnh:

- Trng bo t si c bo vbng 2 hay nhiu mnh v ckch thc, dy bng nhau,do t bo cht keo c li m

to nn.- Hnh dng bo t rt a dng, l

mt cn c phn loi.

- Mt s ging loi tn ti dng bo nang trng c, kch

thc 0,5-1,0 mm

BNH DO NGNH BO T SI


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Ging Myxobolus sp


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Ging Thelohanel lus spp

BNH DO NGNH BO T SI


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Ging Ceratomyxa sppk sinh mt c m


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BNH DO NGNH BO T SI CNIDOSPORIDIA

Du hiu bnh l:- Khi c mc bnh trng bo t

si, c bi li khng bnhthng, hay quy mnh, d hnhcong ui, c km n ri cht.

- Nu b bnh nng c th nhn

thy nhng bo nang bng httm, ht u xanh mu trngc bm trn mang c, c thlm xng np mang khngche kn mang.


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BNH DO NGNH BO T SI CNIDOSPORIDIA

c im phn b:- L cc k sinh trng ni v

ngoi KS- Cc c quan k sinh: mang,

rut, mt, no, ty sng.- Gp c nc ngt v mn.- Nhng c n y v sng y

b cm nhim cao hn- Bnh xy ra nng trong cc aong c ging

Phng tr bnh- Cho n nay vn cha c

thuc cha tr, ch yu pdng cc bin php phngbnh tng hp l chnh:

- Ao ng c ging (nht l cchp) phi c ty bng vinung (CaO) liu cao 14 kg/100

m2, phi y ao t 3 - 7 ngy git cc bo t trong bny ao, hn ch kh nng gybnh ca c ging.

- Khng th nui c con bbnh. Khi bnh xy ra cn dit

ton b c trong ao, ginguyn nc ao, dng vinung nng cao khtrng


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Lp sn l n ch-Monogenea

c im chung:- C hnh l, hnh si dp v mnh,

kch thc thng rt nh.- Hu ht ging loi l KST ngoi k

sinh (mang, vy, da) V sng nc.

- C quan bm rt pht trin,thng l cc thy, gic bm pha trc v mt a bm ln pha sau, trong c nhiu gai haycc van bm bng kitin.

- C quan tiu ha khng honchnh, khng c rut sau.

- C quan sinh sn lng tnh.- C chu k pht trin trc tip,

khng qua k ch trung gian

Hnh dng cu to ca Dactylogyrus


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u trngc timmao

Chu k pht trin ca Monogenea

Lp sn l n ch Monogenea


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1. Monogenea k sinh

mang ca c:- C bnh thng c hin

tng l , ni u,sng mang, mang tit

nhiu dch, c cht tri rc ti hng lot khicng nhim cao


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Lp sn l n ch-Monogenea Mt s ging sn l n ch k sinh mang c:

Ging Silurodiscoides Gussev, 1976Ging NotopterodiscoidesLim et Furtado, 1986Ging MalayanodiscoidesLim et Furtado, 1986Ging Cornudiscoides Kulkarni, 1969Ging Trianchoratus Prise et Berry, 1966Ging PseudodactylogyrusGussev, 1965Ging BychowskyellaAchmerov, 1952Ging QuadriacanthusPaperna, 1961Ging CichlidogyrusPaperna, 1960GingAncyrocephalus(S.l) Creplin, 1939Ging Dactylogyrus

Ging Ging Pseudorhabdosynochus


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sn l n ch k sinh mang c


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Mt s ging sn l n ch k sinh da ca c


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c im phn b:- Sn l n ch k sinh c ncl, mn v ngt.

- Thng k sinh da hoc mangc

- Tc hi ca bnh ph thuc vocng v t l cm nhim caohay thp.

- Bnh pht trin mnh vo ma cnhit t 20-300C- ma xun hv thu ng MB v ma ma

MT v MN.- C nui ao hay lng b u b

nhim


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