Download Swine Coccidians

Swine Coccidiosis
Members:Chen Hongxiu Cui Keqi
Li Xiuying Luo Chuan
Wang Ruijiao
From:Class 1 2007
Introduction of swine coccidiosis
• Coccidians parasite at intestinal epithelial
cell ,and cause pig intestinal mucosa (粘
膜)bleeding and diarrhea
Total introduction
• Definitive host: pig
• Site of infection: intestinal epithelial
cell
• Intective stage: sporulated oocyst
• Diagnosis stage:oocyst
Morphology
• swine coccidiosis origins from many
types ;
• the classifies belongs to the Sporozoa,
Eucoccidia, Eimeriina,Eimeria and
Isospora of Eimeriidae of spores and
genera.
• Generally considered pathogenic strongly
are Isospora suis、Eimeria debliecki
E.scabra、E.spinosa .
Oocysts of swine coccidians
Eimeria
One oocyst of Eimeria contain 4
sporoblasts
oocysts of Isospora suis
A Unsporulated Oocyst
C Sporulated Oocyst
One oocyst of Isospora suis contain
2 sporoblasts .
E.Debliecki and E .Scabra
Life Cycle
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•
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oocyst→
sporulated oocyst→
sporozoite →
trophozoite→
schizont→
merozoite→
gametocytes→
zygotes→
a new oocyst
• Two breeding way:
• schizogony:schizont→gametocytes
• gametogony:gametocytes→zygotes
• Two kinds of living environment:
• one is feces:oocyst→sporulated oocyst
• the other is intestinal epithelium :
• sporulated oocyst→zygotes→ a new
oocyst
Epidemiology
• The disease occurs in only piglet.older
pigs may get more recessive infection.As
the oocyst development needs the higher
temperature, so the disease occur in late
spring and summer
• sources of infections: Infective pigs
and feces.
Routes of infections
This disease is the main gastrointestinal
dissemination way.
• When oocysts in a waste, pollution
eliminated from the feed, water, soil sac or
equipment etc, in suitable temperature and
humidity piglets will get infectious
incubation（潜伏） by the oocysts
Symptoms
• Diarrhea.
• Feces yellow to gray. Beginning feces
loose or show paste, as the illness grew
worse due to a liquid, occasionally feces
three stylistically brown; And often sticks
full liquid waste, and will be issued
corruption milk samples calculate stink.
Coat coarse disorderly, dehydration,
angular, increase weight slowly.
• A high incidence, mortality is low
Isospora suis
• 等孢球虫感染猪的
小肠，粘膜上皮发
现的裂殖体形成裂
殖子
Lesions
• Piglets records variation is mainly
chordapsus, confined by open-stope
and ileum, sometimes visible necrotic
enteritis, pseudomenbrane loosely
adherent in hyperemia of mucous
membrane.
黏膜坏死病变的肠粘膜有撒糠样的伪膜
Diagnosis
• Clinically 7-21 age of piglets occurrence
diarrhoea, after using common antibiotics
therapy failed, a suspect about coccidiosis
comes.
• fecal method:flotation method
• Scrape off jejunum and ileum mucous
membrane, wipe piece dyed, find made of
endogenous growth phase worm
body(merozoite、schizont、gametocyte)
球虫病组织学变化小肠粘膜上见不同成熟期
的球虫和小配子体、大配子体及卵囊感染
Treatment&Prevention
• Coccidiostat:Toltrazuril
• Prevention:
• 1、Disinfect the maternity ward：With
formaldehyde, glutaraldehyde,ethylene oxide
ethane fumigation method disinfection, or basin
of peracetic acid fog method, heating flame
method disinfection
• 2、With amprolium feeding pigs can have good
prevention effect
• Inactivation treatments of feces
陈红秀
罗川
崔可琦 黎秀英
王睿姣