Participants:林宇洲，王千一，王子文，杨哲宇
Speaker：杨哲宇
SWINE COCCIDIA
猪球虫
2008级动物医学3班
1.introduction
Swine coccidium, an parasitic
protozoa, parasitize in small
intestine of pigs, causes the
coccidiosis of pigs.
The disease occurs mainly in
piglets at 7 ~ 11 days age.
华山宿舍2栋413室出品
华山宿舍2栋413室出品
Morphology
Toxonomy: Sporozoa, Eucoccidia, Eimeriina,
Eimeriidae Eimeria and Isospora.
Coccidia: 17 species, five of them are still
controversial.
Common species: I. suis
E. debliecki, E. scabra and E. spinosa.
Swine coccidium belong to Genus Eimeria and Isospora.
华山宿舍2栋413室出品
The oocysts of Isospora suis contain 2 sporoblasts .
The oocysts of Eimeria contain 4 sporoblasts .
猪等孢球虫含2个孢子囊，艾美球虫则含4个孢子囊。
Isospora suis（猪等孢球虫）
Eimeria艾美球虫
华山宿舍2栋413室出品
华山宿舍2栋413室出品
Life cycle
The general form of swine
coccidian life history is represented
by the genus/sospora. This life
history includes both asexual and
sexual multiplication. Sexual
multiplication culminates in the
formation of oocysts, which are
discharged with the feces.
Epidemiology
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For clinically significant disease to occur, piglets need to be
infected with relatively high numbers of oocysts
Oocysts are resistant to drying and most disinfectants
Most piglets are infected by oocysts carried over from
previous litters
Once the piglet starts scouring, the intestinal wall is
damaged, and treatment will not work effectively.
Symptoms
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Acute
Scour(腹泻) tends to occur in individual pigs from
approximately 6 days of age, but most of the litter scour at 8-10
days. At the start of scouring, vomiting may be seen.
Scour ranges from white to pasty cream feces through to a
yellowy watery scour.
Piglets tend to be in poor condition, hairy and growing more
slowly than other piglets within the litter
Mortality rates reach 20% in acute cases
Subclinical
Most farms will have coccidosis at a low level affecting piglet
performance
Lesions
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The main pathological changes of piglet coccidiosis
is acute enteritis, confined to the jejunum and ileum,
visible serious enteritis, yellow cellulose necrotizing
pseudomembrane loosely attached to the mucosal
surface.
华山宿舍2栋413室出品
华山宿舍2栋413室出品
Gross lesion
Microscopic lesion
华山宿舍2栋413室出品
Diagnosis
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According to the main symptom diarrhea and piglet age at 7
to 14 days age, and this kind of diarrhea treated invalid with
antibiotics
Differential diagnosis: other pathogens caused piglet diarrhea,
such as E. coli, infectious virus, rotavirus, Strongyloides
sterocoralis.
华山宿舍2栋413室出品
Treatment and Prevention
（1）Treatment:
Treat with Baycox(百球清) an oral
preparation given at 4 and 10 days of age.
Sulfonamides(磺胺) may also be used as
treatment.
华山宿舍2栋413室出品
(2)Prevention
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Clean the farrowing house(分娩房) with an coccida disinfectant
such as Oocide (Antec International)
Reduce/cease cross-fostering(寄养) after 2-3 days of age
Sows should be washed/disinfected before entering the farrowing
house
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Use separate brushes, forks, shovels in each farrowing room
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Control flies
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Reduce draughts(賊风) and other environmental stress factors
华山宿舍2栋413室出品
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林宇洲，王千一，王子文，杨哲宇