2008 级动物医学 3 班

SWINE COCCIDIA 猪球虫

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

Morphology华山宿舍 2 栋 413 室出品

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

Isospora suis（猪等孢球虫）

Eimeria艾美球虫

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。

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.

华山宿舍 2 栋 413 室出品

Epidemiology 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 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 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

华山宿舍 2 栋 413 室出品

Microscopic lesion

Diagnosis 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 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 Use separate brushes, forks, shovels in each farrowing

room Control flies Reduce draughts(賊风 ) and other environmental stress

factors华山宿舍 2 栋 413 室出品

林宇洲，王千一，王子文，杨哲宇

欢迎观看