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, Eu

coccidia, 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

• 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 me

mbrane, 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 formald

ehyde, 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 崔可琦 黎秀英 罗川 王睿姣