Coccidiosis of Ru- Eimeria

Question 1

causes:

Answer 1

bovis and zuernii mainly

There are 21 different species

Question 2

Sample and method

Answer 2

Fresh faecal sample
Flotation with ZnSO4
OPG

Question 3

Diagnosis

Answer 3

Schizonts and merozoites in in mucous/ bloody faeces
**Unsporulated oocysts in faecal sample

Sidenote: if schizogony is more patho- symptoms before oocysts shedding (zuernii)
if gametogony more patho- symptoms simulataneouly with oocyst shedding (bovis)

Question 4

Difference between bovis and zuernii (morph etc)

Answer 4

Zuernii: Many schizonts and merozoites formed- bloody stool before oocysts are excreted.
Oocysts are smaller

Bovis: Many gamonts are formed- oocysts are passed in the faeces, oocysts are bigger

Question 5

Additional info

Answer 5

Almost all animals carry some Eimeria
Young/immunicompromised are usually the. most heavily infected
Sheep and goat have a lot of mixed forms in their faeces- usually asymptomatic!

Question 6

Development/ Life cycle

Answer 6

1) small schizonts only
2) large schizonts= globidia
-1st gen are large
2nd gen are small

In both cases.. the schizonts then become gamonts and then oocysts in the mucosa

Oocysts are usually visible with RBC’s surrounding

Question 7

Patho signs: E. bovis

Answer 7

LI: catarrhal to diptheroid enteritis
Desquamation of mm
Necrosis of ep
The globidium/macroschizonts may be visible with the naked eye

Question 8

Clinical signs (usually subclinical)

Answer 8

anorexia/ fever
Bloody viscous Dx- blood and mucus are shed together
Rectal prolapse
Weight loss