Johnes Control Flashcards
1
Q
Johnes
A
Mycobacterium avium s. paratuberculosis
2
Q
Humans
Crohne’s
A
Link with MAP
Source dairy
3
Q
Clinical Dz
A
> 3 yo
After stress (calving)
Profuse D+ (bubbles)
Weight loss
Individuals bright
4
Q
Importance
A
Poorer yield
RF - mastitis + lame
+ other GI Dz
5
Q
Transmission
A
80% <4wks/o
In utero/ Env (faeces)
6
Q
Stages
A
1 - silent calves
2 - sub clin shedder
3 - early clin Dz
4 - Adv Dz
7
Q
Dx
A
Faecal culture/ PCR
ELISA
30 cow screens (herd)
- milk/ blood ab
Falce -ve avian TB test
8
Q
Control strategy
A
Biosecurity protect and monitor
Improved management
Strat testing
Culling
Breed to terminal sire
Firebreak vax
CHeCS accreditation
