Brachyspira and lawsonia

Question 1

characteristics of lawsonia

Answer 1

• obligate intracellular parasite
• level 2
• lives in enterocytes of hosts

Question 2

characteristics of brachyspira

Answer 2

• gram negative
• level 2
• aerotolerant anaerobe
• squiggly rods
• des not usually create colonies, hard to grow
• varying hemolysis
• found in GIT

Question 3

lawsonia intracelularis

Answer 3

host: pig, horse, hamster
dz: proliferative enteropathy
chronic occurs in post weaned pigs - subclinical
acute 4-12 months
- CS: hemorrhagic, back tarry feces
lesions occur in the distal ileum and proximal colon
- corrugated ridges

Question 4

B.hyodysenteriae and B. hampsonii

Answer 4

host: pigs
dz: swine dysentry
- mild watery-mucohemorrhagic diarrhea
most common in older pigs
don’t really know how to control it

Question 5

B. pilosicoli

Answer 5

host: pig
dz: spirochetal colitis, wet cement feces without blood
self-limiting
control:
- antimicrobials
- good management

Question 6

Brachyspira spp.

Answer 6

host: avian
dz: GIT problems
- different levels of diarrhea

Question 7

treponema spp.

Answer 7

host: cattle
dz: digital dermatitis
likely a polymicrobial infection
suggests management problems
tx: topical cleaning (mild)
topical antibiotics (severe)
- oxytetratcycline, lincomycin/spectinomycin

Question 8

treatment of lawsonia

Answer 8

penicillins, bacitracin, aminoglycosides, virginiamycin, and ionophores are ineffective

use macrolides /pleuromutilins

Question 9

treatment of brachysipra

Answer 9

macrolides ( lincomycin, tylosin, tylvalosin) and pleuromutilins