Ulcerative lymphangitis

1. Ulcerative Lymphangitis
Synonym : Ulcerative cellulitis
Caseous lymphadenitis

2.  It is an infectious disease of
cattle and horse
characterized by formation of
skin ulcers with involvement of
lymph vessels of lower limbs.

3. Etiology :
 Corynebacterium pseudotuberculosis
The organisim is
Pleomorphic,
non motile,
non-spore forming,
non-capsulated,
gram positive rod
 Corynebacterium equi
 Psudomonas aeruginosa

4. Corynebacterium pseudotuberculus

5. Susceptible Hosts:
 Primarily – a disease of horse
But sometimes
Also occurs in cattle

7. Ulcerative lymphangitis

9. Transmission and pathogenesis:
 Disease is related to soil contamination.
 Organisim may remain on skin as
contaminants.
 Through abrasion or skin injuries –
invade the tissues , multiply – invade
the lymphatic vessels – formation of
abscess.

10. Clinical findings:
 The disease is sporadic in nature and
spreads slowly.
 It begins as a moderate diffuse swelling on
one or both the limbs causing lameness.
 Nodules formed on the legs break down
leading to the formation of ulcers.
 Thick greenish exudate mixed with blood
appear from such ulcers.

11. Diagnosis:
1. Clinical findings.
2. Isolation and identification of the
organisims.

12. Treatment:
1. A course of antibiotic, preferably
penicillin @ 4000 – 8000iu /kg BW.i/m
daily x 5 days
2. Surgical drainage of pus material.
3. Daily dressing of wound.

13. Control:
 Strict hygiene and sanitation.
 Regular grooming of animals.
 Prompt care and treatment of limb
injuries.

14. Sporotrichosis :
Sporotrichosis is a contagious disease
of horses
characterized by
the development of cutaneous nodules and
ulcers on the limbs
and may or may not be accompanied by
lymphangitis.

15. Etiology :
 Sporotrichum schenckii
 Gram positive fungus
 Infection spreads directly through
contaminated soil or decaying plant
materials.
 Infection may spread through direct
contact with infected animals.

16. Pathogenesis :
 Local invasion through cutaneous
wounds results in the development of
abscess and discharging ulcers.

17. Clinical findings:
 Multiple , small cutaneous nodules
develop on the lower parts of the legs,
usually about the fetlock.
 The nodules are painless, develop a
scab on the summit, discharge a small
amount of pus and heal in 3-4 weeks.

18. Diagnosis :
1. Clinical symptoms.
2. Isolation and identification of the
organisim.
3. Gram positive spores in the disharges.

19. Treatment :
1. Local application of tincture iodine daily on ulcers – dressing.
2. Oral administration of potassium iodide is beneficial.
Potassium iodide @ 2 – 3g/100kg
(4 – 8g/animal) daily orally for 10 to 14
days.
1. Or , sodium iodide (10%)solution@1gm/40kg BW or,
2. sodium – iodide @ 15 – 30 gms
in 250 – 500 ml distilled water
i/v at weekly interval for a month.
 Or, Griseofulvin @7.5-10mg/kg
BW/day for 30 days