Habronemiasis

Question 1

What is habronemasis

Answer 1

Parasitic disease that results from aberrant cutaneous migration of nematode larvae.

Question 2

What does this cause in the horse? Aka how do you describe the lesions?

Answer 2

Cutaneous ulcerative granulomas

Question 3

What is the intermediate host?

Answer 3

Flies - Musca domestica, stomoxys calcitrans

Question 4

What causes habronomiasis

Answer 4

3 nematodes: habronema muscae, habronema majus, draschia megastoma

Question 5

Prevention?

Answer 5

Regular deworming (ivermectin)
Good fly control

Question 6

Where do adult nematodes live?

Answer 6

Stomach of horse

Question 7

Common name for habronomiasis

Answer 7

Summer sores

Question 8

Is this disease pruritic?

Answer 8

Can be very pruritic in some horses due to hypersensitivity reaction

Question 9

Where do lesions normally develop?

Answer 9

Moist areas - medial canthus, vulva, teats, wounds, nostrils, lip commissure

Question 10

Treatment?

Answer 10

Lesions resolve by end of summer
Topical therapy with ivermectin/glucocorticoid
Systemic anti-histamines or glucocorticoid may be necessary

Question 11

Diagnosis?

Answer 11

Deep skin scrape or smear from lesion may show nematode.

Can see them on biopsy