Onchocerca sp. in an imported Zangersheide gelding causing suspensory ligament desmitis

A 5‐year‐old imported Zangersheide gelding was evaluated for SC swellings over both forelimbs and lameness localized to the distal metacarpus. Ultrasound examination of the SC masses was compatible with verminous granulomas. Linear hyperechoic foci were present within the suspensory ligament branche...

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Bibliographic Details
Published in:Journal of veterinary internal medicine Vol. 37; no. 2; pp. 735 - 739
Main Authors: Brown, Kara A., Johnson, Amy L., Bender, Susan J., Nolan, Thomas J., Pfisterer, Bianca, Slack, JoAnn, Willis, Elinor, Rule, Emily K.
Format: Journal Article
Language:English
Published: Hoboken, USA John Wiley & Sons, Inc 01.03.2023
Wiley
Subjects:
Animals
Arthritis - veterinary
Biopsy
Case Report
dexamethasone
EQUINE
granuloma
Granulomas
Horse Diseases - diagnostic imaging
Horse Diseases - drug therapy
Horses
infectious
Infectious diseases
ivermectin
lameness
Ligaments
Ligaments - pathology
Male
metacarpus
Muscular Diseases - pathology
Muscular Diseases - veterinary
necropsy
Onchocerca
onchocerciasis
Onchocerciasis - diagnosis
Onchocerciasis - parasitology
Onchocerciasis - pathology
Onchocerciasis - veterinary
parasite
ultrasonics
ultrasound
veterinary medicine
Warmblood
United States > US
infectious
parasite
ultrasound
Warmblood
ISSN:0891-6640, 1939-1676, 1939-1676
Online Access:Get full text
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Summary:A 5‐year‐old imported Zangersheide gelding was evaluated for SC swellings over both forelimbs and lameness localized to the distal metacarpus. Ultrasound examination of the SC masses was compatible with verminous granulomas. Linear hyperechoic foci were present within the suspensory ligament branches of both forelimbs, suggestive of ligamentous parasitic infiltrates. A diagnosis of onchocerciasis was confirmed on biopsy of a SC mass. The gelding was treated with ivermectin and a tapering course of PO dexamethasone but was eventually euthanized. Necropsy confirmed the presence of SC eosinophilic granulomas and degenerative suspensory ligament desmitis, both with intralesional nematodes. Given the location and appearance of the nematode, a diagnosis of Onchocerca sp., most likely O. reticulata, was made. Onchocerciasis should be included as a differential diagnosis for multifocal suspensory ligament desmitis with these sonographic characteristics when paired with SC masses in imported European Warmbloods.
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ISSN:0891-6640
1939-1676
1939-1676
DOI:10.1111/jvim.16653