Retrospective evaluation of thoracic computed tomography findings in dogs naturally infected by Angiostrongylus vasorum

Coia, Mark E. and Hammond, Gawain and Chan, Daniel and Drees, Randi and Walker, David and Murtagh, Kevin and Stone, Janine and Bexfield, Nicholas (2017) Retrospective evaluation of thoracic computed tomography findings in dogs naturally infected by Angiostrongylus vasorum. Veterinary Radiology & Ultrasound . ISSN 1740-8261

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Abstract

Angiostrongylus vasorum (A. vasorum) is an important emerging disease of canidae. Cardiorespiratory signs are common in affected dogs, therefore thoracic imaging is critical for diagnosing andmonitoring disease. Descriptions of thoracic computed tomography (CT) findings in dogs naturallyinfected with A. vasorum are currently lacking. Aims of this multicenter, retrospective study were to describe thoracic CT findings in a group of dogs with confirmed disease, determine whether any changes were consistent among dogs, and propose standardized terms for describing thoracic CT findings. Nine UK-based referral centers’ clinical and imaging databases were searched for dogs that had a confirmed diagnosis of A. vasorum, and had undergone thoracic CT examination. Eighteen dogs, from seven of the centers, fulfilled the inclusion criteria. The lung lobes were divided into the following three zones and the CT changes described in each: pleural (zone 1), subpleural (zone 2), and peribronchovascular (zone 3). The predominent abnormality was increased lung attenuation due to poorly defined ground-glass opacity or consolidation. There were regions of mosaic attenuation due to peripheral bronchiectasis. Nine/18 (50%) dogs showed hyperattenuating nodules of varying sizes with ill-defined margins. The distribution always affected zones 1and 2 with varied involvement of zone 3; this resulted in clear delineation between zones 2 and 3.Tracheobronchial lymphadenomegaly was frequently noted. Findings were nonspecific and there was considerable overlap with other pulmonary conditions. However, authors recommend that A. vasorum be considered a likely differential diagnosis for dogs with a predominantly peripheral distribution of lung changes.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: ia ME, Hammond G, Chan D, et al. Retrospective evaluation of thoracic computed tomography findings in dogs naturally infected by Angiostrongylus vasorum. Veterinary Radiol ology & Ultrasound. 2017, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/vru.12505. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: angiostrongylosis, Angiostrongylus vasorum, canine, computed tomography, CT
Schools/Departments: University of Nottingham, UK > Faculty of Medicine and Health Sciences > School of Veterinary Medicine and Science
Identification Number: 10.1111/vru.12505
Depositing User: Eprints, Support
Date Deposited: 10 Jul 2017 08:37
Last Modified: 12 Jul 2017 06:16
URI: http://eprints.nottingham.ac.uk/id/eprint/44061

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