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

Coia, Mark E.; Hammond, Gawain; Chan, Daniel; Drees, Randi; Walker, David; Murtagh, Kevin; Stone, Janine; Bexfield, Nicholas

Authors

Mark E. Coia

Gawain Hammond

Daniel Chan

Randi Drees

David Walker

Kevin Murtagh

Janine Stone

Nicholas Bexfield nick.bexfield@nottingham.ac.uk



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.

Journal Article Type Article
Journal Veterinary Radiology & Ultrasound
Print ISSN 1058-8183
Electronic ISSN 1740-8261
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 58
Issue 5
APA6 Citation Coia, M. E., Hammond, G., Chan, D., Drees, R., Walker, D., Murtagh, K., …Bexfield, N. (in press). Retrospective evaluation of thoracic computed tomography findings in dogs naturally infected by Angiostrongylus vasorum. Veterinary Radiology and Ultrasound, 58(5), doi:10.1111/vru.12505
DOI https://doi.org/10.1111/vru.12505
Keywords angiostrongylosis, Angiostrongylus vasorum, canine, computed tomography, CT
Publisher URL http://onlinelibrary.wiley.com/doi/10.1111/vru.12505/abstract
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This is the peer reviewed version of the following article: Coia ME, Hammond G, Chan D, et al. Retrospective evaluation of thoracic computed tomography findings in dogs naturally infected by Angiostrongylus vasorum. Veterinary Radiolology & Ultrasound. 2017, which has been published in final form at http://onlinelibrary.wi.../doi/10.1111/vru.12505. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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