Journal
FRONTIERS IN VETERINARY SCIENCE
Volume 7, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fvets.2020.577466
Keywords
dog; dirofilariosis; microfilaremia; immunology; natural Dirofilaria repens infection
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Funding
- Institute of Veterinary Medicine, Warsaw University of Life Sciences - SGGW
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Subcutaneous dirofilariosis in dogs, caused byDirofilaria repens, is an underdiagnosed disease, now recognized for its zoonotic potential, and growing distribution and prevalence across Europe and Asia. Our understanding of the pathogenicity in human and canine host remains unclear, but case reports suggest that microfilariae (Mf) as well as adultD. repensmay directly cause internal organs damage or may be a factor complicating the course of other ailments. The purpose of the study was to report high Mf in dogs and to discuss potential relevance with co-morbidity. Our data from a modified Knott's test performed on 62 infected dogs indicate that the median Mf count inD. repensinfections is 675 Mf/ml and we consider microfilaremia above 10,000 Mf/ml as high intensity. This collection of case reports discusses 4 cases of high intensityD. repensmicrofilaremia in companion dogs; one presenting pathology from a very high intensity of adultD. repenswith post-treatment complications, and 3 dogs in which high microfilaremia was detected incidentally during the management of other primary illnesses. To our knowledge this report describes the highestD. repensmicrofilaremia ever detected in a dog, at 178,000 Mf/ml. The issue of high microfilaremic infections in dogs is poorly studied and there is growing need to identify the presentation and understand the mechanisms of associated pathogenesis in the host-parasite relationship.
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