Allergic dermatitis by Dirofilaria repens in a dog: clinical picture and treatment

Rocconi, Francesca, Di Tommaso, Morena, Traversa, Donato, Palmieri, Chiara, Pampurini, Fabrizio and Boari, Andrea (2012) Allergic dermatitis by Dirofilaria repens in a dog: clinical picture and treatment. Parasitology Research, 111 1: 493-496. doi:10.1007/s00436-012-2833-x

Author Rocconi, Francesca
Di Tommaso, Morena
Traversa, Donato
Palmieri, Chiara
Pampurini, Fabrizio
Boari, Andrea
Title Allergic dermatitis by Dirofilaria repens in a dog: clinical picture and treatment
Formatted title
Allergic dermatitis by Dirofilaria repens in a dog: clinical picture and treatment
Journal name Parasitology Research   Check publisher's open access policy
ISSN 0932-0113
Publication date 2012-07
Sub-type Article (original research)
DOI 10.1007/s00436-012-2833-x
Volume 111
Issue 1
Start page 493
End page 496
Total pages 4
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2013
Language eng
Formatted abstract
Adult stages of Dirofilaria repens (Nematoda, Filarioidea) reside in the subcutaneous tissues of the definitive or occasional host as dogs, other animals, and humans, and it is transmitted by mosquitoes. Canine infections with adults and circulating larvae of D. repens are often considered asymptomatic, although in some cases, the parasite causes subcutaneous nodules, diffused dermatitis, skin lesions, and itching. This report provides a complete clinical description of an unusual case of allergic diffused dermatitis caused by D. repens in a naturally infected dog and its successful treatment with the use of a spot-on solution containing imidacloprid 10%/moxidectin 2.5%. The dog presented multiple pustules and alopecic areas with lichenification, hyperpigmentation, and erythematous scaling margins without pruritus. Histological examination was compatible with allergic dermatitis. After being unsuccessfully managed for suspected food hypersensitivity, with a significantly worsening of the lesions, a Knott’s analysis detected nematode larvae in the blood. Morphological and molecular identification showed them to be D. repens. The dog was then treated with a single administration of a spot-on formulation containing imidacloprid 10%/moxidectin 2.5%, and the dermatological signs completely resolved within 2 months after treatment. The dog showed no recurrence of the lesions, and no circulating microfilariae were found upon microscopic and molecular examination for six consecutive months after treatment. This report indicates the apparent primary role of D. repens in causing hypersensitivity-like skin disease without pruritus in a dog. It also confirms, as recently shown elsewhere, the efficacy of imidacloprid 10%/moxidectin 2.5% in the treatment of dermatitis caused by D. repens.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Veterinary Science Publications
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Citation counts: TR Web of Science Citation Count  Cited 13 times in Thomson Reuters Web of Science Article | Citations
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Created: Sat, 20 Oct 2012, 09:04:06 EST by Chiara Palmieri on behalf of School of Veterinary Science