Application of 10% imidacloprid/50% permethrin to prevent Ehrlichia canis exposure in dogs under natural conditions

Otranto, Domenico, Paradies, Paola , Testini, Gabriella , Latrofa, Maria Stefania, Weigl, Stefania , Cantacessi, Cinzia, Mencke, Norbert , de Caprariis , Donato , Parisi, Antonio , Capelli, Gioia , and Stanneck, Dorothee (2008) Application of 10% imidacloprid/50% permethrin to prevent Ehrlichia canis exposure in dogs under natural conditions. Veterinary Parasitology, 153 (3-4). pp. 320-328.

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Canine monocytic ehrlichiosis (CME) caused by Ehrlichia canis is the most known canine tick-borne disease (TBD) spread throughout the world. Preventing tick bites is a priority to reduce the risk of TBDs and it was the aim of the present study to evaluate the efficacy of a combination of imidacloprid 10% and permethrin 50% (ImPer) (Advantix®; Bayer AG, Germany) in a spot-on formulation to control CME under field conditions. On January–March 2005, 845 dogs from two kennels in southern Italy (kennels of Bari (KB)- and Ginosa (KG)), with a history of tick infestation were initially tested by serology and PCR assay for E. canis infection. Data on Leishmania infantum infection were also available from a previous study carried out on the same dog population. One hundred twenty-six dogs (14.9%) presented anti-E. canis antibodies with a relative prevalence of 15.6% (n = 65 dogs in KB) and 14.2% (n = 61 dogs in KG). Five hundred thirty-five animals found negative both for E. canis and L. infantum infections were enrolled in three groups (Group A—treated with ImPer once a month; Group B—treated every 2 weeks; and Group C—untreated control animals) and monitored for E. canis infection by serology and PCR in November 2005 (first follow-up) and in March 2006 (second follow-up). The E. canis infection was serologically revealed, at the first and/or second follow-up, in 26 animals from Group C in KB and KG (mean incidence density rate (IDR), 13.24%) while in none of the animals from Group A (KB and KG) and only in one animal from Group B (IDR 1.13%) in KG. The final protection efficacy of ImPer ranged from 95.57% to 100% in Groups B and A. At PCR only 15 dogs from KG were positive for Rickettsiales only at the first follow-up and at the sequence analysis two (both in Group C) revealed 100% homology with E. canis sequences while 13 with Anaplasma platys. Four out of 13 A. platys PCR-positive dogs were also seropositive for E. canis at one or both follow-ups. ImPer, by virtue of its repellent and acaricidal activity against ticks, has been shown to be efficacious to prevent E. canis infection in treated dogs living under natural conditions in endemic areas.

Item ID: 26537
Item Type: Article (Research - C1)
ISSN: 1873-2550
Keywords: canine-vector borne diseases; pharmacological control; prophylaxis; field-trial
Date Deposited: 04 Jun 2013 04:53
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070708 Veterinary Parasitology @ 80%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070710 Veterinary Pharmacology @ 20%
SEO Codes: 86 MANUFACTURING > 8609 Veterinary Pharmaceutical Products > 860999 Veterinary Pharmaceutical Products not elsewhere classified @ 70%
97 EXPANDING KNOWLEDGE > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences @ 30%
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