Abstract
Two separated field studies were carried out in Hungary to assess Otodectes cynotis infestation and to evaluate the efficacy of 10% imidacloprid and 1.0% moxidectin spot-on for cats against ear mites in a cat shelter. Mite infestation was studied with direct, otoscopic examination of the external ear canals and with the presence or absence of live mites in samples taken with cotton-tipped swabs from both ears of each animal. Fifteen out of 100 cats selected randomly were found to be infested. Seven animals showed severe clinical signs of otitis externa consistent with O. cynotis infestation. These cats were restless, shaking their heads and scratching their ears. Alopecia, wounds caused by self-injuries and dermatitis were seen in and around the ears of the two cats having most severe clinical signs. The other infested cats did not show any clinical signs, only dark brown exudates ranging frommoist and waxy to crumbly and flaky accumulated at the deeper part of the external ear canals.
Ten cats were randomly assigned to the treatment group and five animals to the untreated control group. Each cat of the treated group was weighed and treated with the recommended dosage of 10% imidacloprid and 1.0%moxidectin spot-on on day 0. Only those three cats were found to be infested with live ear mites on day 9, which had showed the most severe clinical signs of otitis externa before treatment. The black-brown cerumen or scab was drier in their ear canals than nine days earlier. Some live and dead mites were found only by microscopic examination of aural debris. The efficacy of 10% imidacloprid and 1.0%moxidectin against O. cynotis was 100% on days 16 and 30. Direct and otoscopic examinations of both ears of treated animals could not reveal mite movement. A very small amount of dry material was found in the ear canals of the formerlymost affected cats. No or some dried up mites occurred in samples taken with cotton-tipped swabs from all cats which had no clinical signs of otoacariosis. The external ear canals of untreated cats continued to contain large amounts of dark brown, waxy cerumen and their ear swab samples contained live ear mites until the end of study.
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References
Akucewich LH, Philman K, Clark A, Gillespie J, Kunkle G, Nicklin CF, Greiner EC (2002). Prevalence of ectoparasites in a population of feral cats from North Central Florida during the summer. Vet Parasitol 109:129–139.
Arther RG, Atkins C, Ciszewski DK, Davis WL, Ensley SM, Settje TL (2005). Safety of imidacloprid plus moxidectin topical solution applied to cats heavily infected with adult heartworms (Dirofilaria immitis). Parasit Res 97 [Suppl 1]:S70–S75.
Beresford-Jones WP (1955). Observations on the incidence of Otodectes cynotis (Hering) on dogs and cats in the London area. Vet Rec 67:716–720.
Blot C, Kodjo A, Reynaud MC, Bourdoiseau G (2003). Efficacy of selamectin administered topically in the treatment of feline otoacariosis. Vet Parasitol 112:241–247.
Curtis CF (1995). Treatment and control of problems associated with parasitic skin surface residents. In: Proceedings of the Royal Veterinary College Dermatology Seminar – Ectoparasites and their control, November 1995.
Curtis CF (2004). Current trends in the treatment of Sarcoptes, Cheyletiella and Otodectes mite infestations in dogs and cats. Vet Dermatol 15:108–114.
European Medicines Agency. Veterinary Medicines and Inspections. EMEA/CVMP/297/03.
Fourie LJ, Kok DJ, Heine J (2003). Evaluation of the efficacy of an imidacloprid 10% / moxidectin 1% spot-on against Otodectes cynotis in cats. Parasitol Res 90 [Suppl 3]:S112–S113.
Gram D, Payton AJ, Gerig TM, Bevier DE (1994). Treating ear mites in cats: A comparison of subcutaneous and topical ivermectin. Vet Med 89:1122–1125.
Griffin CE (1981). Otitis externa. Compend Contin Educ Pract Vet 3:741–750.
Jeneskog T, Falk K (1990). The effect of local ivermectin treatment on ear mite infestation in a cat breeding colony. Scand J Lab Anim Sci 17:17–22.
Kraft W, Kraiss-Gothe A, Gothe R (1988). The Otodectes cynotis infestation of dogs and cats: biology of the agent, epidemiology, pathogenesis, diagnosis and case description of generalized mange in dogs. Tierärztliche Praxis 16:409–415 (in German).
Lane JG (1994). The Ear. In: Chandler EA, Gaskell CJ, GaskellRM(eds) FelineMedicine and Therapeutics. 2nd Edition Blackwell Science, Oxford, UK.
Little C (1996). A clinician’s approach to the investigation of otitis externa. Practice 18:9–16.
Lopez, RA (1993). Of mites and men. JAVMA 203:606–607. McCallum PP (1967). Inapparent infestation of Otodectes cynotis in the dog and cat. Georgia Vet J 19:8–9.
Merchant SR (1993). The skin: parasitic diseases. In: Norsworthy, GD (ed), Feline Practice. J.B. Lippincott Co. Philadelphia, PA, pp. 511–517.
Murphy ED, Greiner EC, McDuffie RC (1982). Otodectes cynotis in dogs and cats from Ft. Myers, Florida. Vet J 11:15–18.
Reinemeyer CR, Charles S (2003). Evaluation of the efficacy of a combination of imidacloprid + moxidectin against immature Toxocara cati in cats. Parasitol Res 90 [Suppl 3]:S140–S141.
RoseWR(1976). Otitis externa: Otoacariasis. VetMed Small Animal Clinic 71:1280–1283.
Roth L (1988). Pathologic changes in otitis externa. Vet Clin N Am – Small 18:755–756.
SaridomichelakisMN, Koutinas AF, Gioulekas D, Leontides L, Polizopoulou Z (1999). Sensitisation to dust mites in cats with Otodectes cynotis infestation. Vet Dermatol 10:89–94.
Schneck G (1988) Use of ivermectin against earmites in cats. Vet Rec 123:599.
Scott WD (1980). Feline Dermatology 1900–1978: a monograph. J Am Anim Hosp Assoc 16:428–431.
Scott DW, Miller WH, Griffin CE (1995). Parasitic skin diseases. In: Muller and Kirk’s Small Animal Dermatology, 5th Edition. Saunders, Philadelphia, PA, pp. 392–468.
Scott DW, Miller WH, Griffin CE (2001). Skin immune system and allergic skin diseases. In: Muller and Kirk’s Small Animal Dermatology. 6th Edition. Saunders, Philadelphia, PA, pp. 632–635.
Shanks DJ, McTier TL, Rowan TG, Watson P, Thomas CA, Bowmann DD, Hair JA, Pengo G, Genchi C, Smothers CD, Smith DG, Jernigan AD (2000). The efficacy of selamectin in the treatment of naturally acquired aural infestations of Otodectes cynotis on dogs and cats. Vet Parasitol 91:283–290.
Six RH, Clemence RG, Thomas CA, Behan S, Boy MG, Watson P, Benchaoui HA, Clements PJM, Rowan TG, Jernigan AD (2000). Efficacy and safety of selamectin against Sarcoptes scabiei on dogs and Otodectes cynotis on dogs and cats. Vet Parasitol 91:291–309.
Sotiraki ST, Koutinas AF, Leontides LS, Adamama-Moraitou KK, Himonas CA (2001). Factors affecting the frequency of ear canal and face infestation by Otodectes cynotis in the cat. Vet Parasitol 96:309–315.
The Technical Manual Advocate® (2005). Bayer HealthCare AG, Animal Health, Germany, Version 3.0
Weisbroth SH, Powell MB, Roth L, Scher S (1974). Immunopathology of naturally occurring otodectic otoacariasis in the domestic cat. JAVMA 165:1088–1974.
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Farkas, R., Germann, T. & Szeidemann, Z. Assessment of the Ear Mite (Otodectes cynotis) Infestation and the Efficacy of an Imidacloprid plus Moxidectin Combination in the Treatment of Otoacariosis in a Hungarian Cat Shelter. Parasitol Res 101 (Suppl 1), 35–44 (2007). https://doi.org/10.1007/s00436-007-0609-5
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DOI: https://doi.org/10.1007/s00436-007-0609-5