Association between infestation by Lynxacarus radovskyi (Acari: Lystrophoridae) and the occurrence of Feline Eosinophilic Granuloma Complex

Abstract

Lynxacarus radovskyi are mites commonly found within domestic feline hair stems. The infested animal presents an opaque fur with a ''salt and pepper'' aspect. The contamination may occur by direct contact with other infected animals or by fomites, and the main diagnostic tool is the direct examination of the fur. The Feline Eosinophilic Granuloma Complex (FEGC) is a dermatological pattern of an immune answer against many types of injuries in felines, mainly during allergic reactions, and the treatment of choice are corticosteroids. The objective of this work was to document the linxcariosis cases at the Veterinary Hospital Professor Ricardo Alexandre Hippler-University of Vila Velha. Futhermore, the work also meant to research the association between the parasite contagion and the occurrence of FEGC injuries, which commonly occurred. Between April 2017 and August 2018, there were 8 reported cases of felines infested with L. radovskyi. The diagnoses were made with Acetate tape impression or by direct fur examination. Seven out of the eight cats presented with at least one characteristic injury of the FEGC. In all of them the chosen treatment was moxidectin or spot-on imidacloprid plus corticotherapy on the cats with FEGC, which were effective.

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“…Gejala klinis yang paling sering ditemukan pada kucing yang positif terinfestasi tungau L. radovskyi yaitu rambut kucing terlihat kusam, rontok dan tampak butiran putih tersebar di batang rambut yang menyerupai ketombe, pada intensitas yang parah ditemukan gejala berupa alopecia dan pruritus. Referensi menyatakan hal yang sama bahwa kucing yang terinfestasi L. radovskyi biasanya tampak kotor, sehingga rambut terlihat kusam, mudah rontok, alopecia dan pruritus (Rocha et al, 2019).…”

Effectiveness of transdermal fluralaner in the treatment of Lynxacarus radovskyi (Acari: Listrophoridae) in naturally infested domestic cats

“…These mites, which are parasites that infest the fur of domestic and wild felids, occur mostly in tropical and humid climates. The mite's life cycle begins on the host, through direct contact or via fomites (Rocha et al, 2019).…”

Efficacy of oral sarolaner againstLynxacarus radovskyiin naturally infested cats

“…In particular, pruritus may not be proportional to the infestation severity, because cats with few mites can still develop intense pruritus. 4,5 Some clinical signs, such as vomiting and constipation, can be present due to excessive grooming, with consequent increase of fur ingestion and trichobezoar formation. 1,6 Topical therapies that previously have been shown to be effective include 1% selenium sulfide, sulfurous or tetramethylthiuram sulfide soap, 6,7 application of a D-phenothrin (pyrethroid) spray formulation (100-200 mg/kg) 8 and application of a fipronil (phenylpyrazole) spray formulation (7.5-15 mg/kg).…”