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

  • Camilla Matias da Rocha
  • Priscila Camargo Granadeiro Farias
  • Leonardo Gorza
  • Filippe Elias de Freitas SoaresEmail author
  • Carolina Magri Ferraz
  • Ricardo Leandro Oliveira Souza
  • Lucas Brazolino Siepierski Renon
  • Fabio Ribeiro Braga
Short Communication


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.


Ectoparasite Mite Cat Moxidectin Imidacloprid FEGC 



FAPES, CAPES and CNPq are gratefully acknowledged for their financial contributions.

Author contributions

CMR, PCGF, LLG, and LBSR designed the study protocol. CMR, FEFS, RLOS, and FRB collected data and were involved in the analysis and interpretation of all data. CMR, CMF, PCGF, FEFS, and FRB contributed to drafting the manuscript and/or critically revising the paper and intellectual content. All authors read and approved the final manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


  1. Aguiar J, Machado MLS, Rodrigues RF, Stieven PH, Cunha AM, Zazycky RR (2009) Infestação mista por Lynxacarus radovskyi e Felicola subrostratus em um gato na região de Porto Alegre, RS, Brasil. Acta Sci Vet 37:301–305CrossRefGoogle Scholar
  2. Clare F, Mello RMIC, Bastos TV, Lessa C, Conceição LG (2004) Use of fipronil for treatment of Lynxacarus radovskyi in outdoor cats in Rio de Janeiro (Brazil). Vet Dermatol 15:50CrossRefGoogle Scholar
  3. Colombini S, Hodgin EC, Foil CS, Hosgood G, Foil LD (2001) Induction of feline flea allergy dermatitis and the incidence and histopathological characteristics of concurrent indolent lip ulcers. Vet dermatol 12(3):155–161CrossRefGoogle Scholar
  4. Craig TM, Tell PD, Dubuisson LM, Dubuisson RK (1993) Lynxacarus radovskyi infestation in a cat. J Am Vet Med Assoc 202:613–614Google Scholar
  5. Faustino MAG, Messias JB, Romeiro ET (2004) Infestação por Lynxacarus radovskyi (Tenorio, 1974) em felinos - revisão. Rev Clin Vet 33:52–55Google Scholar
  6. Fondati A, Fondevila D, Ferrer L (2001) Histopathological study of feline eosinophilic dermatoses. Barcelona. Vet Dermatol 12:333–338CrossRefGoogle Scholar
  7. Han HS, Noli C, Cena T (2016) Efficacy and duration of action of oral fluralaner and spot-on moxidectin/imidacloprid in cats infested with Lynxacarus radovskyi. Vet Dermatol 27:474-e127CrossRefGoogle Scholar
  8. Heath ACG, Mariadas BAA (1999) New Zealand record for the cat fur-mite Lynxacarus (Felistrophorus) radovskyi Tenorio (Acarina: Astigmata: Listrophoridae). N Z Vet J 47:211–212CrossRefGoogle Scholar
  9. Ketzis JK, Dundas J, Shell LG (2016) Lynxacarus radovskyi mites in feral cats: a study of diagnostic methods, preferential body locations, co-infestations and prevalence. Vet Dermatol 27(5):425-e108CrossRefGoogle Scholar
  10. Larsson CE, Lucas R (2016) Tratado de medicina externa. Dermatologia veterinária, 1st edn. Interbook, São Caetano do SulGoogle Scholar
  11. Maruyama S, Brandão PE, de Castro AMMG, Michalany NS, Fyfe J, Malik R, Larsson CE (2015) Molecular diagnosis of Canine Leproid Granuloma out of paraffin-embedded histological cuts using polymerase chain reaction (PCR)—a retrospective study (2002–2009). Semin Ciê Agrár 36(5):3129–3138CrossRefGoogle Scholar
  12. Miller W, Griffin C, Campbell K (2016) Parasitic skin disease. In: Miller W, Griffin C, Campbell K (eds) Muller and kirk’s small animal dermatology, 7ª edn. Elsevier, St. Louis, pp 284–320Google Scholar
  13. Mazzoti GA, Roza MR (2016) Medicina felina essencial - guia prático, 1st edn. Equalis, CuritibaGoogle Scholar
  14. Medleau L, Hnilica KA (2003) Dermatologia de Pequenos Animais - Atlas Colorido e Guia Terapêutico. Roca, São Paulo, pp 106–108Google Scholar
  15. Payne PA, Dryden MW, Carter GR (2005) External parasitic diseases of dogs and cats. In: Carter GR, Payne PA (eds) A concise guide to infectious and parasitic diseases of dogs and cats. International Veterinary Information Service, New YorkGoogle Scholar
  16. Pereira MCP (1996) The cat fur mite (Lynxacarus radovskyi) in Brazil. Feline Pract 24:24–26Google Scholar
  17. Rhodes KH (2005) Dermatologia de Pequenos Animais Consulta em 5 Minutos. Revinter, Rio de JaneiroGoogle Scholar
  18. Rocha GS, Ahid SMM, Bezerra ACDS, Figueira KD, Santos JPS (2008) Frequência de ácaros em cães e gatos no município de Mossoró, Rio Grande do Norte. Acta Sci Vet 36:263–266CrossRefGoogle Scholar
  19. Romeiro ET, Faustino MAG, Alves LC, Soares YMV, Matoso UNV (2007) Aspectos clínicos da infestação por Lynxacarus radovskyi em gatos procedentes da Região Metropolitana do Recife. Rev Clin Vet 69:108–113Google Scholar
  20. Saridomichelakis MN (2008) Skin citology and examinations for ectoparasites. In: Proceedings 6th world congress of veterinary dermatology, Hong Kong, pp 14–21Google Scholar
  21. Serra-Freire NM, Benigno RNM, Oliveira SS, Lopes LMS, Galvão G (2002) Lynxacarus radovskyi - diagnostico e tratamento em felinos de Belém - Pará. Rev Univ Rural 22:57–60Google Scholar
  22. Tenório JM (1974) A new species of Lynxacarus (Acarina: Astigmata: Listrophoridae) from Felis catus in the Hawaiian Islands. J Med Entomol 11:599–604CrossRefGoogle Scholar

Copyright information

© Indian Society for Parasitology 2019

Authors and Affiliations

  • Camilla Matias da Rocha
    • 1
  • Priscila Camargo Granadeiro Farias
    • 2
  • Leonardo Gorza
    • 2
  • Filippe Elias de Freitas Soares
    • 3
    Email author
  • Carolina Magri Ferraz
    • 2
  • Ricardo Leandro Oliveira Souza
    • 2
  • Lucas Brazolino Siepierski Renon
    • 2
  • Fabio Ribeiro Braga
    • 2
  1. 1.Setor de Clínica e Cirurgia Hospital Veterinário Ricardo Alexandre HipplerUniversidade Vila VelhaVila VelhaBrazil
  2. 2.Laboratório de ClinicoUniversidade Vila VelhaVila VelhaBrazil
  3. 3.Laboratório de Patologia dos Invertebrados, Instituto de Patologia Tropical e Saúde PúblicaUniversidade Federal de GoiásGoiâniaBrazil

Personalised recommendations