Parasites, Hosts and Diseases

"Otodectes cynotis"

Case Report

First Feline Case of Otodectosis in the Republic of Korea and Successful Treatment with Imidacloprid/Moxidectin Topical Solution: Ah-Jin Ahn, Dae-Sung Oh, Kyu-Sung Ahn, Sung-Shik Shin; Korean J Parasitol 2013;51(1):125-128.
Published online February 18, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.1.125

Abstract
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In April 2010, pruritic symptoms were recognized in 3 privately-owned Siamese cats raised in Gwangju, Korea. Examination of ear canals revealed dark brown, ceruminous otic exudates that contain numerous live mites at various developmental stages. Based on morphological characteristics of adult mites in which caruncles were present on legs 1 and 2 in adult females and on legs 1, 2, 3, and 4 in adult males while the tarsus of leg 3 in both sexes was equipped with 2 long setae, the mite was identified as Otodectes cynotis. Ten ear mite-free domestic shorthaired cats were experimentally infected with O. cynotis to evaluate the efficacy of 10% imidacloprid/1% moxidectin spot-on. Live mites were recovered from 1 of 10 treated cats on day 9 post-treatment (PT) while no live mites were observed from the ear canals of treated cats on days 16 and 30 PT. The efficacy of 10% imidacloprid/1% moxidectin spot-on on O. cynotis in cats was, therefore, 90% on day 9 and 100% on days 16 and 30 PT. This is the first report of otodectosis in 3 cats naturally infested with O. cynotis in Gwang-ju, Korea. Both natural and experimental infestations were successfully treated with 10% imidacloprid/1% moxidectin spot-on.

Citations

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International Journal of Medical Parasitology and Epidemiology Sciences.2025; 6(4): 135. CrossRef
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Ran He, Qian Zhang, Xiaobin Gu, Yue Xie, Jing Xu, Xuerong Peng, Guangyou Yang
Frontiers in Microbiology.2022;[Epub] CrossRef
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Original Article

A Survey of Ectoparasite Infestations in Stray Dogs of Gwang-ju City, Republic of Korea: Jeong-Hyun Chee, Jung-Kee Kwon, Ho-Seong Cho, Kyoung-Oh Cho, Yu-Jin Lee, A. M. Abd El-Aty, Sung-Shik Shin; Korean J Parasitol 2008;46(1):23-27.
Published online March 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.1.23

Abstract
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This study was designed to investigate the incidence of ectoparasite infestation among stray dogs in Gwang-ju City, Republic of Korea. A total of 103 stray dogs collected in the Animal Shelter of Gwang-ju City from November 2003 to August 2005 were investigated in this study. Ectoparasites of one or more genera were detected in 45.6% (47 / 103) of the dogs examined for dermatologic lesions and/or skin scrapings (from 3-5 affected areas). Otodectes cynotis was found to be the most frequent parasite (22.%, 23 / 103), followed by Sarcoptes scabiei var canis (19.4%, 20 / 103), Ctenocephalides canis (6.8%, 7 / 103), Demodex canis (4.9%, 5 / 103), and Trichodectes canis (1.0%, 1 / 103). Monospecific infestation was found in 83.0% (39 / 47) of the affected dogs, whereas concurrent infestations with 2 or more ectoparasites per animal were found in 17.0% (8 / 47) of the affected dogs. Trichodectes canis is reported for the first time in the Republic of Korea. Dogs less than 1 yr old were more heavily infected than other age groups (66.7%), and small-sized dogs of less than 3 kg body weight were more heavily infected than larger dogs (41.7%).

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