Parasites, Hosts and Diseases

"Ah-Jin Ahn"

Original Articles

Extermination Speed of an Imidacloprid and Flumethrin Polymer Matrix Collar against Larvae, Nymphs and Adults of Haemaphysalis longicornis: Kyu-Sung Ahn, Ah-Jin Ahn, Ha-Jung Kim, Chang-Min Lee, Guk-Hyun Suh, Eun Jeong Won, SungShik Shin; Korean J Parasitol 2021;59(5):481-487.
Published online October 22, 2021; DOI: https://doi.org/10.3347/kjp.2021.59.5.481

Abstract
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The
objective
of this study was to evaluate the efficacy of an imidacloprid 10% and flumethrin 4.5% polymer matrix collar against the developmental stages of Haemaphysalis longicornis infesting dogs using the hair from treated dogs in a semi-in-vitro assay set. When incubated with 0.5 g of the hair collected from the dogs installed with the drug-embedded collar after 10 days, average death rate of the larval, nymphal, and adult H. longicornis was 21.5%, 77.9%, and 100% at 30 min, 1 hr, and 2 hr, respectively. This study showed the larval stages as well as the nymphal and adult stages of H. longicornis ticks are killed upon contact with the hair from dogs treated with the collar within 2 hr.

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Excretion of Toxoplasma gondii oocysts from Feral Cats in Korea: Kyu-Sung Ahn, Ah-Jin Ahn, Sang-ik Park, Woon-Mok Sohn, Jae-han Shim, Sung-Shik Shin; Korean J Parasitol 2019;57(6):665-670.
Published online December 31, 2019; DOI: https://doi.org/10.3347/kjp.2019.57.6.665

Abstract
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Sporulated oocysts from the feces of infected cats with Toxoplasma gondii can cause detrimental disease in both humans and animals. To investigate the prevalence of feral cats that excrete T. gondii oocysts in the feces, we examined fecal samples of 563 feral cats over a 3-year period from 2009 to 2011. Oocysts of T. gondii excreted into the feces were found from 4 of 128 cats in 2009 (3.1%) and one of 228 (0.4%) in 2010 while none of the 207 cats in 2010 were found positive with oocysts in their feces, resulting in an overall prevalence rate of 0.89% (5/563) between 2009 and 2011. Among the 5 cats that tested positive with T. gondii oocysts, 4 of the cats were male and 1 was a female with an average body weight of 0.87 kg. Numerous tissue cysts of 60 ?m in diameter with thin (<0.5 ?m) cyst walls were found in the brain of one of the 5 cats on necropsy 2 months after the identification of oocysts in the feces. A PCR amplification of the T. gondii-like oocysts in the feces of the positive cats using the primer pairs Tox-5/Tox-8 and Hham34F/Hham3R confirmed the presence of T. gondii oocysts in the feces. This study provides a good indication of the risk assessment of feral cats in the transmission of T. gondii to humans in Korea.

Citations

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Toxoplasmosis, Prevalence of Toxoplasma gondii Parasitic in Domestic Cats in Al-Marj City - Libya
Faisal Fathalla Mohammed , Munthir Salah Alasbali
مجلة العلوم والدراسات الإنسانية - كلية الآداب والعلوم – المرج .2024; (77): 1. CrossRef
The detection and phylogenetic characterization of Cryptosporidium, Cystoisospora, and Giardia duodenalis of cats in South Korea
Chi Sun Yun, Bo-Youn Moon, Kichan Lee, Su Min Kang, Bok-Kyung Ku, Mi-Hye Hwang
Frontiers in Cellular and Infection Microbiology.2023;[Epub] CrossRef
Prevalence of Toxoplasma gondii Measured by Western Blot, ELISA and DNA Analysis, by PCR, in Cats of Western Mexico
María de la Luz Galván-Ramírez, Claudia Charles-Niño, César Pedroza-Roldán, Carolina Salazar-Reveles, Karen Lissete Ocampo-Figueroa, Laura Roció Rodríguez-Pérez, Varinia Margarita Paez-Magallán
Pathogens.2022; 11(1): 109. CrossRef
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R.L. Freitas, A. Consalter, A.F.S. Spyrides, P.B.A. Dória, G.L. Albuquerque, S.F. Bruno, C.G. Barbosa, A.M.R. Ferreira
Arquivo Brasileiro de Medicina Veterinária e Zootecnia.2022; 74(2): 319. CrossRef
Prevalence of Zoonotic Pathogens in Domestic and Feral Cats in Shanghai, with Special Reference to Salmonella
Halim A, Bhekharee AK, Feng M, Cheng X, Halim M
Journal of Health Care and Research.2021; 2(1): 1. CrossRef
All about toxoplasmosis in cats: the last decade
J.P. Dubey, C.K. Cerqueira-Cézar, F.H.A. Murata, O.C.H. Kwok, Y.R. Yang, C. Su
Veterinary Parasitology.2020; 283: 109145. CrossRef
Molecular Detection of Toxoplasma Gondii in Haemaphysalis Ticks in Korea
Ju Yeong Kim, You Shine Kwak, In-Yong Lee, Tai-Soon Yong
The Korean Journal of Parasitology.2020; 58(3): 327. CrossRef
Seroprevalence and B1 gene Phylogeny of Toxoplasma gondii of Dogs and Cats in Republic of Korea
Yeojin Park, Jinhyeong Noh, Hyun-Ji Seo, Keun-Ho Kim, Subin Min, Mi-Sun Yoo, Bo-Ram Yun, Jong-Ho Kim, Eun-Jin Choi, Doo-Sung Cheon, Sung-Jong Hong, Soon-Seek Yoon, Yun Sang Cho
The Korean Journal of Parasitology.2020; 58(3): 257. CrossRef
Genetic Analysis of Zoonotic Gastrointestinal Protozoa and Microsporidia in Shelter Cats in South Korea
Dongmi Kwak, Min-Goo Seo
Pathogens.2020; 9(11): 894. CrossRef

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Identification and Prevalence of Globocephalus samoensis (Nematoda: Ancylostomatidae) among Wild Boars (Sus scrofa coreanus) from Southwestern Regions of Korea: Kyu-Sung Ahn, Ah-Jin Ahn, Tae-Hoon Kim, Guk-Hyun Suh, Kyoung-Woong Joo, Sung-Shik Shin; Korean J Parasitol 2015;53(5):611-618.
Published online October 29, 2015; DOI: https://doi.org/10.3347/kjp.2015.53.5.611

Abstract
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This study describes the first record of Globocephalus samoensis (Nematoda: Ancylostomatidae) recovered in wild boars from southwestern regions of Korea. Gastrointestinal tracts of 111 Korean wild boars (Sus scrofa coreanus) hunted from mountains in Suncheon-si, Gwangyang-si, and Boseong-gun between 2009 and 2012 were examined for their visceral helminths. G. samoensis, as identified by morphological characteristics of the head and tail, were recovered from the small intestine of 51 (45.9%) wild boars. Worms were found from 7 of 28 wild boars (25.0%) from Suncheon-si, 40 of 79 (50.6%) from Gwangyang-si, and all 4 (100%) from Boseong-gun. The length of adult females was 7.2±0.5 mm, and the thickest part of the body measured the average 0.47±0.03 mm, while those of males were 6.52±0.19 and 0.37±0.02 mm, respectively. The buccal cavity was equipped with a pair of large and bicuspid subventral lancets near the base of the capsule. The average length of spicules of males was 0.45±0.02 mm. By the present study, G. samoensis is recorded for the first time in southwestern regions of Korea. Additionally, morphological characteristics and identification keys provided in the present study will be helpful in the faunistic and taxonomic studies for strongylid nematodes in both domestic and wild pigs. The infection of G. samoensis apparently did not elicit pathologic lesions, as revealed by macroscopic observation during the autopsy of all wild boars in this study.

Citations

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Survey the Occurrence of Globocephalus urosubulatus (Nematoda: Ancylostomatidae) in Wild Boars (Sus scrofa) in the State of São Paulo, Brazil
Michel dos Santos Pinto, João Alfredo Biagi Camargo Neto, Maria Julia Hernandes de Freitas, Bárbara Fuzetto Florentino, Natália de Souza Sapatera, Fernando Paiva, Alex Akira Nakamura, Daniela Bernadete Rozza, Simone Baldini Lucheis, Katia Denise Saraiva B
Veterinary Sciences.2024; 11(8): 370. CrossRef
Globocephalus urosubulatus (Alessandrini, 1909) (Nematoda: Ancylostomatidae) in Brazil: a morphological revisitation
Raul Henrique da Silva Pinheiro, Sérgio Melo, Raimundo Nonato Moraes Benigno, Elane Guerreiro Giese
Revista Brasileira de Parasitologia Veterinária.2021;[Epub] CrossRef
SURVEY OF GASTROINTESTINAL HELMINTHS OF FERAL HOGS FROM TEXAS
Kalin M. Skinner, Megan R. Wise De Valdez
The Southwestern Naturalist.2019; 63(2): 91. CrossRef
Gastrointestinal helminths from the common warthog,Phacochoerus africanus(Gmelin) (Suidae), in KwaZulu-Natal Province, South Africa, with comments on helminths of Suidae and Tayassuidae worldwide
Kerstin Junker, Andrea Spickett, Monlee Swanepoel, Boris R. Krasnov, Joop Boomker, Louwrens C. Hoffman
Parasitology.2019; 146(12): 1541. CrossRef
The diversity and impact of hookworm infections in wildlife
Mauricio Seguel, Nicole Gottdenker
International Journal for Parasitology: Parasites and Wildlife.2017; 6(3): 177. CrossRef

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Molecular Prevalence of Acarapis Mite Infestations in Honey Bees in Korea: Ah-Jin Ahn, Kyu-Sung Ahn, Jin-Hyeong Noh, Young-Ha Kim, Mi-Sun Yoo, Seung-Won Kang, Do-Hyeon Yu, Sung Shik Shin; Korean J Parasitol 2015;53(3):315-320.
Published online June 30, 2015; DOI: https://doi.org/10.3347/kjp.2015.53.3.315

Abstract
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Acarapis mites, including Acarapis woodi, Acarapis externus, and Acarapis dorsalis, are parasites of bees which can cause severe damage to the bee industry by destroying colonies and decreasing honey production. All 3 species are prevalent throughout many countries including UK, USA, Iran, Turkey, China, and Japan. Based on previous reports of Acarapis mites occurring in northeast Asia, including China and Japan, we investigated a survey of Acarapis mite infestations in honey bees in Korean apiaries. A total of 99 colonies of Apis mellifera were sampled from 5 provinces. The head and thorax of 20 bees from each colony were removed for DNA extraction. PCR assays were performed with 3 primer sets, including T, A, and K primers. Results indicated that 42.4% (42/99) of samples were Acarapis-positive by PCR assay which were sequenced to identify species. Each sequence showed 92.6-99.3% homology with reference sequences. Based on the homology, the number of colonies infected with A. dorsalis was 32 which showed the highest infection rate among the 3 species, while the number of colonies infected with A. externus and A. woodi was 9 and 1, respectively. However, none of the Acarapis mites were morphologically detected. This result could be explained that all apiaries in the survey used acaricides against bee mites such as Varroa destructor and Tropilaelaps clareae which also affect against Acarapis mites. Based on this study, it is highly probable that Acarapis mites as well as Varroa and Tropilaelaps could be prevalent in Korean apiaries.

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Molecular Identification and Prevalence of the Mite Carpoglyphus lactis (Acarina: Carpoglyphidae) in Apis mellifera in the Republic of Korea
Thi-Thu Nguyen, Mi-Sun Yoo, Hyang-Sim Lee, So-Youn Youn, Se-Ji Lee, Su-Kyoung Seo, Jaemyung Kim, Yun-Sang Cho
Insects.2024; 15(4): 271. CrossRef
PCR-based detection of the honeybee tracheal mite (Acarapis woodi) in Türkiye
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Veterinary Sciences.2022; 9(5): 221. CrossRef
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A.R. Salau, O.N. Adekunle, O.A. Lawal
African Entomology.2020; 28(1): 19. CrossRef
Honey as a Source of Environmental DNA for the Detection and Monitoring of Honey Bee Pathogens and Parasites
Anisa Ribani, Valerio Joe Utzeri, Valeria Taurisano, Luca Fontanesi
Veterinary Sciences.2020; 7(3): 113. CrossRef
Characterisation of the British honey bee metagenome
Tim Regan, Mark W. Barnett, Dominik R. Laetsch, Stephen J. Bush, David Wragg, Giles E. Budge, Fiona Highet, Benjamin Dainat, Joachim R. de Miranda, Mick Watson, Mark Blaxter, Tom C. Freeman
Nature Communications.2018;[Epub] CrossRef

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First Record of Bourgelatia diducta (Nematoda: Chabertiidae) from Wild Boars in the Republic of Korea: Kyu-Sung Ahn, Dae-Sung Oh, Ah-Jin Ahn, Guk-Hyun Suh, Sung-Shik Shin; Korean J Parasitol 2013;51(4):441-448.
Published online August 30, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.4.441

Abstract
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This study describes the first record of Bourgelatia diducta (Nematoda: Chabertiidae) from wild boars in the Republic of Korea (=South Korea). Gastrointestinal tracts of 87 Korean wild boars (Sus scrofa coreanus) hunted in mountains in the south-western part of South Korea between 2009 and 2012 were examined for their visceral helminths. B. diducta, as identified by morphological characteristics of the head and tail, were recovered from the large intestine of 47 (54%) wild boars. The average length of adult female worms was 11.3±0.87 mm and the thickest part of the body measured 0.54±0.04 mm in maximum width, while those of males were 9.8±0.72 and 0.45±0.03 mm, respectively. The characteristic J-shaped type II ovejector was observed in females, and the type II dorsal ray with 2 rami on each side of the median fissure was uniquely seen in males. The buccal capsule was small, relatively thin-walled, cylindrical, very short, and ring-shaped. The externodorsal ray arose from a common stem with the dorsal ray. The cervical groove was absent. The anterior extremity was equipped with 20-22 external corona radiata, 4 cephalic papillae and 2 lateral amphids around the mouth. The eggs were 66.0×38.9 ?m in average size. By the present study, B. diducta (Nematoda: Chabertiidae) is recorded for the first time in South Korea. Additionally, morphological characteristics and identification keys provided in the present study will be helpful in the faunistic or taxonomic studies for strongylid nematodes related.

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Identification and Prevalence of Globocephalus samoensis (Nematoda: Ancylostomatidae) among Wild Boars (Sus scrofa coreanus) from Southwestern Regions of Korea
Kyu-Sung Ahn, Ah-Jin Ahn, Tae-Hoon Kim, Guk-Hyun Suh, Kyoung-Woong Joo, Sung-Shik Shin
The Korean Journal of Parasitology.2015; 53(5): 611. CrossRef

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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

Citations to this article as recorded by

Transcriptome Analysis of Otodectes cynotis in Different Developmental Stages
Ran He, Qian Zhang, Xiaobin Gu, Yue Xie, Jing Xu, Xuerong Peng, Guangyou Yang
Frontiers in Microbiology.2022;[Epub] CrossRef
The Construction of Full-Length cDNA Library for Otodectes cynotis
Li Hu, Ya-e Zhao, Dong-ling Niu, Rui Yang, Ji-hui Zeng
Acta Parasitologica.2019; 64(2): 251. CrossRef
Evidence‐based veterinary dermatology: a review of published studies of treatments forOtodectes cynotis(ear mite) infestation in cats
Ching Yang, Hui‐Pi Huang
Veterinary Dermatology.2016; 27(4): 221. CrossRef