Parasites, Hosts and Diseases

"zoonoses"

Case Report

Thelazia callipaeda (Nematoda: Spirurida) infections in 2 wildlife species, Prionailurus bengalensis and Nyctereutes procyonoides, in Korea: Jinho Jang, Young-Seok Park, YoungMin Yun, Keeseon S. Eom, Seongjun Choe; Parasites Hosts Dis 2025;63(1):95-101.
Published online February 25, 2025; DOI: https://doi.org/10.3347/PHD.24079

Abstract
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Thelazia callipaeda (Spirurida, Thelaziidae), a parasitic eye worm causing thelaziasis has been reported in humans and dogs in Korea. However, its occurrence in other potential reservoir hosts, including wild animals, remains unclear. In the present study, we described the 2 cases of thelaziasis from both of feral and captive wild animal in Korea. In August and November 2017, 2 cases of the parasitic infections were found in the third eyelid of rescued leopard cat Prionailurus bengalensis and reared raccoon dog Nyctereutes procyonoides at the Chungnam Wild Animal Rescue Center. A total of 20 and 24 worms were detected from the left and right eyes of leopard cat, respectively. In the left eye of the raccoon dog, 5 worms were recognized. Male worms were 969–11,860 μm long (10,600 μm on average) and 300–320 μm width (315 μm on average). Female worms were 13,430–15,330 (14,480) μm long and 320–370 (344) μm wide in size. They commonly had a characteristic scalariform buccal cavity and short esophagus. The vulva openings were located at the anterior of esophago-intestinal junction in females. The thelaziasis is reported in 2 species of wildlife, P. bengalensis and N. procyonoides, for the first time in Korea.

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Detection of intestinal parasites in leopard cat fecal samples using shotgun metagenomics
Jun Ho Choi, Singeun Oh, Myung-hee Yi, Dongjun Kang, Du-Yeol Choi, Xavier Chavarria, Arwa Shatta, Yoon Hee Cho, Seongjun Choe, Seung-Hun Lee, Ju Yeong Kim
Parasites, Hosts and Diseases.2025; 63(4): 349. CrossRef

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Original Articles

Prevalence of Zoonotic Metacercariae in Two Species of Grouper, Epinephelus coioides and Epinephelus bleekeri, and Flathead Mullet, Mugil cephalus, in Vietnam: Dung The Vo, Darwin Murrell, Anders Dalsgaard, Glenn Bristow, Dung Huu Nguyen, Thanh Ngoc Bui, Dung Thi Vo; Korean J Parasitol 2008;46(2):77-82.
Published online June 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.2.77

Abstract
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Fishborne zoonotic metacercariae have not been reported from brackish water and marine fish from Vietnam waters although these parasites are common in the country's freshwater fish. Both wild-caught and cultured grouper (Epinephelus coioides and Epinephelus bleekeri), and mullet (Mugil cephalus) from brackish and marine waters located in Khanh Hoa province in central coastal Vietnam were examined, and found positive for zoonotic trematode metacercariae. From grouper, Heterophyopsis continua and Procerovum varium were recovered. The prevalence of H. continua ranged from 2.0 to 6.0% and that for P. varium ranged from 11.6 to 15.8%. Mullet were infected with Pygidiopsis summa and H. continua; both of these species are new records for Vietnam. The prevalence of P. summa in mullet was generally high, ranging from 17.6 to 75.5%, and was significantly higher than the prevalence of H. continua (2.5 to 32.4%). There were no significant differences in the prevalence of metacercariae between grouper from natural or cultured habitats, indicating that the highest risk of infection occurs in the wild-caught state prior to their placement in culture. Further, there was no difference in metacercarial prevalence between the 2 species of grouper. Infected wild-caught seed were only observed from January to October. Monthly variation in prevalence suggests seasonal variation in mullet infections occurs in this region with the highest transmission taking place from October to December. Basic investigations on the ecology and epidemiology of these intestinal flukes need to be carried out to determine their significance as a public health problem and the aspects of their biology that may be vulnerable to control interventions.

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Survey for zoonotic liver and intestinal trematode metacercariae in cultured and wild fish in An Giang Province, Vietnam: Nguyen Diem Thu, Anders Dalsgaard, Ly Thi Thanh Loan, K. Darwin Murrell; Korean J Parasitol 2007;45(1):45-54.
Published online March 20, 2007; DOI: https://doi.org/10.3347/kjp.2007.45.1.45

Abstract
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Although Vietnam has a high risk of fishborne zoonotic trematode (FZT) infections for humans, little information exists on the epidemiology of these infections in the country's fish. Because of the importance of cultured catfish and snakehead production in An Giang province, a major production area in the Mekong Delta of Vietnam, a survey for FZTs was carried out in randomly selected fish farms between June 2005 and March 2006. For comparison, wild fish from the same area were also surveyed. A total of 852 cultured fish from 4 districts were collected and examined by pepsin digestion to determine their FZT infection status. In Tra catfish, the prevalence of all types of metacercariae was 2.6%, of which the prevalence of Haplorchis pumilio was 0.7%. The overall prevalence of metacercariae in wild fish was 30.6%, of which 10.3% harbored zoonotic species: H. pumilio (2.8%) and Procerovum sp. (5.6%). The prevalence of Opisthorchis metacercariae, which were diagnosed as O. viverrini, was 1.9%. No metacercariae were found in cultured snakehead fish, although wild-caught snakehead fish had a FZT prevalence of 10.3%: 5.1% were O. viverrini; 2.6% H. pumilio; and 2.6% were Procerovum sp. These are the first reports of H. pumilio, Procerovum sp., and O. viverrini metacercariae in Vietnamese fish. These results indicate that consumption of improperly prepared fish represents a significant risk of acquiring FZTs in this south Vietnam region.

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Bui Ngoc Thanh, Anders Dalsgaard, Øystein Evensen, K. Darwin Murrell
Foodborne Pathogens and Disease.2009; 6(8): 1037. CrossRef
Prevalence and risks for fishborne zoonotic trematode infections in domestic animals in a highly endemic area of North Vietnam
Nguyen Thi Lan Anh, Nguyen Thi Phuong, Maria Vang Johansen, K. Darwin Murrell, Phan Thi Van, Anders Dalsgaard, Luong To Thu, Stig Milan Thamsborg
Acta Tropica.2009; 112(2): 198. CrossRef
Prevalence of zoonotic trematode parasites in fish fry and juveniles in fish farms of the Mekong Delta, Vietnam
Cu Pham Thien, Anders Dalsgaard, Nguyen Thanh Nhan, Annette Olsen, K. Darwin Murrell
Aquaculture.2009; 295(1-2): 1. CrossRef
Life cycle stages of heterophyid trematodes in Vietnamese freshwater fishes traced by molecular and morphometric methods
Jakob Skov, Per W. Kania, Anders Dalsgaard, Thomas R. Jørgensen, Kurt Buchmann
Veterinary Parasitology.2009; 160(1-2): 66. CrossRef
Discovery of Opisthorchis viverrini metacercariae in freshwater fish in southern Cambodia
Sarun Touch, Chalit Komalamisra, Prayong Radomyos, Jitra Waikagul
Acta Tropica.2009; 111(2): 108. CrossRef
Haplorchis pumilio and H. taichui in Vietnam discriminated using ITS-2 DNA sequence data from adults and larvae
Kim Van Van, Anders Dalsgaard, David Blair, Thanh Hoa Le
Experimental Parasitology.2009; 123(2): 146. CrossRef
Optimization of an Experimental Model for the Recovery of Adult Haplorchis pumilio (Heterophyidae: Digenea)
Helle Kay, K. Darwin Murrell, Axel Kornerup Hansen, Henry Madsen, Nguyễn Thi Thu Trang, Nguyen Manh Hung, Anders Dalsgaard
Journal of Parasitology.2009; 95(3): 629. CrossRef
Fishborne Zoonotic Trematodes in Raw Fish Dishes Served in Restaurants in Nam Dinh Province and Hanoi, Vietnam
Tran Thi Kim Chi, K.Darwin Murrell, Henry Madsen, Nguyen Viet Khue, Anders Dalsgaard
Journal of Food Protection.2009; 72(11): 2394. CrossRef
Food-Borne Trematodiases
Jennifer Keiser, Jürg Utzinger
Clinical Microbiology Reviews.2009; 22(3): 466. CrossRef
Prevalence of Zoonotic Trematodes in Fish from a Vietnamese Fish-Farming Community
Tran T. K. Chi, Anders Dalsgaard, James F. Turnbull, Pham A. Tuan, K. Darwin Murrell
Journal of Parasitology.2008; 94(2): 423. CrossRef
Prevalence of Zoonotic Metacercariae in Two Species of Grouper, Epinephelus coioides and Epinephelus bleekeri, and Flathead Mullet, Mugil cephalus, in Vietnam
Dung The Vo, Darwin Murrell, Anders Dalsgaard, Glenn Bristow, Dung Huu Nguyen, Thanh Ngoc Bui, Dung Thi Vo
The Korean Journal of Parasitology.2008; 46(2): 77. CrossRef
Prevalence of fishborne zoonotic parasites in important cultured fish species in the Mekong Delta, Vietnam
Pham Cu Thien, Anders Dalsgaard, Bui Ngoc Thanh, Annette Olsen, K. Darwin Murrell
Parasitology Research.2007; 101(5): 1277. CrossRef
Occurrence and species distribution of fishborne zoonotic trematodes in wastewater‐fed aquaculture in northern Vietnam
Nguyen Thi Hop, Nguyen Van De, Darwin Murrell, Anders Dalsgaard
Tropical Medicine & International Health.2007; 12(s2): 66. CrossRef
Fishborne Zoonotic Intestinal Trematodes, Vietnam
Do Trung Dung, Nguyen Van De, Jitra Waikagul, Anders Dalsgaard, Jong-Yil Chai, Woon-Mok Sohn, K. Darwin Murrell
Emerging Infectious Diseases.2007; 13(12): 1828. CrossRef