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Muñoz L, Sepúlveda-Calderón P, Villaguala-Pacheco C, Aqueveque CL. Copro-prevalence of Fasciola hepatica in Chilean breed horses in the province of Concepción, Chile. ACTA ACUST UNITED AC 2020; 29:e019019. [PMID: 32609241 DOI: 10.1590/s1984-29612020020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/11/2020] [Indexed: 11/22/2022]
Abstract
The aim of this research was to assess the copro-prevalence of Fasciola hepatica in owned Chilean breed horses (Equus caballus) residing in the province of Concepción, Chile. The study was carried out throughout October 2017. Samples were taken from all (100%) Chilean breed horse (124 specimens; 45 females and 79 males, aged between 7 months and 24 years old) from the Concepción province. A rectal stool sample was obtained from each animal. This was analyzed using the Army Medical School method (AMS III) technique to detect F. hepatica eggs. Information about the horse's age, sex, previous fasciolicide application, and an assessment of body condition was also obtained. Fisher tests were carried out to analyze the results. Ten horses (8.06%) were positive for the presence of F. hepatica eggs. No significant difference of copro-prevalence was found between age (young 8.47%, old 7.69%), sex (female 11.1%, male 6.33%), the previous application of fasciolicide (dewormed 10%, not dewormed 7.89%), or body condition (low condition 11.1%, high condition 0.7%) categories (Fisher tests: P>0.05 in all cases). The results of this study suggest that Chilean breed horses constitute part of the reservoir of F. hepatica for both ruminant populations and humans in the Concepción province.
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Affiliation(s)
- Lisandro Muñoz
- Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
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Choi JH, Park SK, Park MK, Kang SA, Lee D, Song SM, Kim HJ, Park SH, Kim EM, Yu HS. An advanced protocol for the purification of whipworm eggs from feces for use as therapeutic agents. Parasitol Int 2019; 70:41-45. [PMID: 30716463 DOI: 10.1016/j.parint.2019.01.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 01/31/2019] [Accepted: 01/31/2019] [Indexed: 01/03/2023]
Abstract
Recent studies have attempted to treat autoimmune diseases using Trichuris suis. whipworm) eggs. Large quantities of eggs can be obtained efficiently by collecting from the feces of the porcine hosts rather than by extracting from the female worm uterus. However, it is difficult to process large amounts of feces using the current methods. In the present study, we propose a method to collect the eggs from bulk feces more efficiently. Collecting the eggs using washing meshes (25 μm sieve) yields 65.7% (56.0-70.7) of eggs (median, min-max) from 100 g feces. Our method, which uses ethyl acetate and simulated gastric fluid, yielded 91.4% (91.4-94.0) of the eggs from 100 g feces into the separated aqueous solution. Egg collection using simulated gastric fluid (SGF) method was also 60 min faster than that using the sieve method. As the SGF used in the experiment is a strongly acidic reagent with a pH of 1-2, embryonation of the eggs was induced by the rapid pH change. As a result, 37.1% (8.0-77.8) of the eggs had embryonated two months after SGF stimulation. Using the developed method, we could process the feces quickly and efficiently. Furthermore, after purification, egg embryonation could be induced without any harmful reagent treatment. This method is expected to be helpful for further research using Trichuris suis eggs.
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Affiliation(s)
- Jun Ho Choi
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea
| | - Sang Kyun Park
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea
| | - Mi Kyung Park
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea
| | - Shin Ae Kang
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea
| | - Dain Lee
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea
| | - So Myong Song
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea
| | - Hye Jin Kim
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea
| | - Sung Hee Park
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea
| | - Eun-Min Kim
- Department of Environmental Medical Biology and Arthropods of Medical Importance Resource Research Bank, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Hak Sun Yu
- Department of Parasitology, School of Medicine, Pusan National University, Immunoregulatory Therapeutics group in Brain Busan 21 project, Republic of Korea.
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Irie T, Yamaguchi Y, Doanh PN, Guo ZH, Habe S, Horii Y, Nonaka N. Infection with Paragonimus westermani of boar-hunting dogs in Western Japan maintained via artificial feeding with wild boar meat by hunters. J Vet Med Sci 2017; 79:1419-1425. [PMID: 28717056 PMCID: PMC5573832 DOI: 10.1292/jvms.17-0149] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Infection of boar-hunting dogs with Paragonimus westermani was
investigated in Western Japan. Blood and rectal feces were collected from 441 dogs in the
three districts (205 in Kinki, 131 in Chugoku and 105 in Shikoku District). In a screening
ELISA for serum antibody against P. westermani antigen, 195 dogs (44.2%)
showed positive reaction. In the 195 dogs, 8 dogs were found excreting P.
westermani eggs after molecular analysis of fecal eggs, and additional 7 were
identified serologically for the parasite infection because of their stronger reactivity
against P. westermani antigen than against antigens of other species of
Paragonimus. A spatial analysis showed that all of the P.
westermani infections were found in Kinki and Chugoku Districts. In this area,
dogs’ experience of being fed with raw boar meat showed high odds ratio (3.35) to the
sero-positivity in the screening ELISA, and the frequency of such experiences was
significantly higher in sero-positive dogs. While clear relationship was not obtained
between predation of boars by dogs during hunting and their sero-positivity. Therefore, it
is suggested that human activity of feeding with wild boar meat is the risk factor for
P. westermani infection in boar-hunting dogs. Considering that hunting
dogs could play as a major definitive host and maintain the present distribution of
P. westermani in Western Japan, control measures for the infection in
hunting dogs, such as prohibition of raw meat feeding and regular deworming, should be
undertaken.
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Affiliation(s)
- Takao Irie
- Laboratory of Veterinary Parasitic Diseases, Interdisciplinary Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan.,Medical Zoology Group, Department of Infectious Diseases, Hokkaido Institute of Public Health, North 19, West 12, Kitaku, Sapporo, Hokkaido 060-0819, Japan
| | - Yohei Yamaguchi
- Laboratory of Veterinary Parasitic Diseases, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan
| | - Pham Ngoc Doanh
- Laboratory of Veterinary Parasitic Diseases, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan.,Departement of Parasitology, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
| | - Zhi Hong Guo
- Laboratory of Veterinary Parasitic Diseases, Interdisciplinary Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan
| | - Shigehisa Habe
- Department of Microbiology and Immunology, School of Medicine, Fukuoka University, 7-45-1 Nanakuma, Fukuoka Jonan-ku, Fukuoka 814-0180, Japan
| | - Yoichiro Horii
- Laboratory of Veterinary Parasitic Diseases, Interdisciplinary Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan.,Laboratory of Veterinary Parasitic Diseases, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan.,Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan
| | - Nariaki Nonaka
- Laboratory of Veterinary Parasitic Diseases, Interdisciplinary Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan.,Laboratory of Veterinary Parasitic Diseases, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan.,Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan
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