|
1
|
Hébert L, Froger D, Madeline A, Lecouturier F, Lemans C, Zientara S. European Inter-Laboratory Proficiency Test for Dourine Antibody Detection Using the Complement Fixation Test. Vet Sci 2023; 10:592. [PMID: 37888544 PMCID: PMC10610798 DOI: 10.3390/vetsci10100592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023] Open
Abstract
Dourine is a sexually transmitted parasitic disease affecting equids. Its causative agent is referred to as Trypanosoma equiperdum and the prescribed serodiagnosis method is the complement fixation test (CFT). In the context of our European Reference Laboratory mandate for equine diseases (excluding African horse sickness), we organised dourine CFT inter-laboratory proficiency tests (ILPTs) in 2015, 2018 and 2022 to evaluate the performance of the European Union network of National Reference Laboratories (NRLs) for dourine. ILPT panels were composed of horse sera with or without antibodies against Trypanosoma spp. originating from non-infected, immunised or experimentally infected horses. Twenty-two NRLs participated in at least one of the three sessions. In 2015, 2018 and 2022, the percentage of laboratories obtaining 100% of the expected results was 57, 90 and 80, respectively. These dourine CFT ILPTs showed the benefits of standardising the method's detection limit and underlined the constant need to evaluate NRLs to improve the network's performance. These results also argue in favour of the need for a representative bio-bank to improve the representativeness of ILPT samples and to allow the adoption of alternative serological methods for international surveillance of dourine.
Collapse
Affiliation(s)
- Laurent Hébert
- Unité Physiopathologie et Epidémiologie des Maladies Equines (PhEED), Laboratoire de Santé Animale, Site de Normandie, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), RD675, 14430 Goustranville, France; (D.F.); (A.M.); (F.L.); (C.L.)
| | - Delphine Froger
- Unité Physiopathologie et Epidémiologie des Maladies Equines (PhEED), Laboratoire de Santé Animale, Site de Normandie, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), RD675, 14430 Goustranville, France; (D.F.); (A.M.); (F.L.); (C.L.)
| | - Anthony Madeline
- Unité Physiopathologie et Epidémiologie des Maladies Equines (PhEED), Laboratoire de Santé Animale, Site de Normandie, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), RD675, 14430 Goustranville, France; (D.F.); (A.M.); (F.L.); (C.L.)
| | - Fanny Lecouturier
- Unité Physiopathologie et Epidémiologie des Maladies Equines (PhEED), Laboratoire de Santé Animale, Site de Normandie, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), RD675, 14430 Goustranville, France; (D.F.); (A.M.); (F.L.); (C.L.)
| | - Charlène Lemans
- Unité Physiopathologie et Epidémiologie des Maladies Equines (PhEED), Laboratoire de Santé Animale, Site de Normandie, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), RD675, 14430 Goustranville, France; (D.F.); (A.M.); (F.L.); (C.L.)
| | - Stephan Zientara
- UMR 1161 Virologie, Laboratoire de Santé Animale, Site de Maisons-Alfort, ANSES, Institut National de Recherche Pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Ecole Nationale Vétérinaire d’Alfort (ENVA), 94700 Maisons-Alfort, France;
| |
Collapse
|
|
2
|
Hong Y, Suganuma K, Ohari Y, Kayano M, Nakazaki K, Fukumoto S, Kawazu SI, Inoue N. Seasonal Variation and Factors Affecting Trypanosoma theileri Infection in Wild Sika Deer (Ezo Sika Deer Cervus nippon yesoensis) in Eastern Hokkaido. Animals (Basel) 2023; 13:ani13101707. [PMID: 37238137 DOI: 10.3390/ani13101707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 05/28/2023] Open
Abstract
Trypanosoma (Megatrypanum) spp. are isolated from domestic and wild ruminants, including deer, worldwide. The prevalence of trypanosomes in mammals is influenced by a number of factors such as host age and vector abundance. However, the seasonal variation of and factors affecting trypanosome infection in the wild deer population remain elusive. In this study, we analyzed the seasonal variation in trypanosome prevalence and the factors that affect Trypanosoma theileri Laveran, 1902, infection in wild sika deer (Ezo sika deer) Cervus nippon yesoensis (Heude, 1884) in Eastern Hokkaido through a two-year survey. Seasonal variation in the prevalence of trypanosome infection in the deer population ranged from 0 to 41% as per hematocrit concentration and 17 to 89% as per PCR results. In general, the prevalence of T. theileri by PCR in 2020 was higher than that in 2019. Moreover, the prevalence was significantly higher in the aged population than among the younger population. These findings may explain why individual conditions and sampling season were associated with trypanosome prevalence. This is the first study to investigate the seasonal variation in and risk factors affecting trypanosome infection in wild deer.
Collapse
Affiliation(s)
- Yujon Hong
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro 080-8555, Hokkaido, Japan
| | - Keisuke Suganuma
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro 080-8555, Hokkaido, Japan
- Research Center for Global Agromedicine, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro 080-8555, Hokkaido, Japan
| | - Yuma Ohari
- Division of Risk Analysis and Management, International Institute for Zoonosis Control, Hokkaido University, Kita 20 Jyo Nishi 10, Sapporo 001-0020, Hokkaido, Japan
| | - Mitsunori Kayano
- Research Center for Global Agromedicine, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro 080-8555, Hokkaido, Japan
| | - Kenji Nakazaki
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro 080-8555, Hokkaido, Japan
| | - Shinya Fukumoto
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro 080-8555, Hokkaido, Japan
| | - Shin-Ichiro Kawazu
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro 080-8555, Hokkaido, Japan
| | - Noboru Inoue
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro 080-8555, Hokkaido, Japan
| |
Collapse
|
|
3
|
Nurbyek S, Buyankhishig B, Suganuma K, Ishikawa Y, Kutsuma M, Abe M, Sasaki K, Davaapurev BO, Batkhuu J, Murata T. Phytochemical investigation of Scutellaria scordiifolia and its trypanocidal activity. PHYTOCHEMISTRY 2023; 209:113615. [PMID: 36828100 DOI: 10.1016/j.phytochem.2023.113615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 02/17/2023] [Accepted: 02/19/2023] [Indexed: 06/18/2023]
Abstract
Scutellaria scordiifolia Fisch. ex Schrank is used to treat various inflammatory diseases and other ailments in traditional and contemporary medicine. In this study, 10 undescribed compounds, including a flavanone (1), four chrysin C-glycosides (2-5), a phenanthrene glucoside (6), four iridoid glucosides (7-10) and 31 known compounds were identified from an extract of the aerial parts of S. scordiifolia. The absolute configurations of sugars in C-glycosides were determined by comparing electric circular dichroism spectra with calculated data. The flavanones (1 and 17), flavonols (11-13), flavone (14), and some of the flavone glucuronides (15, 16) exhibited trypanocidal activities against Trypanosoma congolense. The activity data and quantitative HPLC analysis of flavonoids from the aerial parts of S. scordiifolia suggest that they may effectively treat diseases caused by the aforementioned trypanosomes. Other compounds such as novel iridoids and phenanthrene glycosides, which may be useful for chemophenetic and chemoecological discussions, were also identified.
Collapse
Affiliation(s)
- Stipan Nurbyek
- Division of Pharmacognosy, Tohoku Medical and Pharmaceutical University, 4-1 Komatsushima 4-chome Aoba-ku, Sendai, 981-8558, Japan; School of Engineering and Applied Sciences, National University of Mongolia, Ulaanbaatar, 14201, Mongolia
| | - Buyanmandakh Buyankhishig
- Division of Pharmacognosy, Tohoku Medical and Pharmaceutical University, 4-1 Komatsushima 4-chome Aoba-ku, Sendai, 981-8558, Japan; School of Engineering and Applied Sciences, National University of Mongolia, Ulaanbaatar, 14201, Mongolia
| | - Keisuke Suganuma
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro, Hokkaido, 080-8555, Japan
| | - Yoshinobu Ishikawa
- Faculty of Pharmaceutical Sciences, Shonan University of Medical Sciences, 16-48 Kamishinano, Totsuka-ku, Yokohama, 244-0806, Japan
| | - Mika Kutsuma
- Division of Pharmacognosy, Tohoku Medical and Pharmaceutical University, 4-1 Komatsushima 4-chome Aoba-ku, Sendai, 981-8558, Japan
| | - Marie Abe
- Division of Pharmacognosy, Tohoku Medical and Pharmaceutical University, 4-1 Komatsushima 4-chome Aoba-ku, Sendai, 981-8558, Japan
| | - Kenroh Sasaki
- Division of Pharmacognosy, Tohoku Medical and Pharmaceutical University, 4-1 Komatsushima 4-chome Aoba-ku, Sendai, 981-8558, Japan
| | - Bekh-Ochir Davaapurev
- School of Engineering and Applied Sciences, National University of Mongolia, Ulaanbaatar, 14201, Mongolia
| | - Javzan Batkhuu
- School of Engineering and Applied Sciences, National University of Mongolia, Ulaanbaatar, 14201, Mongolia
| | - Toshihiro Murata
- Division of Pharmacognosy, Tohoku Medical and Pharmaceutical University, 4-1 Komatsushima 4-chome Aoba-ku, Sendai, 981-8558, Japan.
| |
Collapse
|
|
4
|
Risk factors for equine trypanosomosis and hematological analysis of horses in Paraguay. Acta Trop 2022; 233:106543. [PMID: 35643185 DOI: 10.1016/j.actatropica.2022.106543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 11/23/2022]
Abstract
Animal trypanosomosis, caused by Trypanozoon trypanosomes (Trypanosoma evansi and T. equiperdum), and Trypanosoma vivax, is endemic to South American countries and has a negative impact on the livestock industry. However, the risk factors for trypanosomosis in Paraguay remain unknown. This study aimed to determine the risk factors for equine trypanosomosis in Paraguay based on a PCR-based molecular survey and individual horse sampling data. In this study, 739 blood samples were collected from horses in 16 departments of Paraguay between August 2019 and November 2020. To elucidate the risk factors for trypanosome infection, the relationship between trypanosome infection status detected by PCR and the location, sex, age, breed of horses, and season of sample collection was analyzed. There were no significant differences in trypanosome prevalence in horses between the eastern and western regions, ages, or breeds of horses in Paraguay. Sex and season were identified as risk factors for trypanosome infection in horses in Paraguay in the current study. These results suggest that the rainy-summer season, when vectors increase in number and their blood-sucking activity, could be the most important risk factor for trypanosome infection in Paraguay horses. Preventive measures and treatments should be developed to address these factors.
Collapse
|