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Rubilar A, Torres P, Year H, Leyan V, Silva R. First Report of Zoonotic Tapeworms, Dibothriocephalus latus (Linnaeus, 1758) and D. dendriticus (Nitzsch, 1824), and Other Endohelminth Parasites in Chinook Salmon, Oncorhynchus tshawytscha, in Chile. COMP PARASITOL 2022. [DOI: 10.1654/copa-d-20-00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alonso Rubilar
- Instituto de Parasitología, Facultad de Medicina, Edificio de Ciencias Biomédicas, Campus Isla Teja, Universidad Austral de Chile, Valdivia, Chile (e-mail: ),
| | - Patricio Torres
- Instituto de Parasitología, Facultad de Medicina, Edificio de Ciencias Biomédicas, Campus Isla Teja, Universidad Austral de Chile, Valdivia, Chile (e-mail: ),
| | - Helene Year
- Laboratoire de Parasitologie Mycologie, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, Centre Université de Paris, Institut Cochin (U1016 Inserm/UMR8104 CNRS/UMR-S8104), Paris, France (e-mail: ),
| | - Victor Leyan
- Instituto de Inmunología, Facultad de Medicina, Edificio de Ciencias Biomédicas, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile (e-mail: ), and
| | - Ricardo Silva
- Unidad de Microscopía Electrónica, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile (e-mail: )
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Muñoz-Caro T, Machuca A, Morales P, Verdugo J, Reyes R, García M, Rutaihwa L, Schindler T, Poppert S, Taubert A, Hermosilla C. Prevalence and molecular identification of zoonotic Anisakis and Pseudoterranova species in fish destined to human consumption in Chile. Parasitol Res 2022; 121:1295-1304. [PMID: 35230547 PMCID: PMC8993782 DOI: 10.1007/s00436-022-07459-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 01/30/2022] [Indexed: 10/26/2022]
Abstract
Zoonotic larvae of the family Anisakidae found in several fish species represent a serious risk in public health since they may cause food-borne anisakidosis in humans. Chile has culinary preferences including eating raw fish in many traditional preparations. In the present study, a total of 180 fish specimens representing three different fish species, i.e., Chilean hake (Merluccius gayi), snoek (Thyrsites atun), and sea bream (Brama australis), were caught at central coast of Chile. Parasitological examination was performed on musculature and abdominal cavity for subsequent extraction and quantification of anisakid larvae. Estimation of infection parameters, such as prevalence, was performed indicating 100% (CI: 0.94-1.0) prevalence of anisakid L3 in Chilean hakes and snoeks. Moreover, sea breams reached a prevalence of 35% (CI: 0.23-0.48). Prevalence of anisakid larvae in muscle was also analyzed showing values of 18.6% (CI: 0.097-0.309) in Chilean hakes, 15% (CI: 0.07-0.26) in snoeks, and 1.7% (CI: 0-0.089) in sea breams. Meanwhile, prevalence of anisakid larvae in internal organs showed highest values for peritoneum (100% and 83.3%) for snoeks and Chilean hakes, respectively, for liver (96.7%) and gonads (86.6%) in Chilean hakes, and for intestine (98.3%) in snoeks. Molecular analysis of collected anisakid L3 unveiled presence of two potentially zoonotic nematode species, i.e., Pseudoterranova cattani and Anisakis pegreffii. P. cattani was found in Chilean hakes and snoeks being the first molecular host species report for Chilean snoeks. Besides, A. pegreffii was also identified in these species being the first molecular report on this regard. These findings are relevant for better understanding of epidemiology of anisakiasis in Chilean coasts and for public health issues considering potential risk of human population due to its culinary preferences in eating raw fish.
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Affiliation(s)
- Tamara Muñoz-Caro
- Escuela de Medicina Veterinaria, Facultad de Medicina Veterinaria Y Recursos Naturales, Universidad Santo Tomás, Talca, Chile
| | - Alvaro Machuca
- Escuela de Medicina Veterinaria, Facultad de Medicina Veterinaria Y Recursos Naturales, Universidad Santo Tomás, Talca, Chile
| | - Pamela Morales
- Escuela de Medicina Veterinaria, Facultad de Medicina Veterinaria Y Recursos Naturales, Universidad Santo Tomás, Talca, Chile
| | - Javiera Verdugo
- Escuela de Medicina Veterinaria, Facultad de Medicina Veterinaria Y Recursos Naturales, Universidad Santo Tomás, Talca, Chile
| | - Rodrigo Reyes
- Escuela de Medicina Veterinaria, Facultad de Medicina Veterinaria Y Recursos Naturales, Universidad Santo Tomás, Talca, Chile
| | - Macarena García
- Escuela de Medicina Veterinaria, Facultad de Medicina Veterinaria Y Recursos Naturales, Universidad Santo Tomás, Talca, Chile
| | | | | | - Sven Poppert
- Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Anja Taubert
- Institute of Parasitology, Justus Liebig University Giessen, Giessen, Germany
| | - Carlos Hermosilla
- Institute of Parasitology, Justus Liebig University Giessen, Giessen, Germany.
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Williams M, Hernandez-Jover M, Shamsi S. A Critical Appraisal of Global Testing Protocols for Zoonotic Parasites in Imported Seafood Applied to Seafood Safety in Australia. Foods 2020; 9:foods9040448. [PMID: 32272621 PMCID: PMC7230297 DOI: 10.3390/foods9040448] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/02/2020] [Accepted: 04/02/2020] [Indexed: 11/19/2022] Open
Abstract
It is not suggested that any country is intentionally exporting seafood which does not comply with Codex seafood-safety guidelines/codes/standards. However, with an open access resource such as fisheries, there is vast potential for errors to occur along convoluted supply chains, spanning multiple countries, which may negatively impact the safety of edible seafood products imported into Australia. Australian importation policy and inspection procedures are founded upon a bedrock of trust in the integrity, reliability and safety of the global seafood supply chain. In order for seafood imported to Australia to be considered safe the non-mandatory international health standards, governed by Codex Alimentarius, for seafood must be predicated upon the most efficacious methods and stringently governed by each exporting provenance. Currently, tests for zoonotic parasites are not applied to imported edible seafood products on arrival into Australia. Therefore, this critical analysis is aimed at discussing the effectiveness of current testing protocols for zoonotic parasites in edible seafood advised by Codex Alimentarius which may impact the safety of the product imported into Australia.
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Torres P, Aedo E, Silva R, Thibaut J, Torres-Frenzel P. First Case of Zoonotic Tapeworm Adenocephalus cf. pacificus from Coho Salmon Oncorhynchus kisutch in Chile: Experimental Development Study. COMP PARASITOL 2019. [DOI: 10.1654/1525-2647-86.1.17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Patricio Torres
- Instituto de Parasitología, Facultad de Medicina, Edifício de Ciencias Biomédicas, Campus Isla Teja,
| | - Eduardo Aedo
- Unidad de Estudios Regionales de la Trapananda, Campus Patagonia, Universidad Austral de Chile, Coyh
| | - Ricardo Silva
- Instituto de Anatomia, Histología y Patología, Facultad de Medicina, Edificio de Ciencias Biomédicas
| | - Julio Thibaut
- Instituto de Ciencias Clínicas Veterinarias, Facultad de Ciencias Veterinarias, Universidad Austral
| | - Pablo Torres-Frenzel
- Instituto de Parasitología, Facultad de Medicina, Edifício de Ciencias Biomédicas, Campus Isla Teja,
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Alves PV, de Chambrier A, Scholz T, Luque JL. Annotated checklist of fish cestodes from South America. Zookeys 2017; 650:1-205. [PMID: 28331385 PMCID: PMC5345339 DOI: 10.3897/zookeys.650.10982] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 12/21/2016] [Indexed: 01/18/2023] Open
Abstract
An exhaustive literature search supplemented by a critical examination of records made it possible to present an annotated checklist of tapeworms (Cestoda) that, as adults or larvae (metacestodes), parasitize freshwater, brackish water and marine fishes, i.e. cartilaginous and bony fishes, in South America. The current knowledge of their species diversity, host associations and geographical distribution is reviewed. Taxonomic problems are discussed based on a critical evaluation of the literature and information on DNA sequences of individual taxa is provided to facilitate future taxonomic and phylogenetic studies. As expected, the current knowledge is quite uneven regarding the number of taxa and host-associations reported from the principal river basins and marine ecoregions. These differences may not only reflect the actual cestode richness but may also be due to the research effort that has been devoted to unravelling the diversity of these endoparasitic helminths in individual countries. A total of 297 valid species, 61 taxa identified to the generic level, in addition to unidentified cestodes, were recorded from 401 species of fish hosts. Among the recognized cestode orders, 13 have been recorded in South America, with the Onchoproteocephalidea displaying the highest species richness, representing c. 50% of all species diversity. The majority of records include teleost fish hosts (79%) that harbour larval and adult stages of cestodes, whereas stingrays (Myliobatiformes) exhibit the highest proportion of records (39%) among the elasmobranch hosts. Fish cestodes are ubiquitous in South America, being mostly recorded from the Warm Temperate Southeastern Pacific (WTSP; 31%) for marine hosts and the Amazon River basin (45%) for freshwater ones. The following problems were detected during the compilation of literary data: (i) unreliability of many records; (ii) poor taxonomic resolution, i.e. identification made only to the genus or even family level; (iii) doubtful host identification; and (iv) the absence of voucher specimens that would enable us to verify identification. It is thus strongly recommended to always deposit representative specimens in any type of studies, including faunal surveys and ecological studies. An analysis of the proportion of three basic types of studies, i.e. surveys, taxonomic and ecological papers, has shown a considerable increase of ecological studies over the last decade.
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Affiliation(s)
- Philippe V. Alves
- Programa de Pós-Graduação em Biologia Animal, Universidade Federal Rural do Rio de Janeiro, BR 465, Km 7, 23851-970, Seropédica, Rio de Janeiro, Brazil
| | - Alain de Chambrier
- Natural History Museum of Geneva, CP 6434, CH - 1211 Geneva 6, Switzerland
| | - Tomáš Scholz
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - José L. Luque
- Departamento de Parasitologia Animal, Universidade Federal Rural do Rio de Janeiro, CP 74.540, BR 465, Km 7, 23851-970, Seropédica, Rio de Janeiro, Brazil
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Torres-Frenzel P, Torres P. Anisakid parasites in commercial hake ceviche in southern Chile. J Food Prot 2014; 77:1237-40. [PMID: 24988037 DOI: 10.4315/0362-028x.jfp-13-538] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of this research was to determine the occurrence of anisakid nematode larvae in hake ceviche sold in restaurants in Valdivia (39°48'S, 73°14'W) and Niebla (39°49'S, 73°22'W), Chile. Between August and November 2012, 78 portions of ceviche were collected (6 from each of the 13 restaurants that sell this product). Each portion was weighed and divided into approximately 30-g samples, which were placed in petri dishes with 0.15 M NaCl. All samples were manually shredded and then examined with a stereomicroscope. Muscles of 41 southern hake (Merluccius australis), a fish sold fresh in Valdivia, also were examined by candling to determine the presence of anisakid larvae. The presence of Pseudoterranova larvae in ceviche sold in Chile was identified for the first time. The pH of ceviche ranges from 4.1 to 4.8, which favors the presence of viable anisakid larvae that tolerate the acid pH similar to that found in the stomach of their mammalian host. No significant differences (P > 0.05) in the prevalence, mean abundance, and mean density of anisakid larvae in ceviche were found between localities. Larvae were detected in ceviche from 3 of 6 restaurants in Valdivia and 4 of 7 restaurants in Niebla. Of the 78 examined portions of ceviche, 21.8% had larvae. The prevalence of viable larvae was 16.7 and 7.1% in the examined portions from Valdivia and Niebla, respectively. In the 41 hake muscle samples from Valdivia, the prevalence (4.9%), mean abundance (0.1), and mean density (0.03) was the same for Pseudoterranova and Anisakis larvae. No inspection processes or pretreatments are currently in place for raw fish to achieve safe conditions for ceviche in restaurants from Valdivia and Niebla.
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Affiliation(s)
- Pablo Torres-Frenzel
- Escuela de Ingeniería en Alimentos, Facultad de Ciencias Agrarias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
| | - Patricio Torres
- Instituto de Parasitología, Edificio de Ciencias Biomédicas, Facultad de Medicina, Campus Isla Teja, Universidad Austral de Chile, Casilla 567, Valdivia, Chile.
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Rozas M, Bohle H, Sandoval A, Ildefonso R, Navarrete A, Bustos P. First molecular identification of Diphyllobothrium dendriticum plerocercoids from feral rainbow trout (Oncorhynchus mykiss) in Chile. J Parasitol 2012; 98:1220-6. [PMID: 22715967 DOI: 10.1645/jp-ge-3097.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Between April and June 2009, 1,075 feral rainbow trout from 10 different lakes involved with aquaculture activities in Los Lagos Region, Chile, were inspected for Diphyllobothrium species. All viscera and muscles of the fish were examined using stereomicroscopy; pyloric cecae and stomachs infected with plerocercoids were checked by histology and scanning electron microscopy. Plerocercoids of Diphyllobothrium dendriticum were confirmed by PCR and sequencing of COI and 18S rRNA + ITS1 + 5.8S rRNA + ITS2 genes for the first time in Chile. Overall prevalence of plerocercoids of D. dendriticum was 9.2% (99/1,075) in Los Lagos Region and 17.4% (99/570) for Chiloe Island. Plerocercoids were not detected in the continental lakes of the Los Lagos Region (Chapo, Rupanco, and Llanquihue). Tarahuín Lake exhibited a prevalence of 50.9% (81/159), Cucao Lake 5.1% (4/79), Natri Lake 4.7% (5/107), Huillinco Lake 3.6% (5/138), and San Antonio Lake 66.7% (4/6). Abundance was 1.1 plerocercoid larvae per fish (1,169 larvae/1,075 fish). All the plerocercoids were found encysted in the viscera of the fish. Plerocercoids were 10.9 ± 3 (7-16) mm long by 0.4 ± 0.2 (0.2-0.6) mm wide. The scolex was enlarged, with 2 bothria and a frontal pit. The body was covered with short capilliform filitriches, 4-6 mm long. The Chilean COI and 18SrRNA + ITS1 + 5.8SrRNA + ITS2 gene sequences indicated 96.34-96.52% and 99% similarity with D. dendriticum sequences, respectively. Diphyllobothrium dendriticum is reported for the first time in freshwater ecosystems as far as 43 ° S on Chiloe Island. These findings and previous reports of plerocercoids of Diphyllobothrium spp. in farmed rainbow trout at Tarahuín Lake support the putative life cycle of this parasite in lakes of southern Chile where there are aquaculture activities.
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Affiliation(s)
- M Rozas
- ADL Diagnostic Chile Ltd, Sector La Vara Km 8, Camino a Alerce, Puerto Montt, Chile.
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