The Role of Nile Tilapia (Oreochromis niloticus) in the Life Cycle of Toxocara spp.
The present study aimed to experimentally assess Nile tilapia as potential paratenic host of Toxocara spp. A total of 15 Nile tilapia (Oreochromis niloticus) were fed with 300 embryonated Toxocara canis eggs by oral gavage, while five others of the control group received distilled water. The fish we...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-06-01
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| Series: | Frontiers in Veterinary Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fvets.2021.685911/full |
| _version_ | 1819084658927730688 |
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| author | Everton André de Oliveira Yslla Fernanda Fitz Balo Merigueti Isabella Braghin Ferreira Isabele Santos Garcia Alini Soriano Pereira Rosemeire de Souza Santos Louise Bach Kmetiuk Andrea Pires dos Santos Alexander Welker Biondo Rogerio Giuffrida Vamilton Alvares Santarém |
| author_facet | Everton André de Oliveira Yslla Fernanda Fitz Balo Merigueti Isabella Braghin Ferreira Isabele Santos Garcia Alini Soriano Pereira Rosemeire de Souza Santos Louise Bach Kmetiuk Andrea Pires dos Santos Alexander Welker Biondo Rogerio Giuffrida Vamilton Alvares Santarém |
| author_sort | Everton André de Oliveira |
| collection | DOAJ |
| description | The present study aimed to experimentally assess Nile tilapia as potential paratenic host of Toxocara spp. A total of 15 Nile tilapia (Oreochromis niloticus) were fed with 300 embryonated Toxocara canis eggs by oral gavage, while five others of the control group received distilled water. The fish were individually analyzed at 16, 24, 48, 72, and 240 h after inoculation. Water contamination was assessed, and tissue migration by liver, gastrointestinal tract (GIT), eyes, and central nervous system. A murine model was used as the paratenic host for egg infectivity assessment. Eggs and larvae were found in plastic tank water and fish GIT, ranging from 23 to 86% per fish. Eggs and larvae were recovered from the tank water (76.3%) and fish GIT (23.7%). The counting of eggs and larvae observed was negatively correlated with number of eggs and larvae in the water tank (rho = −0.698, p = 0.003). Shedding of embryonated eggs was first detected at 16 and up to 240 h, with significant egg and larvae yield decrease on water-shedding (p = 0.001) and in the GIT (p = 0.007). Although no T. canis larva was recovered in fish tissues, egg infectivity after fish GIT transit was experimentally confirmed by mice assessment. In conclusion, despite shedding viable embryonated eggs through the gastrointestinal tract, tilapias may not play a role as a suitable paratenic hosts for Toxocara spp., posing low risk of zoonotic transmission by fish meat consumption. |
| first_indexed | 2024-12-21T20:51:58Z |
| format | Article |
| id | doaj.art-61f7c11194da4324a14e4de3472ac2ac |
| institution | Directory Open Access Journal |
| issn | 2297-1769 |
| language | English |
| last_indexed | 2024-12-21T20:51:58Z |
| publishDate | 2021-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Veterinary Science |
| spelling | doaj.art-61f7c11194da4324a14e4de3472ac2ac2022-12-21T18:50:41ZengFrontiers Media S.A.Frontiers in Veterinary Science2297-17692021-06-01810.3389/fvets.2021.685911685911The Role of Nile Tilapia (Oreochromis niloticus) in the Life Cycle of Toxocara spp.Everton André de Oliveira0Yslla Fernanda Fitz Balo Merigueti1Isabella Braghin Ferreira2Isabele Santos Garcia3Alini Soriano Pereira4Rosemeire de Souza Santos5Louise Bach Kmetiuk6Andrea Pires dos Santos7Alexander Welker Biondo8Rogerio Giuffrida9Vamilton Alvares Santarém10Graduate College in Animal Science, São Paulo Western University, Presidente Prudente, BrazilGraduate College in Animal Science, São Paulo Western University, Presidente Prudente, BrazilLaboratory of Veterinary Parasitology, Veterinary Teaching Hospital, São Paulo Western University, Presidente Prudente, BrazilLaboratory of Veterinary Parasitology, Veterinary Teaching Hospital, São Paulo Western University, Presidente Prudente, BrazilLaboratory of Pisciculture, Zootechny Teaching Aquaculture, São Paulo Western University, Presidente Prudente, BrazilLaboratory of Pisciculture, Zootechny Teaching Aquaculture, São Paulo Western University, Presidente Prudente, BrazilGraduate College of Molecular Biology, Federal University of Paraná, Curitiba, BrazilDepartment of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, United StatesDepartment of Veterinary Medicine, Federal University of Paraná, Curitiba, BrazilGraduate College in Animal Science, São Paulo Western University, Presidente Prudente, BrazilGraduate College in Animal Science, São Paulo Western University, Presidente Prudente, BrazilThe present study aimed to experimentally assess Nile tilapia as potential paratenic host of Toxocara spp. A total of 15 Nile tilapia (Oreochromis niloticus) were fed with 300 embryonated Toxocara canis eggs by oral gavage, while five others of the control group received distilled water. The fish were individually analyzed at 16, 24, 48, 72, and 240 h after inoculation. Water contamination was assessed, and tissue migration by liver, gastrointestinal tract (GIT), eyes, and central nervous system. A murine model was used as the paratenic host for egg infectivity assessment. Eggs and larvae were found in plastic tank water and fish GIT, ranging from 23 to 86% per fish. Eggs and larvae were recovered from the tank water (76.3%) and fish GIT (23.7%). The counting of eggs and larvae observed was negatively correlated with number of eggs and larvae in the water tank (rho = −0.698, p = 0.003). Shedding of embryonated eggs was first detected at 16 and up to 240 h, with significant egg and larvae yield decrease on water-shedding (p = 0.001) and in the GIT (p = 0.007). Although no T. canis larva was recovered in fish tissues, egg infectivity after fish GIT transit was experimentally confirmed by mice assessment. In conclusion, despite shedding viable embryonated eggs through the gastrointestinal tract, tilapias may not play a role as a suitable paratenic hosts for Toxocara spp., posing low risk of zoonotic transmission by fish meat consumption.https://www.frontiersin.org/articles/10.3389/fvets.2021.685911/fullenvironmental contaminationfishtoxocariasistransmissionzoonosis |
| spellingShingle | Everton André de Oliveira Yslla Fernanda Fitz Balo Merigueti Isabella Braghin Ferreira Isabele Santos Garcia Alini Soriano Pereira Rosemeire de Souza Santos Louise Bach Kmetiuk Andrea Pires dos Santos Alexander Welker Biondo Rogerio Giuffrida Vamilton Alvares Santarém The Role of Nile Tilapia (Oreochromis niloticus) in the Life Cycle of Toxocara spp. Frontiers in Veterinary Science environmental contamination fish toxocariasis transmission zoonosis |
| title | The Role of Nile Tilapia (Oreochromis niloticus) in the Life Cycle of Toxocara spp. |
| title_full | The Role of Nile Tilapia (Oreochromis niloticus) in the Life Cycle of Toxocara spp. |
| title_fullStr | The Role of Nile Tilapia (Oreochromis niloticus) in the Life Cycle of Toxocara spp. |
| title_full_unstemmed | The Role of Nile Tilapia (Oreochromis niloticus) in the Life Cycle of Toxocara spp. |
| title_short | The Role of Nile Tilapia (Oreochromis niloticus) in the Life Cycle of Toxocara spp. |
| title_sort | role of nile tilapia oreochromis niloticus in the life cycle of toxocara spp |
| topic | environmental contamination fish toxocariasis transmission zoonosis |
| url | https://www.frontiersin.org/articles/10.3389/fvets.2021.685911/full |
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