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Potential Hybridization of Fasciola hepatica and F. gigantica in Africa—A Scoping Review
The occurrence of Fasciola gigantica and F. hepatica in Africa is well documented; however, unlike in Asia, there is a paucity of information on the existence of hybrids or parthenogenetic species on the continent. Nonetheless, these hybrid species may have beneficial characteristics, such as increa...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695073/ https://www.ncbi.nlm.nih.gov/pubmed/36365054 http://dx.doi.org/10.3390/pathogens11111303 |
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author | Nukeri, Sophy Malatji, Mokgadi Pulane Sengupta, Mita Eva Vennervald, Birgitte Jyding Stensgaard, Anna-Sofie Chaisi, Mamohale Mukaratirwa, Samson |
author_facet | Nukeri, Sophy Malatji, Mokgadi Pulane Sengupta, Mita Eva Vennervald, Birgitte Jyding Stensgaard, Anna-Sofie Chaisi, Mamohale Mukaratirwa, Samson |
author_sort | Nukeri, Sophy |
collection | PubMed |
description | The occurrence of Fasciola gigantica and F. hepatica in Africa is well documented; however, unlike in Asia, there is a paucity of information on the existence of hybrids or parthenogenetic species on the continent. Nonetheless, these hybrid species may have beneficial characteristics, such as increased host range and pathogenicity. This study provides evidence of the potential existence of Fasciola hybrids in Africa. A literature search of articles published between 1980 and 2022 was conducted in PubMed, Google Scholar, and Science Direct using a combination of search terms and Boolean operators. Fasciola species were documented in 26 African countries with F. hepatica being restricted to 12 countries, whilst F. gigantica occurred in 24 countries, identified based on morphological features of adult Fasciola specimens or eggs and molecular techniques. The co-occurrence of both species was reported in 11 countries. However, the occurrence of potential Fasciola hybrids was only confirmed in Egypt and Chad but is suspected in South Africa and Zimbabwe. These were identified based on liver fluke morphometrics, assessment of the sperms in the seminal vesicle, and molecular techniques. The occurrence of intermediate host snails Galba truncatula and Radix natalensis was reported in Ethiopia, Egypt, South Africa, Tanzania, and Uganda, where F. hepatica and F. gigantica co-occurrences were reported. The invasive Pseudosuccinea columella snails naturally infected with F. gigantica were documented in South Africa and Egypt. In Zimbabwe, P. columella was infected with a presumed parthenogenetic Fasciola. This suggests that the invasive species might also be contributing to the overlapping distributions of the two Fasciola species since it can transmit both species. Notwithstanding the limited studies in Africa, the potential existence of Fasciola hybrids in Africa is real and might mimic scenarios in Asia, where parthenogenetic Fasciola exist in most Asian countries. In South Africa, aspermic F. hepatica and Fasciola sp. have been reported already, and Fasciola hybrids have been reported? in Chad and Egypt. Thus, the authors recommend future surveys using molecular markers recommended to identify Fasciola spp. and their snail intermediate hosts to demarcate areas of overlapping distribution where Fasciola hybrids and/or parthenogenetic Fasciola may occur. Further studies should also be conducted to determine the presence and role of P. columella in the transmission of Fasciola spp. in these geographical overlaps to help prevent parasite spillbacks. |
format | Online Article Text |
id | pubmed-9695073 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96950732022-11-26 Potential Hybridization of Fasciola hepatica and F. gigantica in Africa—A Scoping Review Nukeri, Sophy Malatji, Mokgadi Pulane Sengupta, Mita Eva Vennervald, Birgitte Jyding Stensgaard, Anna-Sofie Chaisi, Mamohale Mukaratirwa, Samson Pathogens Review The occurrence of Fasciola gigantica and F. hepatica in Africa is well documented; however, unlike in Asia, there is a paucity of information on the existence of hybrids or parthenogenetic species on the continent. Nonetheless, these hybrid species may have beneficial characteristics, such as increased host range and pathogenicity. This study provides evidence of the potential existence of Fasciola hybrids in Africa. A literature search of articles published between 1980 and 2022 was conducted in PubMed, Google Scholar, and Science Direct using a combination of search terms and Boolean operators. Fasciola species were documented in 26 African countries with F. hepatica being restricted to 12 countries, whilst F. gigantica occurred in 24 countries, identified based on morphological features of adult Fasciola specimens or eggs and molecular techniques. The co-occurrence of both species was reported in 11 countries. However, the occurrence of potential Fasciola hybrids was only confirmed in Egypt and Chad but is suspected in South Africa and Zimbabwe. These were identified based on liver fluke morphometrics, assessment of the sperms in the seminal vesicle, and molecular techniques. The occurrence of intermediate host snails Galba truncatula and Radix natalensis was reported in Ethiopia, Egypt, South Africa, Tanzania, and Uganda, where F. hepatica and F. gigantica co-occurrences were reported. The invasive Pseudosuccinea columella snails naturally infected with F. gigantica were documented in South Africa and Egypt. In Zimbabwe, P. columella was infected with a presumed parthenogenetic Fasciola. This suggests that the invasive species might also be contributing to the overlapping distributions of the two Fasciola species since it can transmit both species. Notwithstanding the limited studies in Africa, the potential existence of Fasciola hybrids in Africa is real and might mimic scenarios in Asia, where parthenogenetic Fasciola exist in most Asian countries. In South Africa, aspermic F. hepatica and Fasciola sp. have been reported already, and Fasciola hybrids have been reported? in Chad and Egypt. Thus, the authors recommend future surveys using molecular markers recommended to identify Fasciola spp. and their snail intermediate hosts to demarcate areas of overlapping distribution where Fasciola hybrids and/or parthenogenetic Fasciola may occur. Further studies should also be conducted to determine the presence and role of P. columella in the transmission of Fasciola spp. in these geographical overlaps to help prevent parasite spillbacks. MDPI 2022-11-06 /pmc/articles/PMC9695073/ /pubmed/36365054 http://dx.doi.org/10.3390/pathogens11111303 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Review Nukeri, Sophy Malatji, Mokgadi Pulane Sengupta, Mita Eva Vennervald, Birgitte Jyding Stensgaard, Anna-Sofie Chaisi, Mamohale Mukaratirwa, Samson Potential Hybridization of Fasciola hepatica and F. gigantica in Africa—A Scoping Review |
title | Potential Hybridization of Fasciola hepatica and F. gigantica in Africa—A Scoping Review |
title_full | Potential Hybridization of Fasciola hepatica and F. gigantica in Africa—A Scoping Review |
title_fullStr | Potential Hybridization of Fasciola hepatica and F. gigantica in Africa—A Scoping Review |
title_full_unstemmed | Potential Hybridization of Fasciola hepatica and F. gigantica in Africa—A Scoping Review |
title_short | Potential Hybridization of Fasciola hepatica and F. gigantica in Africa—A Scoping Review |
title_sort | potential hybridization of fasciola hepatica and f. gigantica in africa—a scoping review |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695073/ https://www.ncbi.nlm.nih.gov/pubmed/36365054 http://dx.doi.org/10.3390/pathogens11111303 |
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