Trematode genetic patterns at host individual and population scales provide insights about infection mechanisms
Type | Article | ||||||||||||||||
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Date | 2023-11 | ||||||||||||||||
Language | English | ||||||||||||||||
Author(s) | Correia Simão1, 2, 3, 4, Fernández-Boo Sergio2, Magalhães Luísa1, de Montaudouin Xavier5, Daffe Guillemine6, Poulin Robert4, Vera Manuel3 | ||||||||||||||||
Affiliation(s) | 1 : CESAM, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal 2 : Aquatic and Animal Health group, CIIMAR, University of Porto, 4450-208 Matosinhos, Portugal 3 : Department of Zoology, Genetics and Physical Anthropology, University of Santiago de Compostela, 27002 Lugo, Spain 4 : Department of Zoology, University of Otago, 9054 Dunedin, New Zealand 5 : CNRS, UMR EPOC, Station Marine, University of Bordeaux, F-33120 Arcachon, France 6 : Université de Bordeaux, CNRS, Observatoire Aquitain des Sciences de l’Univers, UAR 2567 POREA, F-33615, Pessac, France |
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Source | Parasitology (0031-1820) (Cambridge University Press (CUP)), 2023-11 , Vol. 150 , N. 13 , P. 1207-1220 | ||||||||||||||||
DOI | 10.1017/S0031182023000987 | ||||||||||||||||
Keyword(s) | Bucephalus minimus, Cerastoderma edule, clonal diversity, COI, host-parasite interactions, parasite, population genetics | ||||||||||||||||
Abstract | Multiple parasites can infect a single host, creating a dynamic environment where each parasite must compete over host resources. Such interactions can cause greater harm to the host than single infections and can also have negative consequences for the parasites themselves. In their first intermediate hosts, trematodes multiply asexually and can eventually reach up to 20% of the host’s biomass. In most species, it is unclear whether this biomass results from a single infection or co-infection by two or more infective stages (miracidia), the latter being more likely a priori in areas where prevalence of infection is high. Using as model system the trematode Bucephalus minimus and its first intermediate host cockles, we examined the genetic diversity of the cytochrome c oxidase subunit I (COI) region in B. minimus from three distinct geographical areas and performed a phylogeographic study of B. minimus populations along the Northeast Atlantic coast. Within localities, the high genetic variability found across trematodes infecting different individual cockles, compared to the absence of variability within the same host, suggests that infections could be generally originating from a single miracidium. On a large spatial scale, we uncovered significant population structure of B. minimus, specifically between the north and south of Bay of Biscay. Although other explanations are possible, we suggest this pattern may be driven by the population structure of the final host. |
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