Abstract
Fasciola gigantica is a widespread parasite that causes neglected disease in livestock worldwide. Its high transmissibility and dispersion are attributed to its ability to infect intermediate snail hosts and adapt to various mammalian definitive hosts. This study investigated the variation and population dynamics of F. gigantica in cattle, sheep, and goats from three states in Sudan. Mitochondrial cytochrome c oxidase subunit I (COI) and NADH dehydrogenase subunit 1 (ND1) genes were sequenced successfully to examine intra and interspecific differences. ND1 exhibited higher diversity than COI, with 15 haplotypes and 10 haplotypes, respectively. Both genes had high haplotype diversity but low nucleotide diversity, with 21 and 11 polymorphic sites for ND1 and COI, respectively. Mismatch distribution analysis and neutrality tests revealed that F. gigantica from different host species was in a state of population expansion. Maximum likelihood phylogenetic trees and median networks revealed that F. gigantica in Sudan and other African countries had host-specific and country-specific lineages for both genes. The study also indicated that F. gigantica-infected small ruminants were evolutionarily distant, suggesting deep and historical interspecies adaptation.
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Acknowledgements
Special thanks are extended to the Molecular Genetics and Genomics Laboratory at College of Veterinary Medicine at King Faisal University. Additionally, we express our gratitude to Dr. Elfatih Mohamed for crafting the map featured in Figure S1.
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We acknowledge the partial financial support from Japan Society for the Promotion of Science (JSPS) KAKENHI [22H02505].
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BS and RN designed, conceptualized research, and supervised the work. KI contributed samples. BS, EC, YO, NN, and RN carried out the experiments. BS and NSM analyzed data. BS, MA, and RN acquired funding. BS, NSM, SA, and FA contributed to the interpretation of the results. BS and RN administrated project. BS, NSM, and SA wrote the original draft. BS, NSM. SA, AA, and RN are responsible for writing, reviewing, and editing. All authors provided critical feedback and helped shape the research, analysis, and manuscript.
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The study protocol was reviewed and approved by Central Veterinary Research Laboratory, Khartoum, Sudan. We confirm that the study is conducted in accordance with ARRIVE guidelines (https://arriveguidelines.org) and with the guidelines for sampling domestic animals in Sudan, ensuring ethical compliance in the collection and use of the samples.
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Ibrahim, K., Chatanga, E., Mohamed, N.S. et al. Intra- and interspecies variation and population dynamics of Fasciola gigantica among ruminants in Sudan. Parasitol Res 123, 210 (2024). https://doi.org/10.1007/s00436-024-08201-5
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DOI: https://doi.org/10.1007/s00436-024-08201-5