Abstract

Liver fluke infection, caused by the trematode Fasciola hepatica, is a parasitic zoonotic disease affecting various mammals, including humans, and has significant implications for public, animal, and ecosystem health. This study provides the first genetic characterization of F. hepatica in Chile, focusing on the complete mitochondrial gene cox1. Samples were collected from two different host species: cattle and horses. Our findings revealed that 70 % of detected haplotypes were found in either cattle or horses, which coincides with their geographical origin. Interestingly, the use of full-length sequences resulted in the identification of 80 % unique sequences, whereas this reduced to 45 % when analyzing the traditionally used short sequences. This underestimation of genetic diversity suggests that broader sequencing efforts might be essential for a more accurate understanding of F. hepatica genetic landscape. This research underscores the importance of understanding the genetic variability in parasites to improve strategies for disease control and treatment.

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