RT Journal Article T1 A Partially Protective Vaccine for Fasciola hepatica Induced Degeneration of Adult Flukes Associated to a Severe Granulomatous Reaction in Sheep A1 Molina-Hernández, Verónica A1 Ruiz-Campillo, María Teresa A1 Martínez-Moreno, Francisco Javier A1 Buffoni, Leandro A1 Martinez Moreno, Álvaro A1 Zafra, Rafael A1 Bautista, María José A1 Escamilla-Sánchez, Alejandro A1 Pérez-Caballero, Raúl A1 Pérez, José K1 Histología AB Fasciolosis is a parasitic disease of livestock causing important economic losses worldwide and it is also a zoonosis. Current therapy relies on the use of anthelmintic drugs, which is no longer sustainable due to the increase of anthelmintic resistance and the risk of drug residues in food. A deep understanding of the host-parasite interaction is required to develop protective vaccines for the control of fasciolosis. The aim of the present study is to evaluate the hepatic lesions in sheep vaccinated with a partly protective vaccine for F. hepatica, a non-protective vaccine and an infected control group. The protective vaccine showed less severe hepatic lesions than the infected control group. In addition, in the protective vaccine group dead flukes surrounded by a severe granulomatous inflammation were observed, which taken together with the lower fluke burden, suggests that the host response induced by the partially protective vaccine may have been involved in the death of adult flukes of F. hepatica. This is the first study reporting the presence of degenerated flukes associated to a severe granulomatous inflammation in bile ducts in a vaccine trial, a finding that would be useful for improving vaccine efficacy in future trials. PB MDPI YR 2021 FD 2021-09-30 LK https://hdl.handle.net/10630/36153 UL https://hdl.handle.net/10630/36153 LA eng NO Molina-Hernández, V.; Ruiz-Campillo, M.T.; Martínez-Moreno, F.J.; Buffoni, L.; Martínez-Moreno, Á.; Zafra, R.; Bautista, M.J.; Escamilla, A.; Pérez-Caballero, R.; Pérez, J. A Partially Protective Vaccine for Fasciola hepatica Induced Degeneration of Adult Flukes Associated to a Severe Granulomatous Reaction in Sheep. Animals 2021, 11, 2869. https://doi.org/10.3390/ani11102869 NO This research was funded by the EU grant H2020-SFS-2014-2-635408-PARAGONE and MINECO grant PID2019-108782RB-C21. VMH was supported by the “Juan de la Cierva-Incorporacion” contract (IJCI-2017-31366) of the Spanish Ministry of Science, Innovation and Universities. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 19 ene 2026