2026-08-20T15:36:15Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/1163492025-03-18T14:45:37Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Diezma Díaz, Carlos author Ferré Pérez, Ignacio author Re, Michela Tatiana author Jiménez Meléndez, Alejandro author Tabanera De Lucio, Enrique author González Huecas, Marta author Pizarro Díaz, Manuel author Yanguas Pérez, D. author Brum, P. L. author Blanco Murcia, Francisco Javier author Ortega Mora, Luis Miguel author Álvarez García, Gema 2025-01-27T14:27:14Z 2025-01-27T14:27:14Z 2019-02-02 0304-4017 1873-2550 10.1016/j.vetpar.2019.02.001 https://hdl.handle.net/20.500.14352/116349 https://doi.org/10.1016/j.vetpar.2019.02.001 30878080 In a previous attempt, an experimental model of bovine besnoitiosis was established in calves that were intravenously inoculated with different doses of Besnoitia besnoiti tachyzoites. Despite the fact that all infected calves developed the acute stage of disease, only microscopic findings characteristic of chronic besnoitiosis were reported. In the present study, calves were inoculated by subcutaneous and intradermal routes with B. besnoiti tachyzoites with the aim of developing clinical signs and macroscopic lesions characteristic of chronic besnoitiosis. Nine 3-month-old male calves were randomly distributed into three groups of three animals each. Next, 10⁶ tachyzoites were inoculated by either the subcutaneous (G1) or intradermal route (G2). The negative control group (G3) was inoculated with PBS. Daily clinical monitoring and regular blood collection were performed. At 70 days post-infection (pi), animals were euthanized, and tissues were collected to investigate lesions and parasites. Infected animals developed mild-moderate acute besnoitiosis characterized by lymphadenopathy from four days to 47 days pi, and sporadic fever peaks were only observed in one calf from G2. However, other clinical signs and macroscopic lesions characteristic of chronic besnoitiosis were not detected. Only nine tissue samples were B. besnoiti-DNA-positive, eight of which belonged to reproductive and respiratory tracts tissues from G1. Finally, the kinetics of the immune responses were similar in both infected groups. However, delayed and lower cellular and humoral immune responses were observed in G1 followed by G2 and were compared with intravenously inoculated calves. The differences observed among the three inoculation routes could be due to different effector mechanisms of the host early innate immune response against B. besnoiti. Accordingly, the inoculation route of B. besnoiti tachyzoites does not significantly influence the clinical outcome of the infection in calves. Thus, a further refinement of this experimental model of bovine besnoitiosis is needed to reproduce macroscopic lesions characteristic of chronic stage disease. eng Attribution-NonCommercial-NoDerivatives 4.0 International The route of Besnoitia besnoiti tachyzoites inoculation does not influence the clinical outcome of the infection in calves journal article 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URL https://docta.ucm.es/bitstreams/cb7c7e16-3bd0-447e-af6a-b674dc3353f6/download File MD5 580ebb88ba66f94a4fb7874acf51b812 578272 application/pdf The route of besnoitia.pdf URL https://docta.ucm.es/bitstreams/6ff9b38b-1044-4434-a42b-9d0fdb70e049/download File MD5 2e6fb51581af5d1b2bb244b760e7443a 33857 text/plain The route of besnoitia.pdf.txt