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oai:recercat.cat:20.500.12327/2572025-10-22T11:21:49Zcom_2072_4428com_2072_4427col_2072_487898

Histopathological and virological findings in emaciated pigs from Mexico: an exploratory study Alpízar, Aide Segalés, Joaquim Martínez, Simón Martínez, Atalo Socci, Guadalupe Córdova, Dionicio Fajardo, Raul Producció Animal Sanitat Animal 619 The objective of this work was to detect the presence of three main pig respiratory viral agents (porcine rubulavirus [PorPV], porcine circovirus type 2 [PCV-2], and porcine reproductive and respiratory syndrome virus [PRRSV]) in tissues of emaciated piglets from the Bajío Region (Mexico). Necropsies and histopathological studies of 37 pigs with poor body condition were performed; viruses were detected by molecular biology methods and PCV-2 was further assessed by immunohistochemistry (IHC). Histopathologically, interstitial pneumonia was observed in 25/37 (68%) of the piglets. Also, a varying degree of lymphocyte depletion in lymphoid organs was found in 14/37 (38%) animals. Through polymerase chain reaction (PCR) and/or reverse transcription polymerase chain reaction (RT-PCR), from the 37 pigs, 16 were positive for PCV-2, 18 for PRRSV and 1 for PorPV. In accordance with these results, the infection and/or co-infection with PCV-2 and PRRSV were fairly frequent findings in piglets with poor body condition in Mexico, while the infection by PorPV was apparently negligible. Wasting of post-weaning piglets is a global pig farming problem that causes great economic losses and has been associated with diverse factors: microbial agents, environmental factors, nutritional factors, and management. When the Blue Eye Disease was first reported in Mexico, it was associated with severe wasting in post-weaning piglets. This study demonstrated that this disease does not seem to play such an important role in the wasting as was previously thought. info:eu-repo/semantics/publishedVersion 2018-06-27 info:eu-repo/semantics/article Alpízar, Aide, Joaquim Segalés, Simón Martínez, Atalo Martínez, Guadalupe Socci, Dionicio Córdova, and Raul Fajardo. 2018. "Histopathological And Virological Findings In Emaciated Pigs From Mexico: An Exploratory Study". Acta Veterinaria Brno 87 (3): 213-217. University of Veterinary and Pharmaceutical Sciences. doi:10.2754/avb201887030213. 0001-7213 http://hdl.handle.net/20.500.12327/257 https://doi.org/10.2754/avb201887030213 eng Acta Veterinaria Brno Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 5 University of Veterinary and Pharmaceutical Sciences, Brno