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Title: Assessment of lung disease in finishing pigs at slaughter: Pulmonary lesions and implications on productivity parameters
Authors: Paz Sanchez, Yania 
Herráez Thomas, Pedro Manuel 
Quesada Canales, Ildefonso Óscar 
Poveda Turrado, Carlos Guillermo 
Diaz Delgado, Josue 
Quintana Montesdeoca, María Del Pino 
Stefanova, Elena Plamenova 
Andrada Borzollino, Marisa Ana 
UNESCO Clasification: 310911 Virología
310907 Patología
Keywords: Lung Lesions
Mycoplasma Hyopneumoniae
Porcine Circovirus Type 2
Porcine Reproductive And Respiratory Syndrome Virus
Serology, et al
Issue Date: 2021
Journal: Animals 
Abstract: Swine respiratory disease is associated with productive losses. We evaluated the prevalence of lung lesions with an emphasis on Mycoplasma hyopneumoniae (Mh), porcine circovirus type 2 (PCV2) and porcine reproductive and respiratory syndrome virus (PRRSV), as well as the impact on productive parameters in 108 finishing pigs at slaughter. Pathologic, immunohistochemical (IHC) and serologic analyses were performed. Pneumonic processes were observed in 73.1% of the animals. They mainly consisted of cranioventral bronchopneumonia (CBP) (46.3%) and pleuritis (17.6%). Microscopically, bronchointerstitial pneumonia (67.4%) was common and was occasionally combined (27.9%) with interstitial pneumonia (IP). Mh and PCV2-antigens were detected in bronchointerstitial pneumonia (70.7%) and IP cases (33.3%). There were low titers against Mh (18%) and high titers against PRRSV (100%) and PCV2 (65%). Animals with CBP remained at the farm longer; those with >10% of lung parenchyma involvement were sent later (208.8 days old) and had a lower average carcass weight (74.1 kg) and a lower daily weight gain (500.8 gr/day) compared with animals without lesions (567.2 gr/day, 77.7 kg, 200.8 days old). We suggest that animals that do not reach the weight at slaughter should be sent to slaughter regardless to avoid further negative impacts of respiratory disease in productive parameters.
DOI: 10.3390/ani11123604
Source: Animals [EISSN 2076-2615], v. 11 (12), (Diciembre 2021)
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