Assessment of Lung Disease in Finishing Pigs at Slaughter: Pulmonary Lesions and Implications on Productivity Parameters

被引：20

作者：

Paz-Sanchez, Yania ^{[1
]}

Herraez, Pedro ^{[1
,2
]}

Quesada-Canales, Oscar ^{[1
]}

Poveda, Carlos G. ^{[3
]}

Diaz-Delgado, Josue ^{[1
,4
]}

Quintana-Montesdeoca, Maria del Pino ^{[5
]}

Plamenova Stefanova, Elena ^{[1
]}

Andrada, Marisa ^{[1
,2
]}

机构：

[1] Univ Las Palmas Gran Canaria, Vet Histol & Pathol, Inst Anim Hlth & Food Safety IUSA, Vet Sch, Las Palmas Gran Canaria 35416, Spain

[2] Univ Las Palmas Gran Canaria, Vet Sch, Dept Comparat Pathol, Las Palmas Gran Canaria 35416, Spain

[3] Univ Las Palmas Gran Canaria, Vet Sch, Inst Anim Hlth & Food Safety IUSA, Epidemiol & Prevent Med, Las Palmas Gran Canaria 35416, Spain

[4] Texas A&M Vet Med Diagnost Lab, Pathol Div, College Stn, TX 77843 USA

[5] Univ Las Palmas Gran Canaria, Dept Math, Las Palmas Gran Canaria 35017, Spain

来源：

ANIMALS | 2021年 / 11卷 / 12期

关键词：

lung lesions; Mycoplasma hyopneumoniae; porcine circovirus type 2; porcine reproductive and respiratory syndrome virus; serology; swine pathology; RESPIRATORY SYNDROME VIRUS; PORCINE CIRCOVIRUS TYPE-2; MYCOPLASMA-HYOPNEUMONIAE INFECTION; MATERNAL ANTIBODIES; ENZOOTIC PNEUMONIA; MEAT QUALITY; SWINE HERDS; PRRS VIRUS; ASSOCIATION; VACCINATION;

D O I：

10.3390/ani11123604

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Simple Summary Examination of lung lesions at slaughterhouses provides important information regarding swine respiratory disease presence in farms worldwide. This study evaluated pulmonary lesions in pigs at slaughter and assessed their effect on productive parameters. We observed a high occurrence (73.1%) of lung lesions in a cohort of 108 pigs; these lesions were associated with primary bacterial disease or a combination of bacterial and viral pathogens. The animals with more severe lesions had lower weight gain, remained at the farm longer, and were exposed to reinfection. Through laboratory tests, we demonstrated coinfections between Mycoplasma hyopneumoniae, porcine circovirus type 2, and porcine reproductive and respiratory syndrome virus in affected lungs. We suggest that pigs that do not reach the desired weight at slaughter age should be sent to slaughter regardless, thus avoiding economic losses due to suboptimal productive parameters and aggravated respiratory disease by reinfection. 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.

引用

页数：15

共 63 条

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