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Pessoa J, McAloon C, Boyle L, García Manzanilla E, Norton T, Rodrigues da Costa M. Value of simplified lung lesions scoring systems to inform future codes for routine meat inspection in pigs. Porcine Health Manag 2023; 9:31. [PMID: 37391833 DOI: 10.1186/s40813-023-00324-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 06/13/2023] [Indexed: 07/02/2023] Open
Abstract
BACKGROUND Across the European Union (EU), efforts are being made to achieve modernisation and harmonisation of meat inspection (MI) code systems. Lung lesions were prioritised as important animal based measures at slaughter, but existing standardized protocols are difficult to implement for routine MI. This study aimed to compare the informative value and feasibility of simplified lung lesion scoring systems to inform future codes for routine post mortem MI. RESULTS Data on lung lesions in finisher pigs were collected at slaughter targeting 83 Irish pig farms, with 201 batches assessed, comprising 31,655 pairs of lungs. Lungs were scored for cranioventral pulmonary consolidations (CVPC) and pleurisy lesions using detailed scoring systems, which were considered the gold standard. Using the data collected, scenarios for possible simplified scoring systems to record CVPC (n = 4) and pleurisy (n = 4) lesions were defined. The measurable outcomes were the prevalence and (if possible) severity scoring at batch level for CVPC and pleurisy. An arbitrary threshold was set to the upper quartile (i.e., the top 25% of batches with high prevalence/severity of CVPC or pleurisy, n = 50). Each pair of measurable outcomes was compared by calculating Spearman rank correlations and assessing if batches above the threshold for one measurable outcome were also above it for their pairwise comparison. All scenarios showed perfect agreement (k = 1) when compared among themselves and the gold standard for the prevalence of CVPC. The agreement among severity outcomes and the gold standard showed moderate to perfect agreement (k = [0.66, 1]). The changes in ranking were negligible for all measurable outcomes of pleurisy for scenarios 1, 2 and 3 when compared with the gold standard (rs ≥ 0.98), but these changes amounted to 50% for scenario 4. CONCLUSIONS The best simplified CVPC scoring system is to simply count the number of lung lobes affected excluding the intermediate lobe, which provides the best trade-off between value of information and feasibility, by incorporating information on CVPC prevalence and severity. While for pleurisy evaluation, scenario 3 is recommended. This simplified scoring system provides information on the prevalence of cranial and moderate and severe dorsocaudal pleurisy. Further validation of the scoring systems at slaughter and by private veterinarians and farmers is needed.
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Affiliation(s)
- Joana Pessoa
- Pig Development Department, Teagasc Animal and Grassland Research and Innovation Centre, Moorepark, Ireland.
- Section of Herd Health and Animal Husbandry, School of Veterinary Medicine, University College Dublin, Belfield, Ireland.
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - Conor McAloon
- Section of Herd Health and Animal Husbandry, School of Veterinary Medicine, University College Dublin, Belfield, Ireland
| | - Laura Boyle
- Pig Development Department, Teagasc Animal and Grassland Research and Innovation Centre, Moorepark, Ireland
| | - Edgar García Manzanilla
- Pig Development Department, Teagasc Animal and Grassland Research and Innovation Centre, Moorepark, Ireland
- Section of Herd Health and Animal Husbandry, School of Veterinary Medicine, University College Dublin, Belfield, Ireland
| | - Tomas Norton
- M3-BIORES-Measure, Model and Manage Bioresponses, KU Leuven, Leuven, Belgium
| | - Maria Rodrigues da Costa
- Pig Development Department, Teagasc Animal and Grassland Research and Innovation Centre, Moorepark, Ireland
- Section of Herd Health and Animal Husbandry, School of Veterinary Medicine, University College Dublin, Belfield, Ireland
- Epidemiology Research Unit, Department of Veterinary and Animal Science, Northern Faculty, Scotland's Rural College (SRUC), An Lòchran, 10 Inverness Campus, Inverness, IV2 5NA, Scotland, UK
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A cross-sectional survey on respiratory disease in a cohort of Irish pig farms. Ir Vet J 2020; 73:24. [PMID: 33319705 PMCID: PMC7680599 DOI: 10.1186/s13620-020-00176-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 11/03/2020] [Indexed: 11/10/2022] Open
Abstract
Background Respiratory disease is one of the most important factors impacting pig production worldwide. There is no available information on the prevalence of key pathogens implicated in Irish pig production. The objective of this study was to describe the prevalence of pleurisy, pneumonia, lung abscesses, pericarditis and liver milk spots in finisher pigs of a cohort of Irish pig farms, and to describe the seroprevalence of: influenza A virus (IAV), porcine reproductive and respiratory syndrome virus (PRRSv), Mycoplasma hyopneumoniae (Mhyo) and Actinobacillus pleuropneumoniae (APP). Results In brief, 56 farrow-to-finish farms (29% of the Irish breeding herd) were enrolled in the study in 2017. Data on lungs, heart, and liver lesions were assessed for each farm at slaughter. An average of 417 (range 129–1154) plucks per farm were assessed for pleurisy, pneumonia, lung abscesses, pericarditis, and liver milk spots. Blood samples from 32 finisher pigs were collected at slaughter for each farm. The observed prevalence of pleurisy and pneumonia was one of the lowest reported in similar studies in Europe (13 and 11% estimated average within farm, respectively). Pleurisy lesions were mostly moderate and severe. Pneumonia lesions affected a low level of lung surface (5.8%). Prevalence of pericarditis was mid-high (8%) and the prevalence of liver milk spots was high, with an average of 29% of the livers affected. For serology, 78.6% of the farms were positive for IAV, 50% were positive for PRRSv, 71.4% were positive for Mhyo, and 98.2% were positive for APP. Influenza virus was the main pathogen associated with pleurisy (P < 0.001) and Mhyo was the main pathogen associated with pneumonia (P < 0.001) and pericarditis (P = 0.024). Conclusions Farms affected with pleurisy had moderate to severe lesions. Farms affected with pneumonia had mild lesions, which could be the effect of the generalised use of Mhyo vaccination in piglets. The seroprevalence of IAV, PRRSv, Mhyo and APP in the present study sample is similar to or lower than in other European countries. Further research on the PRRSv and APP strains circulating in Ireland is necessary to support the design of national or regional control plans.
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Rodrigues da Costa M, Fitzgerald RM, Manzanilla EG, O’Shea H, Moriarty J, McElroy MC, Leonard FC. A cross-sectional survey on respiratory disease in a cohort of Irish pig farms. Ir Vet J 2020. [PMID: 33319705 PMCID: PMC7680599 DOI: 10.1186/s13620-020-00176-w+] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Respiratory disease is one of the most important factors impacting pig production worldwide. There is no available information on the prevalence of key pathogens implicated in Irish pig production. The objective of this study was to describe the prevalence of pleurisy, pneumonia, lung abscesses, pericarditis and liver milk spots in finisher pigs of a cohort of Irish pig farms, and to describe the seroprevalence of: influenza A virus (IAV), porcine reproductive and respiratory syndrome virus (PRRSv), Mycoplasma hyopneumoniae (Mhyo) and Actinobacillus pleuropneumoniae (APP). RESULTS In brief, 56 farrow-to-finish farms (29% of the Irish breeding herd) were enrolled in the study in 2017. Data on lungs, heart, and liver lesions were assessed for each farm at slaughter. An average of 417 (range 129-1154) plucks per farm were assessed for pleurisy, pneumonia, lung abscesses, pericarditis, and liver milk spots. Blood samples from 32 finisher pigs were collected at slaughter for each farm. The observed prevalence of pleurisy and pneumonia was one of the lowest reported in similar studies in Europe (13 and 11% estimated average within farm, respectively). Pleurisy lesions were mostly moderate and severe. Pneumonia lesions affected a low level of lung surface (5.8%). Prevalence of pericarditis was mid-high (8%) and the prevalence of liver milk spots was high, with an average of 29% of the livers affected. For serology, 78.6% of the farms were positive for IAV, 50% were positive for PRRSv, 71.4% were positive for Mhyo, and 98.2% were positive for APP. Influenza virus was the main pathogen associated with pleurisy (P < 0.001) and Mhyo was the main pathogen associated with pneumonia (P < 0.001) and pericarditis (P = 0.024). CONCLUSIONS Farms affected with pleurisy had moderate to severe lesions. Farms affected with pneumonia had mild lesions, which could be the effect of the generalised use of Mhyo vaccination in piglets. The seroprevalence of IAV, PRRSv, Mhyo and APP in the present study sample is similar to or lower than in other European countries. Further research on the PRRSv and APP strains circulating in Ireland is necessary to support the design of national or regional control plans.
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Affiliation(s)
- Maria Rodrigues da Costa
- Pig Development Department, Teagasc - Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy, P61 C996 Co. Cork, Ireland ,grid.7080.fDepartament de Ciencia Animal i dels Aliments, Facultat de Veterinaria, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain ,grid.7886.10000 0001 0768 2743School of Veterinary Medicine, University College Dublin, Dublin 4, D04 V1W8 Belfield, Ireland ,grid.426884.40000 0001 0170 6644Present address: Epidemiology Research Unit, Department of Veterinary and Animal Science, Northern Faculty, Scotland’s Rural College (SRUC), An Lòchran, 10 Inverness Campus, IV2 5NA Inverness, Scotland, UK
| | - Rose Mary Fitzgerald
- grid.47244.310000 0001 0693 825XBio-Explore, Department of Biological Sciences, Cork Institute of Technology, Rossa Avenue, Bishopstown, T12 P928 Cork, Ireland
| | - Edgar Garcia Manzanilla
- Pig Development Department, Teagasc - Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy, P61 C996 Co. Cork, Ireland ,grid.7886.10000 0001 0768 2743School of Veterinary Medicine, University College Dublin, Dublin 4, D04 V1W8 Belfield, Ireland
| | - Helen O’Shea
- grid.47244.310000 0001 0693 825XBio-Explore, Department of Biological Sciences, Cork Institute of Technology, Rossa Avenue, Bishopstown, T12 P928 Cork, Ireland
| | - John Moriarty
- Central Veterinary Research laboratory, Department of Agriculture, Food & Marine Laboratories, Celbridge W23VW2C Co. Kildare, Ireland
| | - Máire C. McElroy
- Central Veterinary Research laboratory, Department of Agriculture, Food & Marine Laboratories, Celbridge W23VW2C Co. Kildare, Ireland
| | - Finola Catherine Leonard
- grid.7886.10000 0001 0768 2743School of Veterinary Medicine, University College Dublin, Dublin 4, D04 V1W8 Belfield, Ireland
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Baraldi TG, Cruz NRN, Pereira DA, Galdeano JVB, Gatto IRH, Silva AFD, Panzardi A, Linhares DCL, Mathias LA, de Oliveira LG. Antibodies against Actinobacillus pleuropneumoniae, Mycoplasma hyopneumoniae and influenza virus and their relationships with risk factors, clinical signs and lung lesions in pig farms with one-site production systems in Brazil. Prev Vet Med 2019; 171:104748. [PMID: 31470290 DOI: 10.1016/j.prevetmed.2019.104748] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 08/04/2019] [Accepted: 08/18/2019] [Indexed: 10/26/2022]
Abstract
A study was conducted on 21 pig herds using one-site production system in the southeast region of Brazil to assess the relationships among serological results for primary pathogens involved in respiratory diseases (Actinobacillus pleuropneumoniae, App; Mycoplasma hyopneumoniae, Mhyo; and swine influenza virus, SIV), cough index, pneumonia index, pleuritis and herd characteristics. The prevalence of antibodies against Mhyo and SIV increased throughout the raising phases, with the highest prevalence in slaughtered pigs (> 40%), while pigs in 65% (14/21) of nurseries demonstrated marked seroprevalence of App that decreased until the day of slaughter. Pleuritis and pulmonary consolidations were recorded in 9.0 and 72.4%, respectively, of the 908 evaluated lungs. Histopathological analysis of the lung lesions revealed suppurative bronchopneumonia in almost half of the lungs (48.9%). Regression analyses were conducted to identify risk factors associated with the cough index; pleuritis; pulmonary consolidation; and App, Mhyo and SIV serological results. All-in-all-out management in nursery buildings reduced the seroprevalence of Mhyo in herds. App seroprevalence was associated with pleuritis, and the presence of cough episodes in growing pigs was associated with SIV seropositivity in nursery pigs.
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Affiliation(s)
- T G Baraldi
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil
| | - N R N Cruz
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil
| | - D A Pereira
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil
| | - J V B Galdeano
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil
| | - I R H Gatto
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil
| | | | | | - D C L Linhares
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States
| | - L A Mathias
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil
| | - L G de Oliveira
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil.
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Cvjetković V, Sipos S, Szabó I, Sipos W. Clinical efficacy of two vaccination strategies against Mycoplasma hyopneumoniae in a pig herd suffering from respiratory disease. Porcine Health Manag 2018; 4:19. [PMID: 30083374 PMCID: PMC6069710 DOI: 10.1186/s40813-018-0092-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 06/18/2018] [Indexed: 12/14/2022] Open
Abstract
Background A randomised field trial was conducted on an Austrian farrow-to-finish farm for one year to compare the efficacy of two commercial Mycoplasma hyopneumoniae vaccines. 585 piglets either received the one-shot formulation in group 1 (Hyogen®, 23.9 days of age) or a two-shot vaccine (Stellamune® Mycoplasma, 4.3 and 24.0 days of age) in group 2. Assessment of vaccine efficacy was evaluated by regression analyses through cough monitoring from nursery to slaughter, average daily weight gain from inclusion to slaughter, antibiotic treatment rate (ATR), mortality rate, and lung lesion scoring at slaughter. Results In general, coughing was more frequent during late nursery and finishing. No significant differences were found in the coughing index (0.02 vs 0.03) and mean average daily weight gain (560 vs 550 g) between the two groups. ATR was higher in group 2 (3.8 vs 9.6%). At the slaughterhouse check, significant differences in the prevalence of bronchopneumonia (62.9 vs 71.2%) could be found. Extension of lung lesions was also significantly lower in group 1 in terms of enzootic pneumonia (EP) values (p = 0.000, z = − 4.269). There were no significant differences in the rate of scarred lungs (20.0 vs 24.0%) or those affected by dorsocaudal pleurisy (36.8 vs 34.3%). Conclusions This trial demonstrated that Hyogen® was superior to Stellamune® Mycoplasma in reducing (I) the prevalence of bronchopneumonic lungs and those affected by cranioventral pleurisy, (II) the extension and severity of EP-like lung lesions, and (III) the rate of antibiotically treated animals against respiratory disease.
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Affiliation(s)
| | - Sabine Sipos
- Veterinary Practice Schwertfegen, Schwertfegen 2, 3040, Neulengbach, Austria
| | - Imre Szabó
- Ceva-Phylaxia, Co., Szállás u.5, Budapest, 1107 Hungary
| | - Wolfgang Sipos
- 4Clinic for Swine, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria
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Garcia-Morante B, Segalés J, Fraile L, Llardén G, Coll T, Sibila M. Potential use of local and systemic humoral immune response parameters to forecast Mycoplasma hyopneumoniae associated lung lesions. PLoS One 2017; 12:e0175034. [PMID: 28380065 PMCID: PMC5381809 DOI: 10.1371/journal.pone.0175034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 03/20/2017] [Indexed: 01/17/2023] Open
Abstract
Immunopathological events are key for the development of enzootic pneumonia (EP), which is macroscopically observed as cranioventral pulmonary consolidation (CVPC). This study aimed to investigate the putative association between the humoral immune response against Mycoplasma hyopneumoniae (M. hyopneumoniae) and prevalence and extension of CVPC in 1) experimentally infected pigs, 2) slaughtered pigs and 3) sequentially necropsied pigs in a longitudinal study. CVPC was scored by means of the European Pharmacopoeia recommended methodology. Specific IgG, IgG1 and IgG2 antibodies were assessed in serum. In addition, mucosal IgG and IgA antibodies were analyzed in broncho-alveolar lavage fluid (BALF) from experimentally challenged pigs. The systemic humoral immune response in experimentally infected pigs was delayed in onset whereas humoral respiratory mucosal immune response appeared more rapidly but declined earlier. Although low, BALF IgG antibodies showed the highest correlation with CVPC scores (r = 0.49, p<0.05). In slaughter-aged pigs, both percentage of lungs with CVPC and mean lung lesion score were significantly higher in M. hyopneumoniae seropositive farms compared to the seronegative ones (p<0.001). Similarly, seropositive sequentially necropsied pigs showed more severe CVPC than seronegative ones. Overall, mean serological values might help to forecast prevalence and severity of EP-like lung lesions using a population based approach. Remarkably, the specific systemic humoral immune response was found to be predominated by the IgG2 subclass, suggesting a dominant Th1-mediated immune response to M. hyopneumoniae.
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Affiliation(s)
- Beatriz Garcia-Morante
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
- Boehringer Ingelheim España S.A., Sant Cugat del Vallès, Spain
| | - Joaquim Segalés
- UAB, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
- Departament de Sanitat i Anatomia Animals, Facultat de Veterinària, Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Lorenzo Fraile
- Departament de Ciència Animal, ETSEA, Universitat de Lleida, Lleida, Spain
| | - Gemma Llardén
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Teresa Coll
- Boehringer Ingelheim Veterinary Research Center GmbH&Co., Hannover, Germany
| | - Marina Sibila
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
- * E-mail:
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Del Pozo Sacristán R, Sierens A, Marchioro SB, Vangroenweghe F, Jourquin J, Labarque G, Haesebrouck F, Maes D. Efficacy of early Mycoplasma hyopneumoniae
vaccination against mixed respiratory disease in older fattening pigs. Vet Rec 2014; 174:197. [DOI: 10.1136/vr.101597] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- R. Del Pozo Sacristán
- Unit Porcine Health Management, Department of Reproduction; Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133 Merelbeke 9820 Belgium
| | - A. Sierens
- Unit Porcine Health Management, Department of Reproduction; Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133 Merelbeke 9820 Belgium
| | - S. B. Marchioro
- Department of Pathology; Bacteriology and Avian Diseases; Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133 Merelbeke 9820 Belgium
| | - F. Vangroenweghe
- Elanco Animal Health; Plantin en Moretuslei 1A Antwerpen 2018 Belgium
| | - J. Jourquin
- Elanco Animal Health; Plantin en Moretuslei 1A Antwerpen 2018 Belgium
| | - G. Labarque
- Elanco Animal Health; Plantin en Moretuslei 1A Antwerpen 2018 Belgium
| | - F. Haesebrouck
- Department of Pathology; Bacteriology and Avian Diseases; Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133 Merelbeke 9820 Belgium
| | - D. Maes
- Unit Porcine Health Management, Department of Reproduction; Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133 Merelbeke 9820 Belgium
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Gregersen VR, Sørensen KK, Christensen OF, Busch ME, Vingborg RKK, Velander IH, Lund MS, Bendixen C. Identification of QTL for dorso-caudal chronic pleuritis in 12 crossbred porcine families. Anim Genet 2010; 41:509-14. [DOI: 10.1111/j.1365-2052.2010.02028.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jirawattanapong P, Stockhofe-Zurwieden N, van Leengoed L, Wisselink H, Raymakers R, Cruijsen T, van der Peet-Schwering C, Nielen M, van Nes A. Pleuritis in slaughter pigs: Relations between lung lesions and bacteriology in 10 herds with high pleuritis. Res Vet Sci 2010; 88:11-5. [DOI: 10.1016/j.rvsc.2009.06.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2008] [Revised: 04/23/2009] [Accepted: 06/15/2009] [Indexed: 11/26/2022]
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The relationship between infectious and non-infectious herd factors with pneumonia at slaughter and productive parameters in fattening pigs. Vet J 2009; 179:240-6. [DOI: 10.1016/j.tvjl.2007.10.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2007] [Revised: 08/21/2007] [Accepted: 10/01/2007] [Indexed: 11/20/2022]
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Vieira-Brito F, Vieira-Brito M, Coelho A, Rodrigues J. Ocorrência de Actinobacillus pleuropneumoniae biótipo 1 em pulmões de suínos com pleuropneumonia no Norte de Portugal. ARQ BRAS MED VET ZOO 2008. [DOI: 10.1590/s0102-09352008000600035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
| | | | - A.C. Coelho
- Universidade de Trás-os-Montes e Alto Douro; CECAV, Portugal
| | - J. Rodrigues
- Universidade de Trás-os-Montes e Alto Douro; CECAV, Portugal
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12
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Transmission of pathogenic respiratory bacteria to specific pathogen free pigs at slaughter. Vet Microbiol 2007; 129:325-32. [PMID: 18242013 DOI: 10.1016/j.vetmic.2007.11.030] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2007] [Revised: 11/16/2007] [Accepted: 11/28/2007] [Indexed: 11/21/2022]
Abstract
The purpose of this study was to evaluate the transmission of pathogenic respiratory bacteria to thirteen 5-month-old specific pathogen free (SPF) pigs, during the slaughtering process in a commercial slaughterhouse. Before transportation, the SPF pigs and the lorry were checked to confirm the absence of pathogenic respiratory bacteria. Nine SPF pigs (group 1) were in contact in a conventional slaughterhouse with finishing pigs, during 4h before slaughtering. Four SPF pigs (group 2) were slaughtered immediately at arrival in the slaughterhouse. Five bacterial pathogens (Mycoplasma hyopneumoniae, Actinobacillus pleuropneumoniae, Pasteurella multocida, Haemophilus parasuis and Streptococcus suis) were detected by PCR, after slaughtering, from nasal cavities, tonsils and trachea in the two groups of pigs. Lung samples were PCR negative. Three and four bacterial species were isolated from the pigs of group 2 and group 1, respectively. Cultures were negative from the lungs. All the bacterial species present in the SPF pigs were detected by PCR. P. multocida was isolated, from three samples of scalding water before the onset of slaughtering. Our results suggest that the SPF pigs became contaminated mainly by the slaughterhouse environment and the scalding water. Histological examinations revealed that during scalding, contaminated water could reach the trachea and the lungs of pigs. Checks conducted at slaughter for respiratory disorders have to be carried on, but nasal cavities and tonsils are not appropriate for bacteriological investigations. Moreover, bacteriological results obtained from the lungs of slaughtered pigs have to be used with carefulness.
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Ostanello F, Dottori M, Gusmara C, Leotti G, Sala V. Pneumonia Disease Assessment using a Slaughterhouse Lung-Scoring Method. ACTA ACUST UNITED AC 2007; 54:70-5. [PMID: 17305969 DOI: 10.1111/j.1439-0442.2007.00920.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The aims of this study were the evaluation of a quantitative method for the assessment of pneumonia lesions applied to heavy-weight slaughtered pigs, the identification of risk factors connected with the increase in the prevalence and severity of the lesions and the evaluation of a possible correlation between the presence of pneumonia lesions and the decrease in the carcass quality. The lungs of 10 041 pigs (109 slaughtered batches) coming from 91 farms located in Northern Italy were examined. Lung lesions were scored using the method developed by Madec and Kobisch (Journ. Rech. Porc. Fr., 14, 1982, 405). Before the scoring, anamnestic information regarding the farm of origin of each batch were collected. For 41 batches (3603 pigs), information about carcass quality were also collected. Pneumonia lesions were found in 59.6% of the lungs (range 3-91%), and the average batch score was 2.11 (range 0.03-7.15). We identified as farm risk factors those related to an increase in the severity of the lung lesions, the presence of breeders within the herd, the starting of a growing cycle during the winter season and the lack of vaccination programmes to Mycoplasma hyopneumoniae. Moreover, we also found a statistically significant association between the increase in the mean lung score of the batch and the decrease of the carcass quality.
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Affiliation(s)
- F Ostanello
- Dipartimento di Sanità Pubblica Veterinaria e Patologia Animale, Facoltà di Medicina Veterinaria, Università di Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy.
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