Lung consolidation caused by Mycoplasma hyopneumoniae has a negative effect on productive performance and economic revenue in finishing pigs

Ferraz, Maria Eugênia Silveira; Almeida, H. M. S.; Storino, Gabriel Yuri; Sonálio, Karina; Souza, Mauro Rodrigo de; Moura, Cristiano Soares de; Costa, W. M.; Lunardi, Liege Segabinazzi; Linhares, Daniel; Oliveira, Luís Guilherme de

doi:10.1016/j.prevetmed.2020.105091

Cited by 35 publications

(42 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Regarding PH infection and its impact on pig production, our results showed that ADWG and bacteremia estimates were weakly correlated, indicating that there might be other pathogens associated with the decrease of ADWG in the evaluated animals. An example could be the respiratory disease caused by Mycoplasma hyopneumoniae [ 36 ], which has been commonly associated with a decrease in productivity. Furthermore, ADWG of PH-infected male pigs was higher than ADWG from female pigs (0.95 kg/day and 0.88 kg/day, respectively).…”

Section: Discussionmentioning

confidence: 99%

Porcine hemothropic mycoplasmas infection associated with productive impact in intensive pig production

et al. 2020

View full text Add to dashboard Cite

Background So far, three porcine hemoplasmas (PH) have been identified, namely Mycoplasma suis, Mycoplasma parvum, and Mycoplasma haemosuis. The first one is the main agent associated with porcine hemoplasmosis, a possible cause of economic losses in pig production. Thus, this work aimed to detect and quantify PH 16S rRNA in finishing pigs and to associate its load estimate with average daily weight gain (ADWG). For this purpose, whole blood samples from 318 pigs were collected at an age of 75 days (d0) when the pigs entered the finishing phase and 105 days later (d105). To calculate ADWG, the animals were weighed at the abovementioned dates. Then, DNA from blood samples were submitted to a qPCR targeting the 16S rRNA gene for PH. Spearman correlation test was performed to investigate potential associations between ADWG and the quantification values. Lastly, the molecular characterization of PH was done by sequencing the 23S rDNA gene. Results Out of the 318 samples, 190 (59.74%) were positive on d0, and 304 (95.6%) were positive on d105. A significant correlation was observed (p < 0.05), albeit with a low coefficient value (0.18), when comparing ADWG with quantification values on d105. The phylogenetic analysis based on the 23S rDNA gene showed that four sequences were closely related to M. parvum, and one sequence was positioned in the M. suis cluster. Conclusion Two PH, M. suis and M. parvum, were detected in a Brazilian pig farm. Moreover, increasing occurrence through time was observed, which may have affected the productive performance of positive animals, mainly at the end of the finishing phase, when antimicrobials are removed.

show abstract

Section: Discussionmentioning

confidence: 99%

Porcine hemothropic mycoplasmas infection associated with productive impact in intensive pig production

et al. 2020

View full text Add to dashboard Cite

show abstract

“…5 Natural Resources Institute Finland (LUKE), Kampusranta 9, 60320 Seinäjoki, Finland. 6 Departament de Ciència Animal I dels Aliments, Facultat de Veterinaria, Universitat Autònoma de Barcelona, Barcelona, Spain.…”

Section: Acknowledgementsunclassified

“…Lesions in the lungs, heart, pleura and liver are the most important ones observed during post-mortem examinations at the abattoir [3]. They represent lesions caused by respiratory pathogens and parasite infestations that contribute to reduced performance [4][5][6][7] during the grower-finisher period. Pneumonia and pleurisy are the most commonly observed lung lesions at the abattoir [8][9][10] and they are associated with an increased likelihood of observing other lung lesions such as abscesses and scars [3,11].…”

Section: Introductionmentioning

confidence: 99%

“…Their calculations were based on industry standard costs associated with 6% increase in mortality during the grower-finisher period, a prevalence of pleurisy of 20%, reduction in ADG of 50 g and reduction of feed conversion efficiency of 0.1. Ferraz et al [6] estimated a cost of US$6.55 (approximately €5.5) per pig produced considering a reduction in ADG of 27 g associated with lesions (pneumonia and pleurisy) in ≥15% of the lungs compared with pigs with no lesions. Doing these calculations is not easy as there are other variables such as market prices fluctuations and the complex interrelationships between different aspects of production to consider when using real-world farm-level data.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A bio-economic simulation study on the association between key performance indicators and pluck lesions in Irish farrow-to-finish pig farms

et al. 2020

View full text Add to dashboard Cite

Background Pluck lesions are associated with decreased performance in grower-finisher pigs, but their economic impact needs to be further investigated. This study aimed to identify the main pluck lesions and the cut-off value for their prevalence, associated with changes in average daily gain (ADG) during the wean-to-finish period, to simulate their effects on economic performance of farrow-to-finish farms. Pigs (n = 162 ± 51.9 per farm) from 56 farrow-to-finish farms were inspected at slaughter and the prevalence of enzootic pneumonia-like lesions, pleurisy, lung scars, abscesses, pericarditis, and liver milk spots was estimated. For each farm, annual performance indicators were obtained. Regression trees analysis (RTA) was used to identify pluck lesions and to estimate cut-off values for their prevalence associated with changes in ADG. Different scenarios were simulated as per RTA results and economic and risk analyses were performed using the Teagasc Pig Production Model. Risk analysis was performed by Monte Carlo sampling using the Microsoft Excel add-in @Risk with 10,000 iterations. Results Pleurisy and lung scars were the main lesions associated with changes in ADG. Three scenarios were simulated based on RTA results: a 728 sow farrow-to-finish farm with prevalence of i) pleurisy < 25% and lung scars < 8% (LPLSC; ADG = 760 g); ii) pleurisy < 25% and lung scar ≥8% (LPHSC; ADG = 725 g) and iii) pleurisy ≥25% (HP; ADG = 671 g). The economic analysis showed increased feed and dead animals for disposal costs, and lower sales in the HP and LPHSC scenarios than in the LPLSC scenario; thereby reducing gross margin and net profit. Results from the risk analysis showed lower probability of reaching any given level of profit in the HP scenario compared with the LPHSC and LPLSC scenarios. Conclusion Under the conditions of this study, higher prevalence of pleurisy and lung scars were associated with decreased ADG during the grower-finisher period and with lower economic return in the simulated farms. These results highlight the economic benefits and importance of preventing and/or controlling respiratory disease.

show abstract

“…Furthermore, records on meat inspection findings of pig carcases are considered valuable indicators of financial losses due to morbidity of the animals [ 4 , 5 , 6 , 7 ]. Ferraz et al [ 8 ] showed that a high percentage of lung lesions at slaughter lead to economic losses of up to USD 6.55 (EUR 5.40) per pig slaughtered. Other studies indicated that the frequency of pathological findings depends not only on the farm management and related health status of the pigs [ 9 , 10 , 11 ], but also on the veterinarians who carried out the meat inspections [ 12 , 13 , 14 , 15 , 16 , 17 ], slaughterhouses [ 12 ], and seasonal occurrence of certain lesions [ 9 , 12 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Agricultural Holdings and Slaughterhouses’ Impact on Patterns of Pathological Findings Observed during Post-Mortem Meat Inspection

Klinger

Conrady

Mikula

et al. 2021

Animals

View full text Add to dashboard Cite

Meat inspection data can provide valuable information about herd health to producers, veterinarians and veterinary authorities and can be used as a feedback system for farmers to improve their herd management. The aim of this study was to analyse the influence of agricultural holdings, slaughterhouses and time periods (quarters) on the occurrence and composition of the prevalence of post-mortem findings of 4 million pigs slaughtered in Austria in 2016, by applying a permutation multivariate analysis of variance. Pneumonia (21.9%) and milk spots (19.9%) were the most frequently recorded conditions. Our analysis indicated a statistically significant influence of all three considered factors (agricultural holdings, slaughterhouses and periods) on the prevalence of post-mortem findings. The observed prevalence could not only be explained by the differences between the farms of origin and slaughterhouses but also by the variability within the slaughterhouses. Much of the explained variance of the prevalence was due to differences between producers (mean R2 = 0.61), followed by slaughterhouses (mean R2 = 0.19) and period (mean R2 = 0.05). To meet the demand for a valid feedback system to farmers and attending veterinarians, a robust and ideally more detailed recording of frequent pathologies, especially those affecting the respiratory tract and the liver, should be developed.

show abstract

Lung consolidation caused by Mycoplasma hyopneumoniae has a negative effect on productive performance and economic revenue in finishing pigs

Cited by 35 publications

References 28 publications

Porcine hemothropic mycoplasmas infection associated with productive impact in intensive pig production

Porcine hemothropic mycoplasmas infection associated with productive impact in intensive pig production

A bio-economic simulation study on the association between key performance indicators and pluck lesions in Irish farrow-to-finish pig farms

Agricultural Holdings and Slaughterhouses’ Impact on Patterns of Pathological Findings Observed during Post-Mortem Meat Inspection

Contact Info

Product

Resources

About