Analysis of correlation between the detection rate of Mycoplasma hyopneumoniae in slaughter pigs and season, climate change, and presence of lung lesions

• Autorzy: Li R.C. , Hu Y.L. , Ge M. , Zhao D. , Yang T.T. , Qing R.K. , Yu X.L.
• Języki publikacji: EN

Abstrakty

EN

The purpose of this study was to analyze the correlation of the rate of Mycoplasma hyopneumoniae (M. hyo) in slaughter pigs with season, climate change and enzootic pneumonia (EP) lesions. We collected 530 slaughter pig lungs with suspected lesions from two slaughterhouses in different seasons and weather conditions from November 2014 to March 2017 in Changsha Hunan Province, China. The EP lesions of these lungs were quantified, and a PCR analysis was used to detect M. hyo in samples of bronchoalveolar lavage fluid (BALF). Twenty percent, 10%, and 9% of the lung specimens were scored 1-5, 6-10, and ≥ 11, respectively. Additionally, we found that 36% of all BALF samples tested positive for M. hyo. Among the lung specimens collected in winter, 41% scored 1 or more, and 53% tested positive for M. hyo. With respect to seasons, the lung specimens collected in summer showed the least number of EP lesions and the lowest positive testing rate for M. hyo. Of these specimens, 27% scored 1 or more, and 22% tested positive for M. hyo. Additionally, low temperature and fast temperature change (during 10 days before sampling) were associated with a higher rate of M. hyo detection in BALF. There was a positive correlation between the lung EP lesion score and the detection rate of M. hyo in the BALF of slaughter pigs. In conclusion, lung EP lesion scoring in slaughter pigs is of referential value to the evaluation of the dynamics of M. hyo infection in a swine population. It is essential to control the spread of M. hyo by careful management of swine populations, and the prevention and control of M. hyo in fattening pigs is of great significance to the eradication of the disease.

Słowa kluczowe

EN

animal disease; slaughter animal; bronchoalveolar lavage fluid; pig; Mycoplasma hyopneumoniae; season; climate change; lung lesion; China

• Wydawca: -
• Czasopismo: Medycyna Weterynaryjna
• Rocznik: 2019
• Tom: 75
• Numer: 03
• Opis fizyczny: p.175-178,ref.

Twórcy

autor

Li R.C.

• College of Veterinary Medicine, Hunan Agricultural University, Changsha, China

autor

Hu Y.L.

• College of Veterinary Medicine, Hunan Agricultural University, Changsha, China

autor

Ge M.

• College of Veterinary Medicine, Hunan Agricultural University, Changsha, China

autor

Zhao D.

• College of Veterinary Medicine, Hunan Agricultural University, Changsha, China

autor

Yang T.T.

• College of Veterinary Medicine, Hunan Agricultural University, Changsha, China

autor

Qing R.K.

• College of Veterinary Medicine, Hunan Agricultural University, Changsha, China

autor

Yu X.L.

• College of Veterinary Medicine, Hunan Agricultural University, Changsha, China

Bibliografia

• Amass S. F., Clark L. K., van Alstine W. G., Bowersock T. L., Murphy D. A., Knox, K. E. and Albregts S. R.: Interaction of Mycoplasma hyopneumoniae and Pasteurella multocida infections in swine. J. Am. Vet. Med. Assoc. 1994, 204, 102-107.
• Caron J., Ouardani M., Dea S.: Diagnosis and differentiation of Mycoplasma hyopneumoniae and Mycoplasma hyorhinis infections in pigs by PCR amplification of the p36 and p46 genes. J. Clin. Microbiol. 2000, 38, 1390-1396.
• Caruso J. P., Ross, R. F.: Effects of Mycoplasma hyopneumoniae and Actinobacillus (Haemophilus) pleuropneumoniae infections on alveolar macrophage functions in swine. Am. J. Vet. Res. 1990, 52, 227-231.
• Calsamiglia M., Collins J. E., Pijoan C.: Correlation between the presence of enzootic pneumonia lesions and detection of Mycoplasma hyopneumoniae in bronchial swabs by PCR. Vet. Microbiol. 2000, 76, 299-303.
• Dee S., Otake S., Deen J.: Use of a production region model to assess the efficacy of various air filtration systems for preventing airborne transmission of porcine reproductive and respiratory syndrome virus and Mycoplasma hyopneumoniae: Results from a 2-year study. Virus. Res. 2010, 154, 177-184.
• Donham K. J.: Association of environmental air contaminants with disease and productivity in swine. Am. J. Vet. Res. 1991, 52, 1723-1730.
• Goodwin R. F.: Apparent reinfection of enzootic-pneumonia-free pig herds: search for possible causes. Vet. Record. 1985, 116, 690-694.
• Fano E., Pijoan C., Dee S.: Dynamics and persistence of Mycoplasma hyopneumoniae infection in pigs. Can. J. Vet. Res. 2005, 69, 223-228.
• Hillen S., Berg S. V., Köhler K., Reinacher M., Willems H., Reiner G.: Occurrence and severity of lung lesions in slaughter pigs vaccinated against Mycoplasma hyopneumoniae with different strategies. Prevent. Vet. Med. 2014, 113, 580-588.
• Madec F., Kobisch M.: Bilan lésionnel des poumons de porcs charcutiers à l’abattoir. Journ. Rech. Porc. Fr. 1982, 14, 405-412.
• Meyns T., Dewulf J., Kruif A. D., Calus D., Haesebrouck F., Maes D.: Comparison of transmission of Mycoplasma hyopneumoniae in vaccinated and non-vaccinated populations. Vaccine 2006, 24, 7081-7086.
• Meyns T., Steelant J. V., Rolly E., Dewulf J., Haesebrouck F., Maes D.: A crosssectional study of risk factors associated with pulmonary lesions in pigs at slaughter. Vet. J. 2011, 187, 388-392.
• Morante B. G., Segales J., Fraile L., Perez de Rosas A., Maiti H., Coll T., Sibila M.: Assessment of Mycoplasma hyopneumoniae-induced pneumonia using different lung lesion scoring systems: A comparative review. J. Comp. Pathol. 2016, 154, 125-134.
• Noyes E. P., Feeney D. A., Pijoan C.: Comparison of the effect of pneumonia detected during lifetime with pneumonia detected at slaughter on growth in swine. J. Am. Vet. Med. Assoc. 1990, 197, 1025-1029.
• Otake S., Dee S., Corzo C., Oliveira S., Deen J.: Long-distance airborne transport of infectious PRRSV and Mycoplasma hyopneumoniae from a swine population infected with multiple viral variants. Vet. Microbiol. 2010, 145, 198-208.
• Sibila M., Pieters M., Molitor T., Maes D., Haesebrouck F., Segales J.: Current perspectives on the diagnosis and epidemiology of Mycoplasma hyopneumoniae infection. Vet. J. 2009, 181, 221-231.
• Sørensen V., Ahrens P., Barfod K., Feenstra A. A., Feld N. C., Friis N. F., Bille-Hansen V., Jensen N. E., Pedersen M. W.: Mycoplasma hyopneumoniae infection in pigs: Duration of the disease and evaluation of four diagnostic assays. Vet. Microbiol. 1997, 54, 23-34.
• Straw B. E., Tuovinen V. K., Bigras-Poulin M.: Estimation of the cost of pneumonia in swine herds. J. Am. Vet. Med. Assoc. 1989, 195, 1702-1706.
• Thacker E. L., Thacker B. J., Janke B. H.: Interaction between Mycoplasma hyopneumoniae and swine influenza virus. J. Clin. Microbiol. 2001, 39, 2525-2530.
• Vangroenweghe F. A. C. J., Labarque G. G., Piepers S., Minder K. S., Maes D.: Mycoplasma hyopneumoniae infections in peri-weaned and post-weaned pigs in Belgium and the Netherlands: Prevalence and associations with climatic conditions. Vet. J. 2015, 205, 93-97.
• Villarreal I., Meyns T., Dewulf J., Vranckx K., Calus D., Pasmans F., Haesebrouck F., Maes D.: The effect of vaccination on the transmission of Mycoplasma hyopneumoniae in pigs under field conditions. Vet. J. 2011, 188, 48-52.
• Verhagen J. M. F.: Acclimation of growing pigs to climatic environment. Thesis, Wageningen, the Netherlands 1987, P. 111.
• Wilson S., Brussel L. V., Saunders G., Taylor L., Zimmermann L., Heinritzi K., Ritzmann M., Banholzer E., Eddicks M.: Vaccination of piglets at 1 week of age with an inactivated Mycoplasma hyopneumoniae vaccine reduces lung lesions and improves average daily gain in body weight. Vaccine 2012, 30, 7625-7629.

Identyfikatory

DOI

10.21521/mw.6196