ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (9): 1477-1488.doi: 10.11843/j.issn.0366-6964.2015.09.001

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Infectious Status of Mastitis in Dairy Cattle Induced by Staphylococcus aureus and Its Advances on Epidemiological Patterns and Antimicrobial Resistance in Northern China

WANG Xiao,YU Ying*   

  1. (Key Laboratory of Animal Genetics,Breeding and Reproduction,Ministry of Agriculture & National Engineering Laboratory for Animal Breeding,College of Animal Science and Technology,China Agricultural University,Beijing 100193,China)
  • Received:2015-01-09 Online:2015-09-23 Published:2015-09-23

Abstract:

Bovine mastitis,especially subclinical mastitis that induced by Staphylococcus aureus (S.aureus),is the most common disease,which is very difficult to prevent and control in dairy industries.In recent five years,our research group has collected 1 112 milk samples from nine dairy farms in Northern China,which included lactating cows with high and low somatic cell counts(SCC) as well as clinical mastitis cows within eleven sampling batches.A total of 191 strains of S.aureus were isolated and identified in the detected Northern dairy cattle and the average infectious ratio of mastitis infected by S.aureus was 11.7%(the lactating cattle was 12.4% and the clinical mastitis cattle was 10.8%).Antimicrobial susceptibility test and toxic genes detection revealed that Chloramphenicol,Amikacin and Cefoperazone had strong inhibitory effects on S.aureus mastitis, the highest detection rate of the toxic genes was panton-valentine leukocidin gene(70.2%).Pulsed-field gel electrophoresis (PFGE) analysis revealed the epidemical patterns of S.aureus in mastitis cattle in Northern and Eastern China.Combined with the related studies from domestic and foreign countries,the review systematically compared and analyzed the infectious ratio,the antibiotic resistance,the main toxic genes,the epidemical patterns of S.aureus mastitis.The strategies to prevent and control the incidence of S.aureus mastitis in dairy cattle were also discussed.

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