Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (11): 5721-5731.doi: 10.11843/j.issn.0366-6964.2025.11.030

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Surveillance and Analysis of Mycoplasma bovis, Mannheimia hyopneumoniae, Pasteurella multocida and Klebsiella pneumonia in Ningxia Region

LI Jiaren1,2(), GUO Ya'nan1,*(), WANG Jiandong1, SHAO Xicheng3, WANG Xueyi3, HE Shenghu2   

  1. 1. Institute of Animal Science, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
    2. Ningxia University, Yinchuan 750021, China
    3. Animal Disease Prevention and Control Center, Xiji 756200, China
  • Received:2025-01-06 Online:2025-11-23 Published:2025-11-27
  • Contact: GUO Ya'nan E-mail:297219549@qq.com;gyn330@126.com

Abstract:

In recent years, bovine respiratory diseases have been increasingly reported, posing significant threats to the cattle industry. Large-scale outbreaks can result in substantial and often irreversible economic losses for livestock operations. This study aims to investigate the prevalence of key respiratory pathogens—Mycoplasma bovis (M. bovis), Mannheimia haemolytica (Mh), Pasteurella multocida (Pm), and Klebsiella pneumoniae (K.pn) —in calves from the Ningxia Hui Autonomous Region. A total of 457 nasal swab and tissue samples were collected from cattle across various counties and districts in Ningxia between 2022 and 2024. Pathogen identification was conducted using a combination of morphological examination and molecular diagnostic techniques. The infection rates of M. bovis, Mh, Pm, and K.pn were systematically analyzed based on year, geographic region, season, and developmental stage of the cattle. Among the four pathogens studied, Pm exhibited the highest overall detection rate (38.73%), a difference that was highly significant compared with the other three pathogens (P < 0.001). In the central arid zone, the prevalence of M. bovis was significantly greater than in both the Yellow River irrigation area (P < 0.01) and the southern mountainous region (P < 0.001). Seasonally, winter yielded peak detection rates for M. bovis (50%) and K.pn (70.5%), both of which exceeded summer and autumn rates (P < 0.001). Conversely, Pm reached its highest autumn prevalence (45.3%), significantly surpassing its winter (P < 0.01) and spring (P < 0.001) levels. During the growing phase, Pm detection was markedly higher than during both the lactation and mature phases (P < 0.001). Finally, single Pm infections were the most common (16.85%), significantly outnumbering mixed infections (P < 0.01), and the most frequent mixed co-infection occurred with Mh+Pm at 7.22%. This comprehensive epidemiological analysis delineates how temporal, geographical, seasonal, and developmental variables affect bovine respiratory pathogen prevalence in Ningxia, thereby furnishing a scientific framework to guide targeted prevention and control strategies for bacterial respiratory infections in the region.

Key words: Ningxia region, Mycoplasma bovis, Mannheimia hyopneumoniae, Pasteurella multocida, Klebsiella pneumoniae

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