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Research Article


Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis

Junxue Qiu, Mengke Si, Xiaoyu Chong, Yiwei Wang, Baolei Yang, Mingfeng Chu, Yuchen Liang, Wei Cheng, Yanping Qi, Xuelong Chen, Yan Liang.


Abstract
Background:
A comprehensive understanding of the distribution of Streptococcus agalactiae, a major pathogen responsible for bovine mastitis, is critical for guiding therapeutic and control strategies.

Aim:
Thus, the objective of this meta-analysis is to investigate the prevalence and antimicrobial resistance (AMR) of S. agalactiae associated with bovine mastitis in China between 2004 and 2024.

Methods:
The relevant literature was retrieved from PubMed, Google Scholar, and the China National Knowledge Infrastructure database. Following the PRISMA guidelines, 33 studies were included in the final analysis, of which 14 reported AMR data. All analyses were performed using the STATA software.

Results:
The pooled S. agalactiae prevalence was 24%. Subgroup analyses revealed a higher prevalence in Central China, an upward trend over time (2019–2024 vs. before 2019), and a higher prevalence in clinical cases than in subclinical mastitis. The pooled AMR data indicated that sulfonamides had the highest resistance rates, followed by aminoglycosides, β-lactams, lincosamides, macrolides, tetracyclines, quinolones, and chloramphenicol.

Conclusion:
These findings highlight the need for continued surveillance and refinement of therapeutic protocols to effectively manage S. agalactiae-induced mastitis in Chinese dairy herds.

Key words: Antimicrobial resistance; Bovine mastitis; Epidemiology; Meta-analysis; Streptococcus agalactiae.


 
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How to Cite this Article
Pubmed Style

Qiu J, Si M, Chong X, Wang Y, Yang B, Chu M, Liang Y, Cheng W, Qi Y, Chen X, Liang Y. Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis. Open Vet. J.. 2025; 15(9): 4060-4074. doi:10.5455/OVJ.2025.v15.i9.10

Web Style

Qiu J, Si M, Chong X, Wang Y, Yang B, Chu M, Liang Y, Cheng W, Qi Y, Chen X, Liang Y. Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis. https://www.openveterinaryjournal.com/?mno=263713 [Access: October 06, 2025]. doi:10.5455/OVJ.2025.v15.i9.10

AMA (American Medical Association) Style

Qiu J, Si M, Chong X, Wang Y, Yang B, Chu M, Liang Y, Cheng W, Qi Y, Chen X, Liang Y. Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis. Open Vet. J.. 2025; 15(9): 4060-4074. doi:10.5455/OVJ.2025.v15.i9.10


Vancouver/ICMJE Style

Qiu J, Si M, Chong X, Wang Y, Yang B, Chu M, Liang Y, Cheng W, Qi Y, Chen X, Liang Y. Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis. Open Vet. J.. (2025), [cited October 06, 2025]; 15(9): 4060-4074. doi:10.5455/OVJ.2025.v15.i9.10


Harvard Style

Qiu, J., Si, . M., Chong, . X., Wang, . Y., Yang, . B., Chu, . M., Liang, . Y., Cheng, . W., Qi, . Y., Chen, . X. & Liang, . Y. (2025) Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis. Open Vet. J., 15 (9), 4060-4074. doi:10.5455/OVJ.2025.v15.i9.10


Turabian Style

Qiu, Junxue, Mengke Si, Xiaoyu Chong, Yiwei Wang, Baolei Yang, Mingfeng Chu, Yuchen Liang, Wei Cheng, Yanping Qi, Xuelong Chen, and Yan Liang. 2025. Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis. Open Veterinary Journal, 15 (9), 4060-4074. doi:10.5455/OVJ.2025.v15.i9.10


Chicago Style

Qiu, Junxue, Mengke Si, Xiaoyu Chong, Yiwei Wang, Baolei Yang, Mingfeng Chu, Yuchen Liang, Wei Cheng, Yanping Qi, Xuelong Chen, and Yan Liang. "Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis." Open Veterinary Journal 15 (2025), 4060-4074. doi:10.5455/OVJ.2025.v15.i9.10


MLA (The Modern Language Association) Style

Qiu, Junxue, Mengke Si, Xiaoyu Chong, Yiwei Wang, Baolei Yang, Mingfeng Chu, Yuchen Liang, Wei Cheng, Yanping Qi, Xuelong Chen, and Yan Liang. "Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis." Open Veterinary Journal 15.9 (2025), 4060-4074. Print. doi:10.5455/OVJ.2025.v15.i9.10


APA (American Psychological Association) Style

Qiu, J., Si, . M., Chong, . X., Wang, . Y., Yang, . B., Chu, . M., Liang, . Y., Cheng, . W., Qi, . Y., Chen, . X. & Liang, . Y. (2025) Prevalence and antimicrobial resistance of Streptococcus agalactiae associated with bovine mastitis in China: A meta-analysis. Open Veterinary Journal, 15 (9), 4060-4074. doi:10.5455/OVJ.2025.v15.i9.10


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