Ranjan Rakesh, Kuniyal Aruna, Ranjan Amita, Singh Meetpal, Jyotsana Basanti, Sawal R K, Ashok Khulape Sagar
ICAR-National Research Centre on Camel, Bikaner, 334001, Rajasthan, India.
Rajasthan University of Veterinary and Animal Sciences, Bikaner, 334001, Rajasthan, India.
Trop Anim Health Prod. 2025 Mar 14;57(2):117. doi: 10.1007/s11250-025-04372-0.
Recent studies revealed increasing incidence of udder infections caused by Coagulase Negative Staphylococci (CNS) in dairy cattle, though studies in dromedary camel are meagre. The present report describes sub-clinical mastitis in two dromedary camels caused by Staphylococcus borealis, a recently recognized udder pathogen in cattle. The bacterium was identified on the basis of morphological and biochemical characteristics, MALDI-TOF MS analysis, 16s rRNA sequencing and BLAST. Phylogenetic analysis was also performed. The isolate was submitted to National Centre for Veterinary Type Cultures, Hisar, India. The bacterium showed varying biochemical reactions as compared to bovine and human isolates. The bacterium has high antibiotic sensitivity perhaps due to less use of antibiotics in treatment of different diseases in camel. To our knowledge, this is the first report indicating Staphylococcus borealis as a cause of subclinical mastitis in dromedary camel.
最近的研究表明，奶牛中由凝固酶阴性葡萄球菌（CNS）引起的乳房感染发病率不断上升，不过有关单峰骆驼的相关研究却很少。本报告描述了两峰单峰骆驼发生的由北方葡萄球菌引起的亚临床乳腺炎，北方葡萄球菌是最近在牛中发现的一种乳房病原体。通过形态学和生化特征、基质辅助激光解吸电离飞行时间质谱（MALDI-TOF MS）分析、16s rRNA测序和BLAST鉴定出了该细菌。还进行了系统发育分析。该分离株已提交至印度希萨尔的国家兽医类型培养中心。与牛和人的分离株相比，该细菌表现出不同的生化反应。该细菌具有较高的抗生素敏感性，这可能是因为骆驼在治疗不同疾病时较少使用抗生素。据我们所知，这是第一份表明北方葡萄球菌是单峰骆驼亚临床乳腺炎病因的报告。
