Korean Journal of Veterinary Service (한국동물위생학회지)

The Korean Society of Veterinary Service (한국동물위생학회)
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Incidental finding of hemolymph nodes in a Holstein cow (Bos taurus taurus) with coccidiosis

  • Ho-Seong Cho (College of Veterinary Medicine and Bio-Safety Research Institute, Jeonbuk National University) ;
  • Sang-Joon Lee (College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University) ;
  • Yunchan Lee (College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University) ;
  • Yeonsu Oh (College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University)
  • Received : 2023.03.05
  • Accepted : 2023.03.18
  • Published : 2023.03.30
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Abstract

This case report is about hemolymph nodes found in a dairy cow whose function is still not fully elucidated. A 4-month Holstein cow presented severe respiratory symptoms and hematochezia for a while with respiratory acidosis and metabolic alkalosis. Coccidiosis was diagnosed and treated immediately, but the cow died from respiratory acidosis and metabolic alkalosis. At necropsy, no abnormal appearance in thoracic and peritoneal organs was observed, but hemolymph nodes were observed being multifocally stuck on omasum serosa and the subcutaneous fascia of abdominal region, and the larger dark red lymph nodes were found along the omasum great curvature. Microscopically, lymphoid depletion and lymphadenitis in the lymph nodes were examined to point systemic infection, and in the hemolymph node, multifocally demarcated pale lesions with macrophage infiltration and fibrin deposition nearby subcapsular sinus. In subcapsular sinus of the hemolymph node, rod to linear gram-negative bacteria were found. Through this study, we might conclude that the hemolymph node is involved in pathogen phagocytosis.

Keywords

Acknowledgement

This work was supported by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry (IPET) through Animal Disease Management Technology Advancement Support Program, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (Project No. 322003-2).

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