Understanding jejunal hemorrhage syndrome

Area of Science:

• Veterinary Medicine
• Ruminant Health
• Bovine Diseases

Background:

• Jejunal hemorrhage syndrome (JHS) is an acute, fatal enterotoxemic disorder in dairy cattle.
• JHS has been increasingly reported in recent decades, particularly in early lactation.
• A strong association exists between JHS and Clostridium perfringens type A infection, with Aspergillus fumigatus also implicated.

Purpose of the Study:

• To review the potential etiologic and risk factors for Jejunal Hemorrhage Syndrome (JHS) in dairy cattle.
• To describe the clinical signs, diagnostic approaches, and treatment outcomes for JHS.
• To highlight the challenges in preventing and managing this severe bovine disease.

Main Methods:

• Literature review of studies on Jejunal Hemorrhage Syndrome (JHS).
• Analysis of associations between JHS and potential causative agents like Clostridium perfringens type A and Aspergillus fumigatus.
• Compilation of information on clinical presentation, diagnostic tests, and treatment strategies.

Main Results:

• JHS is strongly associated with Clostridium perfringens type A and potentially Aspergillus fumigatus.
• Clinical signs include decreased feed intake, rapid condition loss, abdominal distension, and bloody feces, often occurring during early lactation on high-energy, low-fiber diets.
• Preventive strategies are undetermined, and intensive medical or surgical treatments have limited success.

Conclusions:

• Jejunal Hemorrhage Syndrome (JHS) poses a significant threat to dairy cattle health due to its high fatality and lack of effective prevention.
• Current understanding suggests a multifactorial etiology involving infectious agents and dietary factors.
• Further research is needed to develop effective preventative measures and treatments for JHS.