Clinical features and treatment response to differentiate idiopathic peritonitis from non-strangulating intestinal infarction of the pelvic flexure associated with Strongylus vulgaris infection in the horse.
Authors: Hedberg-Alm Ylva, Tydén Eva, Tamminen Lena-Mari, Lindström Lisa, Anlén Karin, Svensson Maria, Riihimäki Miia
Journal: BMC veterinary research
Summary
# Editorial Summary Distinguishing between idiopathic peritonitis and non-strangulating intestinal infarction (NSII) of the pelvic flexure in acute colic cases presents a significant clinical challenge, particularly as *Strongylus vulgaris* prevalence has risen in Nordic countries following selective deworming protocols introduced in 2007—a trend with potential implications for UK practitioners using similar strategies. Swedish researchers reviewed medical records from three referral hospitals (2017–2020) to identify clinical and laboratory parameters that could differentiate these two conditions, both of which present with colic and systemic inflammation but carry vastly different prognoses: idiopathic peritonitis typically responds favourably to medical management, whilst NSII secondary to *S. vulgaris*-induced thrombosis carries a guarded prognosis even after surgical intervention. By comparing demographic data, clinical progression, laboratory findings, and response to antimicrobial therapy between confirmed NSII and idiopathic peritonitis cases, the authors sought diagnostic markers that could guide early treatment decisions and prognostication. Understanding which clinical and laboratory features reliably distinguish these conditions would allow practitioners to counsel owners appropriately and pursue either aggressive medical management or surgical referral with greater confidence, particularly in populations where strongyle burden remains a concern despite modern anthelmintic protocols.
Read the full abstract on PubMed
Practical Takeaways
- •Early differentiation between idiopathic peritonitis and NSII is critical—idiopathic cases respond to medical management while NSII requires surgical intervention and carries poor prognosis
- •Monitor clinical and laboratory parameters carefully in peritonitis cases to guide treatment decisions and provide accurate prognostic counselling to owners
- •Consider S. vulgaris as a potential underlying cause of NSII in horses, particularly in regions with documented increased prevalence; selective deworming protocols may need reassessment
Key Findings
- •Peritonitis secondary to non-strangulating infarction has guarded prognosis even after intestinal resection, while idiopathic peritonitis responds well to medical treatment
- •Clinical differentiation between NSII and idiopathic peritonitis is possible through comparison of clinical and laboratory parameters
- •Strongylus vulgaris larval migration causes thrombus formation leading to NSII in horses
- •S. vulgaris prevalence increased in Sweden following selective anthelmintic treatment implementation in 2007