Small colon lesions

Predispositions to disease

-smaller diameter than colon = site of  obstruction of stones and fecoliths

-mesentery (and vascular supply) can tear off  with extensive rectal prolapse ; this means the bowel dies

-Arabs, minis, ponies and younger horses are predisposed to small colon lesions (better able to maintain hydration by removing water from ingesta?)

Clinical signs

1. mild signs of pain – usually simple obstruction; younger horses can seem pretty painful
2. slow deterioration in condition

Even with vascular compromise, initial transient signs of severe abdominal pain -> depression and less severe pain

3.  potentially associated with greater risk of Salmonellosis

Notable

This is a poor area for healing

• high mural collagenase
• poor blood supply
• high bacterial counts
• firm formed manure passes by

Resources

Ponies, miniatures, and younger equids are at higher risk of fecalith obstruction compared to a general colic population. JAVMA | APRIL 2024 | VOL 262 | NO. 4