Ruminostomy (Holstein Calf)

A Holstein calf of approximately 4 months of age presents with chronic recurrent bloat of long standing, not fully resolved with medical therapy. This condition generally affects fattening calves fed a diet rich in nonstructural carbohydrates and low in fiber, which causes chronic ruminitis. In this calf, the probable cause stems from improper functioning of the esophageal groove since the first days of life, resulting in retention of ingested milk at the ruminal level and subsequent alteration of the ruminal mucosa. In less frequent cases, chronic gas accumulation in the rumen may be due to difficulty eructating from a mechanical cause, following external pressure on the esophagus from enlarged mediastinal lymph nodes. In adult animals, reticulodiaphragmatic abscesses may also be present, resulting from penetrating foreign bodies. Cases of partial esophageal obstruction due to the presence of papillomas on its mucosa have also been reported.
In the differential diagnosis of ruminal tympany, it is always necessary to rule out infection with Clostridium tetani.