Vagal indigestion has how many types?

• A. Three types
• B. Four types
• C. Five types
• D. Two types

Answer: (B)

Vagal indigestion is a functional disorder of foregut motility caused by disruption of vagus nerve control, so the problem can occur at different points along the rumen–reticulum–omasum–abomasum axis. When the nerve signaling to a specific region is impaired, ingesta and gas move or empty in that region abnormally, producing distinct patterns. There are four recognized forms:

• The first form involves poor ruminal motility with failure to eructate, so gas accumulates in the rumen and the animal shows a distended, tympanic abdomen despite eating. Appetite may be present but movement and rumen emptying are sluggish.

• The second form is a blockage between the reticulum and omasum (reticulo-omasal dysfunction). Ingesta cannot pass efficiently into the omasum, leading to continued rumen/reticulum distension with signs of chronic bloat and poor feed utilization.

• The third form is abomasal outflow disturbance, where the abomasum fails to empty properly. This causes distension behind the rumen, abdominal tympany, and progressive weight loss as digestion from the abomasum is impaired.

• The fourth form is the distal type, a more advanced vagal dysfunction affecting postgastric outflow, including the abomasum and pyloric region. It presents with ongoing distension and poor prognosis due to widespread motility failure.

Thus, four types are used to describe vagal indigestion, each defined by where the functional obstruction or motility failure occurs along the foregut.