In shunt infections, symptoms vary with the route of drainage. In ventriculo-peritoneal shunts, the symptoms often resemble those of a blockage. This is because the shunt becomes infected and the lower catheter is very often then sealed off by tissue. There may be accompanying fever and abdominal pain or discomfort. In ventriculo-atrial shunt infections, fever is present in most cases though often intermittently.
Anaemia is frequently present, and sometimes skin rashes along with joint pains.
In contrast to ventriculo-peritoneal shunts, such infections may not appear for months or years after the operation when they were contracted. Various tests can be carried out for shunt infections and medical advice should always be sought if an infection is suspected. Shunt blockages which are causing illness usually require an operation to replace or adjust the offending part of the shunt. Shunt infections are usually treated by removal of the whole shunt and a course of antibiotics before insertion of a new system. Modern approaches to antibiotic therapy mean that such treatment can be expected to succeed in most cases.