Antibiotics should be used routinely to prevent infection in patients with all the following conditions except?

Antibiotics are typically employed to prevent or treat bacterial infections, particularly in patients who are at heightened risk due to compromised immune function or other underlying health conditions.

In patients with agranulocytosis, there is a significant reduction in white blood cells, leaving them vulnerable to infections, thus warranting the prophylactic use of antibiotics. Similarly, severe uncontrolled diabetes can lead to impairments in immune response, making these individuals more susceptible to infections, and they may also require antibiotics for prevention or treatment of bacterial infections.

Aplastic anaemia is another condition characterized by the failure of the bone marrow to produce enough blood cells, including white blood cells. This lack of immune cells means that individuals with aplastic anaemia should also receive antibiotics to prevent infections.

On the other hand, mumps is a viral infection caused by the mumps virus and not a bacterial pathogen. As such, antibiotics are ineffective against viral infections, and routine prophylactic use of antibiotics in these cases is unnecessary and inappropriate. The focus for mumps is on supportive care rather than antibiotic therapy, as antibiotics target bacterial infections and do not provide any benefit in the case of viral diseases.