Beset with persistent infection and necrosis, his left leg was eventually amputated.

This constitutes the broadest category of infections as it can include both cytocidal and persistent infection.

There are some viruses that can maintain a persistent infection by infecting different cells of the body.

Persistent infections associated with bleeding in patients over 40 require urgent investigation ?

Persistent infections are characterized by the continual presence of the infectious organism, often as latent infection with occasional recurrent relapses of active infection.