Chronic norovirus infection in an HIV-positive patient with persistent diarrhoea: a novel cause.

The Monsall Unit, Infectious Diseases and Tropical Medicine Department, North Manchester General Hospital, Manchester, UK Enteric Virus Unit, Virus Reference Department, Centre for Infections, Health Protection Agency, Colindale, London, UK Central Manchester Foundation Trust, Department of Virology, Manchester, UK Molecular Diagnostics Department, Health Protection Agency North West, Manchester Royal Infirmary, Manchester, UK