

@article {5554,
	title = {{Risk factors for symptomatic and asymptomatic norovirus infection in the community}},
	journal = {Epidemiology and Infection},
	volume = {139},
	year = {2011},
	pages = {1{\textendash}11},
	abstract = {The objective of this study was to investigate risk factors for norovirus-associated infectious intestinal disease (IID) and asymptomatic norovirus infection. Individuals with IID and healthy controls were recruited in a community-based study in England (19931996). This is the first risk-factor study to use viral load measurements, generated by real-time RTPCR, to identify cases of norovirus-associated IID and asymptomatic infections. Using multivariable logistic regression the main risk factor identified for norovirus-associated IID was contact with a person with IID symptoms. Infectious contacts accounted for 54{\%} of norovirus cases in young children and 39{\%} of norovirus cases in older children and adults. For young children, contacts outside the household presented the highest risk ; for older children and adults, the highest risk was associated with child contacts inside the household. Foreign travel and consumption of shellfish increased the risk of norovirus-associated IID. Lifestyle and dietary factors were associated with a decreased risk of both norovirus-associated IID and asymptomatic infection. No risk factors were identified for asymptomatic norovirus infection.},
	keywords = {gastrointestinal infections, infectious disease epidemiology},
	issn = {0950-2688},
	doi = {10.1017/S0950268810002839},
	author = {Phillips, Gemma}
}
