1.Kirk, MD, Roberts, L, Horvath, J. Understanding gastroenteritis in elderly residents of aged-care facilities. Medical Journal of Australia 2008; 189: 476–477.
2.Koopmans, M. Progress in understanding norovirus epidemiology. Current Opinion in Infectious Diseases 2008; 21: 544–552.
3.de Wit, MA, et al. Sensor, a population-based cohort study on gastroenteritis in the Netherlands: incidence and etiology. American Journal of Epidemiology 2001; 154: 666–674.
4.Musher, DM, Musher, BL. Contagious acute gastrointestinal infections. New England Journal of Medicine 2004; 351: 2417–2427.
5.Verhoef, L, et al. Emergence of new norovirus variants on spring cruise ships and prediction of winter epidemics. Emerging Infectious Diseases 2008; 14: 238–243.
6.van Duynhoven, YT, et al. A one-year intensified study of outbreaks of gastroenteritis in The Netherlands. Epidemiology and Infection 2005; 133: 9–21.
7.Lopman, B, et al. Increase in viral gastroenteritis outbreaks in Europe and epidemic spread of new norovirus variant. Lancet 2004; 363: 682–688.
8.Widdowson, MA, et al. Outbreaks of acute gastroenteritis on cruise ships and on land: identification of a predominant circulating strain of norovirus – United States, 2002. Journal of Infectious Diseases 2004; 190: 27–36.
9.Dolin, R. Noroviruses – challenges to control. New England Journal of Medicine 2007; 357: 1072–1073.
10.Ludwig, A, et al. Quantitative detection of norovirus excretion in pediatric patients with cancer and prolonged gastroenteritis and shedding of norovirus. Journal of Medical Virology 2008; 80: 1461–1467.
11.Teunis, PF, et al. Norwalk virus: how infectious is it? Journal of Medical Virology 2008; 80: 1468–1476.
12.Lopman, BA, et al. Clinical manifestation of norovirus gastroenteritis in health care settings. Clinical Infectious Diseases 2004; 39: 318–324.
13.Mattner, F, et al. Risk groups for clinical complications of norovirus infections: an outbreak investigation. Clinical Microbiology and Infection 2006; 12: 69–74.
14.Siebenga, JJ, et al. High prevalence of prolonged norovirus shedding and illness among hospitalized patients: a model for in vivo molecular evolution. Journal of Infectious Diseases 2008; 198: 994–1001.
15.Wu, HM, et al. A norovirus outbreak at a long-term-care facility: the role of environmental surface contamination. Infection Control and Hospital Epidemiology 2005; 26: 802–810.
16.Okada, M, et al. Genetic analysis of noroviruses associated with fatalities in healthcare facilities. Archives of Virology 2006; 151: 1635–1641.
17.Calderon-Margalit, R, et al. A large-scale gastroenteritis outbreak associated with Norovirus in nursing homes. Epidemiology and Infection 2005; 133: 35–40.
18.Frenzen, PD. Mortality due to gastroenteritis of unknown etiology in the United States. J Infect Dis 2003; 187: 441–452.
19.Harris, JP, et al. Deaths from norovirus among the elderly, England and Wales. Emerging Infectious Diseases 2008; 14: 1546–52.
20.Verhoef, L, et al. Import of norovirus infections in the Netherlands and Ireland following pilgrimages to Lourdes, 2008 – preliminary report. Eurosurveillance 2008; 13: pii: 19025.
21.Malorny, B, et al. Diagnostic real-time PCR for detection of Salmonella in food. Applied and Environmental Microbiology 2004; 70: 7046–7052.
22.Best, EL, et al. Applicability of a rapid duplex real-time PCR assay for speciation of Campylobacter jejuni and Campylobacter coli directly from culture plates. FEMS Microbiology Letters 2003; 229: 237–241.
23.Vu, DT, et al. Detection of Shigella by a PCR assay targeting the ipaH gene suggests increased prevalence of shigellosis in Nha Trang, Vietnam. Journal of Clinical Microbiology 2004; 42: 2031–2035.
24.Svraka, S, et al. Etiological role of viruses in outbreaks of acute gastroenteritis in The Netherlands from 1994 through 2005. Journal of Clinical Microbiology 2007; 45: 1389–1394.
25.van den Berg, RJ, et al. Rapid diagnosis of toxinogenic Clostridium difficile in faecal samples with internally controlled real-time PCR. Clinical Microbiology and Infection 2006; 12: 184–186.
26.Siebenga, JJ, et al. Epochal evolution of GGII.4 norovirus capsid proteins from 1995 to 2006. Journal of Virology 2007; 81: 9932–9941.
27.Charlson, M, et al. Validation of a combined comorbidity index. Journal of Clinical Epidemiology 1994; 47: 1245–1251.
28.Mahoney, FI, Barthel, DW. Functional evaluation: the Barthel Index. Maryland State Medical Journal 1965; 14: 61–65.
30.Duizer, E, et al. Probabilities in norovirus outbreak diagnosis. Journal of Clinical Virology 2007; 40: 38–42.
31.Marks, PJ, et al. Evidence for airborne transmission of Norwalk-like virus (NLV) in a hotel restaurant. Epidemiology and Infection 2000; 124: 481–487.
32.High, KP. Infection in an ageing world. Lancet Infectious Diseases 2002; 2: 655.
33.Friesema, IH, et al. Norovirus outbreaks in nursing homes: the evaluation of infection control measures. Epidemiology and Infection 2009; 137: 1722–1733.
34.Ferry, M. Strategies for ensuring good hydration in the elderly. Nutrition Reviews 2005; 63: S22–29.
35.Chang, KO. Role of cholesterol pathways in norovirus replication. Journal of Virology 2009; 83: 8587–8595.
36.Mitka, M. Expanding statin use to help more at-risk patients is causing financial heartburn. Journal of the American Medical Association 2003; 290: 2243–2245.
37.Van Asten, L, et al. Greater pathogenicity of norovirus strains in 2003? A syndromic approach. Advances in Disease Surveillance 2007; 2: 175.
38.McIntosh, I. Elderly travellers, individuals with disabilities and fitness to travel. In: Lockie, C et al. , eds. Travel Medicine and Migrant Health. UK: Churchill Livingstone, 2000, pp. 106–108.
39.Teunis, P, et al. A reconsideration of the Campylobacter dose-response relation. Epidemiology and Infection 2005; 133: 583–592.
40.Gallimore, CI, et al. Asymptomatic and symptomatic excretion of noroviruses during a hospital outbreak of gastroenteritis. Journal of Clinical Microbiology 2004; 42: 2271–2274.