1Majowicz, SE et al. (2014) Global incidence of human Shiga toxin–producing Escherichia coli infections and deaths: a systematic review and knowledge synthesis. Foodborne Pathogens and Disease 11, 447–455.
2Kirk, MD et al. (2015) World Health Organization estimates of the global and regional disease burden of 22 foodborne bacterial, protozoal, and viral diseases, 2010: a data synthesis. PLoS Medicine 12, e1001921.
3Pires, SM et al. (2009) Attributing the human disease burden of foodborne infections to specific sources. Foodborne Pathogens and Disease 6, 417–424.
4Kintz, E et al. (2017) Transmission pathways for sporadic Shiga-toxin producing E. coli infections: a systematic review and meta-analysis. International Journal of Hygiene and Environmental Health 220, 57–67.
5Sargeant, JM and O'Connor, AM (2014) Introduction to systematic reviews in animal agriculture and veterinary medicine. Zoonoses and Public Health 61, 3–9.
6Hooman, N et al. (2016) The prevalence of Shiga toxin-producing Escherichia coli in patients with gastroenteritis and sources of infections in Iran: a systematic review study protocol. Journal of Pediatric Nephrology 4, 82–85.
7Paudyal, N et al. (2017) Prevalence of foodborne pathogens in food from selected African countries – a meta-analysis. International Journal of Food Microbiology 249, 35–43.
8Viswanathan, M and Berkman, ND (2012) Development of the RTI item bank on risk of bias and precision of observational studies. Journal of Clinical Epidemiology 65, 163–178.
9Viswanathan, M et al. .
10Sterne, JAC (2016) ROBINS-I: a tool for assessing risk of bias in non-randomised studies of interventions. British Medical Journal 355, i4919. doi: https://doi.org/10.1136/bmj.i4919.
11Werber, D et al. (2007) Shiga toxin-producing Escherichia coli infection in Germany - different risk factors for different age groups. American Journal of Epidemiology 165, 425–434.
12Richardson, LC et al. (2017) An updated scheme for categorizing foods implicated in foodborne disease outbreaks: a tri-agency collaboration. Foodborne Pathogens and Disease 14, 701–710.
13Begg, CB and Mazumdar, M (1994) Operating characteristics of a rank correlation test for publication bias. Biometrics 50, 1088–1101.
14Egger, M et al. (1997) Bias in meta-analysis detected by a simple, graphical test. British Medical Journal 315, 629–634.
15Duval, S and Tweedie, R (2000) Trim and fill: a simple funnel-plot–based method of testing and adjusting for publication bias in meta-analysis. Biometrics 56, 455–463.
16Domingues, AR et al. (2012) Source attribution of human campylobacteriosis using a meta-analysis of case-control studies of sporadic infections. Epidemiology and Infection 140, 970–981.
17Domingues, AR et al. (2012) Source attribution of human salmonellosis using a meta-analysis of case-control studies of sporadic infections. Epidemiology and Infection 140, 959–969.
18Viechtbauer, W (2010) Conducting meta-analyses in R with the metafor package. Journal of Statistical Software 36, 1–48.
19MacDonald, KL et al. (1988) Escherichia coli O157:H7, an emerging gastrointestinal pathogen. Results of a one-year, prospective, population-based study. Journal of the American Medical Association 259, 3567–3570.
20Bryant, HE, Athar, MA and Pai, CH (1989) Risk factors for Escherichia coli O157:H7 infection in an urban community. Journal of Infectious Diseases 160, 858–864.
21Le Saux, N et al. (1993) Ground beef consumption in noncommercial settings is a risk factor for sporadic Escherichia coli O157:H7 infection in Canada. Journal of Infectious Diseases 167, 500–502.
22Rowe, PC et al. (1993) Diarrhoea in close contacts as a risk factor for childhood haemolytic uraemic syndrome. Epidemiology and Infection 110, 9–16.
23Slutsker, L et al. (1998) A nationwide case-control study of Escherichia coli O157:H7 infection in the United States. Journal of Infectious Diseases 177, 962–966.
24Holton, D et al. (1999) A Canadian multicentre case-control study of sporadic Escherichia coli O157:H7 infection. Canadian Journal of Infectious Diseases 10, 117–121.
25Finelli, et al. (1995) Enhanced detection of sporadic Escherichia coli O157:H7 infections–New Jersey, July 1994. Journal of the American Medical Association 274, 17–18.
26Mead, PS et al. (1997) Risk factors for sporadic infection with Escherichia coli O157:H7. Archives of Internal Medicine 157, 204–208.
27Parry, SM et al. (1998) Risk factors for and prevention of sporadic infections with vero cytotoxin (shiga toxin) producing Escherichia coli O157. Lancet 351, 1019–1022.
28O'Brien, SJ, Adak, GK and Gilham, C (2001) Contact with farming environment as a major risk factor for Shiga toxin (Vero cytotoxin)-producing Escherichia coli O157 infection in humans. Emerging Infectious Diseases 7, 1049–1051.
29Kassenborg, HD et al. (2004) Farm visits and undercooked hamburgers as major risk factors for sporadic Escherichia coli O157:H7 infection: data from a case-control study in 5 FoodNet sites. Clinical Infectious Diseases 38, S271–S278.
30Piérard, D et al. (1999) A case-control study of sporadic infection with O157 and non-O157 verocytotoxin-producing Escherichia coli. Epidemiology and Infection 122, 359–365.
31Locking, ME et al. (2001) Risk factors for sporadic cases of Escherichia coli O157 infection: the importance of contact with animal excreta. Epidemiology and Infection 127, 215–220.
32Voetsch, AC et al. (2007) Risk factors for sporadic Shiga toxin-producing Escherichia coli O157 infections in FoodNet sites, 1999–2000. Epidemiology and Infection 135, 993–1000.
33Vaillant, V et al. (2009) Undercooked ground beef and person-to-person transmission as major risk factors for sporadic hemolytic uremic syndrome related to Shiga-toxin producing Escherichia coli infections in children in France. Pediatric Infectious Diseases Journal 28, 650–653.
34Rivas, M et al. (2008) Risk factors for sporadic Shiga toxin-producing Escherichia coli infections in children, Argentina. Emerging Infectious Diseases 14, 763–771.
35Hundy, RL and Cameron, S (2004) Risk factors for sporadic human infection with Shiga toxin-producing Escherichia coli in South Australia. Communicable Disease Intelligence 28, 74–79.
36Denno, DM et al. (2009) Tri-county comprehensive assessment of risk factors for sporadic reportable bacterial enteric infection in children. Journal of Infectious Diseases 199, 467–476.
37McPherson, M et al. (2009) Serogroup-specific risk factors for Shiga toxin-producing Escherichia coli infection in Australia. Clinical Infectious Diseases 49, 249–256.
38Friesema, IH et al. (2015) Risk factors for sporadic Shiga toxin-producing Escherichia coli O157 and non-O157 illness in the Netherlands, 2008–2012, using periodically surveyed controls. Epidemiology and Infection 143, 1360–1367.
39Jaros, P et al. (2013) A prospective case-control and molecular epidemiological study of human cases of Shiga toxin-producing Escherichia coli in New Zealand. BMC Infectious Diseases 13, 1.
40Kemp, R (2005) The Epidemiology of VTEC O157, Non-O157 VTEC and Campylobacter spp. in a 100 km2 Dairy Farming Area in Northwest England (PhD thesis). University of Liverpool, Liverpool, UK. http://www.opengrey.eu/item/display/10068/926085.
42Hoffman, S et al. (2017) Attribution of global foodborne disease to specific foods: findings from a World Health Organization structured expert elicitation. PloS ONE 12, e0183641.
43Persad, A and Lejeune, J (2015) Animal reservoirs of Shiga toxin-producing Escherichia coli. In Sperandio, V and Hovde, C (eds), Enterohemorrhagic Escherichia coli and Other Shiga Toxin-Producing E. coli. Washington, DC: ASM Press, pp. pp. 231–244. doi: 10.1128/microbiolspec.EHEC-0027-2014.
44Ferens, WA and Hovde, CJ (2011) Escherichia coli O157:H7: animal reservoir and sources of human infection. Foodborne Pathogens and Disease 8, 465–487.
45von Elm, E et al. (2007) The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) statement: guidelines for reporting observational studies. Bulletin of the World Health Organization 85, 867–872.
46Sterne, JAC et al. (2011) Recommendations for examining and interpreting funnel plot asymmetry in meta-analyses of randomised controlled trials. The British Medical Journal 343, d4002.
47Thompson, SG and Higgins, JP (2002) How should meta-regression analyses be undertaken and interpreted? Statistics in Medicine 21, 1559–1573.