1. Bailey RL, Ledikwe JH, Smiciklas-Wright H, Mitchell DC, Jensen GL. Persistent oral health problems associated with co-morbidity and impaired diet quality in older adults. Journal of the American Dietetic Association. 2004;104(8):1273–1276. [PubMed: 15281046]
  2. Beck M, Kolbeck PC, Rohr LH, Shi Q, Morris VC, Levander OA. Benign human enterovirus becomes virulent in selenium-deficient mice. Journal of Medical Virology. 1994;43(2):166–170. [PubMed: 8083665]
  3. Belisle SE, Leka LS, Delgado-Lista J, Jacques PF, Ordovas JM, Meydani SN. Polymorphisms at cytokine genes may determine the effect of vitamin E on cytokine production in the elderly. Journal of Nutrition. 2009;139(10):1855–1860. [PMC free article: PMC2744609] [PubMed: 19710156]
  4. Bernhard D, Laufer G. The aging cardiomyocyte: A mini-review. Gerontology. 2008;54(1):24–31. [PubMed: 18196923]
  5. Bernstein ME, Tucker KL, Ryan ND, O’Neill EF, Clements KM, Nelson ME, Evans WJ, Singh MAF. Higher dietary variety is associated with better nutritional status in frail elderly people. Journal of the American Dietetic Association. 2002;102(8):1096–1104. [PubMed: 12171454]
  6. Blaser MJ, Feldman RA. Salmonella bacteremia: Reports to the Centers for Disease Control, 1968–1979. Journal of Infectious Diseases. 1981;143(5):743–746. [PubMed: 6263988]
  7. Blom H, Nerbrink E, Dainty R, Hagtvedt T, Borch E, Nissen H, Nesbakkehn T. Addition of 2.5 percent lactate and 0.25 percent acetate controls growth of Listeria monocytogenes in vacuum-packed, sensory-acceptable servelat sausage and cooked ham stored at 4 degrees C. International Journal of Food Microbiology. 1997;38(1):71–76. [PubMed: 9498139]
  8. Breece CR, Ingram RL, Sonntag WE. Influence of age and long-term dietary restriction on plasma insulin-like growth factor-1 (IGF-1), IGF-1 gene expression, and IGF-1 binding proteins. Journal of Gerontology. 1991;46(5):B180–B187. [PubMed: 1716275]
  9. Buell JS, Scott TM, Dawson-Hughes B, Dallal GE, Rosenberg IH, Foldstein MF, Tucker KL. Vitamin D is associated with cognitive function in elders receiving home health services. Journal of Gerontology Series A: Biological Sciences and Medical Sciences. 2009;64(8):888–895. [PMC free article: PMC2981461] [PubMed: 19377013]
  10. Cain WS, Stevens JC. Uniformity of olfactory loss in aging. Annals of the New York Academy of Sciences. 1989;561:29–38. [PubMed: 2735685]
  11. Calle EE, Thun MJ, Petrelli JM, Rodriguez C, Heath CW. Body-mass index and mortality in a prospective cohort of U.S. adults. New England Journal of Medicine. 1999;341(15):1097–1105. [PubMed: 10511607]
  12. Cavaliere C, Rea P, Lynch ME, Blumenthal M. Herbal supplement sales experience slight increase in 2008. HerbalGram. 2009;82:58–61.
  13. CDC (Centers for Disease Control and Prevention). Vital signs: State-specific obesity prevalence among adults—United States, 2009. Morbidity and Mortality Weekly Report. 2010;59:1–5. [PubMed: 20689500]
  14. Chan JM, Stampfer MJ, Giovannucci E, Gann PH, Ma J, Wilkinson P, Hennekens CH, Pollak M. Plasma insulin-like growth factor-1 and prostate cancer risk: A prospective study. Science. 1998;279:563–566. [PubMed: 9438850]
  15. Clark CG, Farber J, Pagotto F, Ciampa N, Dore K, Nadon C, Bernard K, Ng LK. Surveillance for Listeria monocytogenes and listeriosis, 1995–2004. Epidemiology and Infection. 2010;138(4):559–572. [PubMed: 19818199]
  16. Colman RJ, Anderson RM, Johnson SC, Kastman EK, Kosmatka KJ, Beasley TM, Allison DB, Cruzen C, Simmons HA, Kemnitz JW, Weindruch R. Caloric restriction delays disease onset and mortality in rhesus monkeys. Science. 2009;325(5937):201–204. [PMC free article: PMC2812811] [PubMed: 19590001]
  17. CSPI (Center for Science in the Public Interest). Dirty Dining. Washington, DC: CSPI; 2008.
  18. Cuite CL, Condry SC, Nucci ML, Hallman WK. Public response to the contaminated spinach recall of 2006 Publication number RR-0107-013. New Brunswick, NJ: Rutgers, the State University of New Jersey, Food Policy Institute; 2007.
  19. Cuite CL, Schefske SD, Randolph EM, Hooker NH, Nucci ML, Hallman WK. Public response to the Salmonella Saintpaul outbreak of 2008 Publication number RR-1208-017. New Brunswick, NJ: Rutgers, the State University of New Jersey, Food Policy Institute; 2008.
  20. Cummings SR. The biology of aging. Journal of Musculoskeletal and Neuronal Interactions. 2007;7(4):340–341. [PubMed: 18094503]
  21. D’Archivio M, Filesi C, Varì R, Scazzocchio B, Masella R. Bioavailability of the pholyphenols: Status and controversies. International Journal of Molecular Sciences. 2010;11(4):1321–1342. [PMC free article: PMC2871118] [PubMed: 20480022]
  22. Daly KT, Tracy AC, Malik M, Wang T, Francke-Carroll S, Magnuson BA. Enhanced estrogenic responses and sensitivity to azoxymethane following dietary soy isoflavone supplementation in older female rats. Food and Chemical Toxicology. 2007;45(4):628–637. [PubMed: 17157426]
  23. Dundas S, Todd WT, Stewart AL, Murdoch PS, Chaudhuri AK, Hutchinson SJ. The central Scotland Escherichia coli O157:H7 outbreak: Risk factors for the hemolytic uremic syndrome and death among hospitalized patients. Clinical Infectious Diseases. 2001;33(7):923–931. [PubMed: 11528561]
  24. Edgar B, Bailey D, Bergstrand R, Johnsson G, Regårdh CG. Acute effects of drinking grapefruit juice on the pharmacokinetics and dynamics of felodipine—and its potential clinical relevance. European Journal of Clinical Pharmacology. 1992;42(3):313–317. [PubMed: 1577050]
  25. FDA/HHS (U.S. Food and Drug Administration/Department of Health and Human Services). Food labeling: Revision of reference values and mandatory nutrients. Advance notice of proposed rulemaking. Federal Register. 2007;72(212):62149–62174.
  26. Fontana L, Meyer TE, Klein S, Holloszy JO. Long-term calorie restriction is highly effective in reducing the risk for atherosclerosis in humans. Proceedings of the National Academy of Sciences. 2004;101(17):6659–6663. [PMC free article: PMC404101] [PubMed: 15096581]
  27. Fontana L, Weiss EP, Villareal DT, Klein S, Holloszy JO. Long-term effects of calorie or protein restriction on serum IGF-1 and IGFBP-3 concentration in humans. Aging Cell. 2008;7(5):681–687. [PMC free article: PMC2673798] [PubMed: 18843793]
  28. Fontana L, Klein S, Holloszy JO. Effects of long-term calorie restriction and endurance exercise on glucose intolerance, insulin action, and adipokine production. Age. 2009;32(1):97–108. [PMC free article: PMC2829643] [PubMed: 19904628]
  29. Gay RT, Belisle S, Beck MA, Meydani SN. An aged host promotes the evolution of avirulent coxsackievirus into a virulent strain. Proceedings of the National Academy of Sciences. 2006;103(37):13825–13830. [PMC free article: PMC1564236] [PubMed: 16950876]
  30. Ginsberg G, Hattis D, Russ A, Sonawane B. Pharmacokinetic and pharmacodynamic factors that can affect sensitivity to neurotoxic sequelae in elderly individuals. Environmental Health Perspectives. 2005;113(9):1243–1249. [PMC free article: PMC1280410] [PubMed: 16140636]
  31. Greenblatt DJ. Update on drug interactions with grapefruit juice. Pharmacy Times [Continuing Education] 2010;76:95–104.
  32. Hallman WK, Cuite CL, Hooker NH. Consumer responses to food recalls: 2008 national survey report Publication number RR-0109-018. New Brunswick, NJ: Rutgers, the State University of New Jersey, Food Policy Institute; 2009.
  33. Hankinson SE, Willett WC, Colditz GA, Hunter DJ, Michaud DS, Deroo B, Rosner B, Speizer FE, Pollak M. Circulating concentrations of insulin-like growth factor-1 and risk of breast cancer. Lancet. 1998;351(9113):1393–1396. [PubMed: 9593409]
  34. Hannan MT, Tucker KL, Dawson-Hughes B, Cupples LA, Felson DT, Kiel DP. Effect of dietary protein on bone loss in elderly men and women: the Framingham osteoporosis study. Journal of Bone and Mineral Research. 2000;15(12):2504–2512. [PubMed: 11127216]
  35. Hayek MG, Meydani SN, Meydani M, Blumberg JB. Age differences in eicosanoid production of mouse splenocytes: Effects on mitogen-induced T-cell proliferation. Journal of Gerontology. 1994;49(5):B197–207. [PubMed: 8056932]
  36. Healton EB, Savage DG, Brust JCM, Garrett TJ, Lindenbaum J. Neurologic aspects of cobalamin deficiency. Medicine. 1991;70(4):229–245. [PubMed: 1648656]
  37. Hickson M. Malnutrition and ageing. Postgraduate Medical Journal. 2006;82(963):2–8. [PMC free article: PMC2563720] [PubMed: 16397072]
  38. Holloszy JO. Mortality rate and longevity of food-restricted exercising male rats: A reevaluation. Journal of Applied Physiology. 1997;82(2):399–403. [PubMed: 9049716]
  39. Hopkins MJ, Macfarlane CG. Changes in predominant bacterial populations in human feces with age and with Clostridium difficile infection. Journal of Medical Microbiology. 2002;51(5):448–454. [PubMed: 11990498]
  40. Houston DK, Nicklas BJ, Ding J, Harris TB, Tylavsky FA, Newman AB, Lee JS, Sahyoun NR, Visser M, Kritchevsky SB. Dietary protein intake is associated with lean mass change in older, community-dwelling adults: The Health, Aging, and Body Composition (Health ABC) Study. American Journal of Clinical Nutrition. 2008;87(1):150–155. [PubMed: 18175749]
  41. Hu FB, Willett WC, Li T, Stampfer MJ, Colditz GA, Manson JE. Adiposity as compared with physical activity in predicting mortality among women. New England Journal of Medicine. 2004;351(26):2694–2703. [PubMed: 15616204]
  42. IFIC (International Food Information Council). Food & Health Survey: Consumer Attitudes toward Food, Nutrition & Health. Washington, DC: International Food Information Council Foundation; 2009.
  43. IOM (Institute of Medicine). Nutrition and Food Sciences . Washington, DC: National Academy Press; 1994.
  44. IOM. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (Macronutrients). Washington, DC: The National Academies Press; 2005. [PubMed: 12449285]
  45. IOM. Dietary Reference Intakes: The essential guide to nutrient requirements. Otten JJ, Hellwig JP, Meyers LD, editors. Washington, DC: The National Academies Press; 2006.
  46. Kamp BJ, Wellman NS, Russell C. Position of the American Dietetic Association, American Society for Nutrition, and Society for Nutrition Education: Food and nutrition programs for community-residing older adults. Journal of the American Dietetic Association. 2010;110(3):463–472. [PubMed: 20213956]
  47. Kwan LL, Bermudez OI, Tucker KL. Low vitamin B12 intake and status are more prevalent in Hispanic older adults of Caribbean origin than in neighborhood-matched non-Hispanic whites. Journal of Nutrition. 2002;132(7):2059–2064. [PubMed: 12097693]
  48. Kwon Y, Magnuson BA. Aging alters acute apoptotic response to azoxymethane in the colon of rats. Experimental Gerontology. 2007;42(12):1154–1161. [PubMed: 17961945]
  49. Kwon Y, Magnuson BA. Age-related differential responses to curcumin-induced apoptosis during the initiation of colon cancer in rats. Food Chemical Toxicology. 2009;47(2):377–385. [PubMed: 19095035]
  50. Kwon Y, Malik M, Magnuson BA. Inhibition of colonic aberrant crypt foci by curcumin in rats is affected by age. Nutrition and Cancer. 2004;48(1):37–43. [PubMed: 15203376]
  51. Lianou A, Geornaras I, Kendall PA, Scanga JA, Sofos JN. Behavior of Listeria monocytogenes at 7 degrees C in commercial turkey breast, with or without antimicrobials, after simulated contamination for manufacturing, retail and consumer settings. Food Microbiology. 2007;24(5):433–443. [PubMed: 17367676]
  52. Lichtenstein AH, Rasmussen H, Yu WW, Epstein SR, Russell RM. Modified MyPyramid for older adults. Journal of Nutrition. 2008;138(1):5–11. [PubMed: 18156396]
  53. Lilja JJ, Kivisto KT, Backman JT, Lamberg TS, Neuvonen PJ. Grapefruit juice substantially increases plasma concentrations of buspirone. Clinical Pharmacology and Therapeutics. 1998;64(6):655–660. [PubMed: 9871430]
  54. Loya AM, Gonzalez-Stuart A, Rivera JO. Prevalence of polypharmacy, polyherbacy, nutritional supplement use and potential product interactions among older adults living on the United States-Mexico border: A descriptive, questionnaire-based study. Drugs and Aging. 2009;26(5):423–436. [PubMed: 19552494]
  55. McFarland LV. Meta-analysis of probiotics for the prevention of antibiotic associated diarrhea and the treatment of Clostridium difficile disease. The American Journal of Gastroenterology. 2006;101(4):812–822. [PubMed: 16635227]
  56. McFarland LV. Systematic review and meta-analysis of Saccharromyces boulardii in adult patients. World Journal of Gastroenterology. 2010;16(18):2202–2222. [PMC free article: PMC2868213] [PubMed: 20458757]
  57. Merete C, Falcon LM, Tucker KL. Vitamin B6. is associated with depressive symptomatology in Massachusetts elders. Journal of the American College of Nutrition. 2008;27(3):421–427. [PMC free article: PMC2572855] [PubMed: 18838531]
  58. Meydani SN, Ribaya-Mercado JD, Russell RM, Sahyoun N, Morrow FD, Gershoff SN. The effect of vitamin B6 on the immune response of healthy elderly. Annals of the New York Academy of Sciences. 1990;587:303–306.
  59. Meydani SN, Lichtenstein AH, Cornwall S, Meydani M, Goldin BR, Rasmussen H, Dinarello CA, Schaefer EJ. Immunologic effects of national cholesterol education panel step-2 diets with and without fish-derived N-3 fatty acid enrichment. Journal of Clinical Investigation. 1993;92(1):105–113. [PMC free article: PMC293543] [PubMed: 8325975]
  60. Meydani SN, Meydani M, Blumberg JB, Leka LS, Siber G, Loszewski R, Thompson C, Pedrosa MC, Diamond RD, Stollar BD. Vitamin E supplementation and in vivo immune response in healthy elderly subjects. A randomized controlled trial. Journal of the American Medical Association. 1997;277(17):1380–1386. [PubMed: 9134944]
  61. Meydani SN, Keka LS, Fine BC, Dallal GE, Keusch GT, Singh MF, Hamer DH. Vitamin E and respiratory tract infections in elderly nursing home residents: A randomized controlled trial. Journal of the American Medical Association. 2004;292(7):828–836. [PMC free article: PMC2377357] [PubMed: 15315997]
  62. Meydani SN, Barnett JB, Dallal GE, Fine BC, Jacques PF, Leka LS, Hamer DH. Serum zinc and pneumonia in nursing home elderly. American Journal of Clinical Nutrition. 2007;86(4):1167–1173. [PMC free article: PMC2323679] [PubMed: 17921398]
  63. Murphy C, Schubert CR, Cruickshanks KJ, Klein BE, Klein R, Nondahl DM. Prevalence of olfactory impairment in older adults. Journal of the American Medical Association. 2002;288(18):2307–2312. [PubMed: 12425708]
  64. Newby PK, Muller D, Hallfrisch J, Qiao N, Andres R, Tucker KL. Dietary patterns and changes in body mass index and waist circumference in adults. American Journal of Clinical Nutrition. 2003;77(6):1417–1425. [PubMed: 12791618]
  65. Nucci ML, Cuite CL, Hallman WK. When good food goes bad: Television network news and the spinach outbreak of 2006. Science Communication. 2009;31(2):238–265.
  66. Ogden CL, Carroll MD, Curtin LR, McDowell MA, Tabak CJ, Flegal KM. Prevalence of overweight and obesity in the United States, 1999–2004. The Journal of the American Medical Association. 2006;295(13):1549–1555. [PubMed: 16595758]
  67. Pallast EG, Schouten EG, de Waart FG, Fonk HC, Doekes G, von Blomberg BM, Kok FJ. Effect of 50- and 100-mg vitamin E supplements on cellular immune function in noninstitutionalized elderly persons. American Journal of Clinical Nutrition. 1999;69(6):1273–1281. [PubMed: 10357750]
  68. Pelchat ML. Is age-related olfactory loss uniform across odorants? In: Lorig TS, editor. Compendium of Olfactory Research. Dubuque, Iowa: Kendall/Hunt Publishing Company; 2001. pp. 3–12.
  69. Peterson RT, Nass R, Boyd WA, Freedman JH, Dong K, Narahashi T. Use of non-mammalian alternative models for neurotoxicological study. Neurotoxicology. 2008;29(3):546–555. [PMC free article: PMC2702842] [PubMed: 18538410]
  70. Rand WM, Pellett PL, Young VR. Meta-analysis of nitrogen balance studies for estimating protein requirements in healthy adults. American Journal of Clinical Nutrition. 2003;77(1):109–127. [PubMed: 12499330]
  71. Ren Z, Gay R, Thomas A, Pae M, Wu D, Logsdon L, Mecsas J, Meydani SN. Effect of age on susceptibility to Salmonella Typhimurium infection in C57BL/6 mice. Journal of Medical Microbiology. 2009;58(Pt12):1559–1567. [PMC free article: PMC2783761] [PubMed: 19729455]
  72. Russell RM, Rasmussen H, Lichtenstein AH. Modified food guide pyramid for people over seventy years of age. Journal of Nutrition. 1999;129(3):751–753. [PubMed: 10082784]
  73. Saper RB, Kales SN, Paquin J, Burns MJ, Eisenberg DM, Davis RB, Phillips RS. Heavy metal content of ayurvedic herbal medicine products. Journal of the American Medical Association. 2004;292(23):2868–2873. [PubMed: 15598918]
  74. Schiffman S. Effects of aging on the human taste system. Annals of the New York Academy of Sciences. 2009;1170:725–729. [PubMed: 19686219]
  75. Schmelz EM, Levi E, Du J, Xu H, Majumdar AP. Age-related loss of EGF-receptor related protein (ERRP) in the aging colon is a potential risk factor for colon cancer. Mechanisms of Ageing and Development. 2004;125(12):917–922. [PubMed: 15563939]
  76. Shatenstein B, Payette H, Nadon S, Gray-Donald K. An approach for evaluating lifelong intakes of functional foods in elderly people. Journal of Nutrition. 2003;133(7):2384–2391. [PubMed: 12840210]
  77. Shimokawa I, Higami Y, Hubbard GB, McMahan CA, Masoro EJ, Yu BP. Diet and the suitability of the male Fischer 344 rat as a model for aging research. Journal of Gerontology. 1993;48(1):B27–B32. [PubMed: 8418135]
  78. Shu CH, Hummel T, Lee PL, Chiu CH, Lin SH, Yuan BC. The proportion of self-rated olfactory dysfunction does not change across the life-span. American Journal of Rhinology and Allergy. 2009;23(4):413–416. [PubMed: 19671258]
  79. Sivapalasingam S, Hoekstra RM, McQuiston JR, Fields PI, Tauxe RV. Salmonella bacteriuria: an increasing entity in elderly women in the United States. Epidemiology and Infection. 2004;132(5):897–902. [PMC free article: PMC2870177] [PubMed: 15473153]
  80. Soliman N, el-Batran M, el-Nofely A. Oral health and nutritional status in Egyptian elderly. Journal of Nutritional Science and Vitaminology. 1999;45(5):533–541. [PubMed: 10683806]
  81. Sullivan DH, Martin W, Flaxman N, Hagen JE. Oral health problems and involuntary weight loss in a population of frail elderly. Journal of the American Geriatrics Society. 1993;41(7):725–731. [PubMed: 8315182]
  82. Talegawkar SA, Johnson EJ, Carithers T, Taylor HA Jr, Bogle ML, Tucker KL. Total alpha-tocopherol intakes are associated with serum alpha-tocopherol concentrations in African American adults. Journal of Nutrition. 2007;137(10):2297–2303. [PubMed: 17885014]
  83. Thaler RH, Sunstein CS. Nudge: Improving Decisions about Health, Wealth, and Happiness. Penguin Books; USA: 2004.
  84. Tucker KL, Rich S, Rosenberg I, Jacques P, Dallal G, Wilson PW, Selhub J. Plasma vitamin B-12 concentrations relate to intake source in the Framingham Offspring Study. American Journal of Clinical Nutrition. 2000;71(2):514–522. [PubMed: 10648266]
  85. Tucker KL, Qiao N, Scott T, Rosenberg I, Spiro A. High homocysteine and low B vitamins predict cognitive decline in aging men: The Veterans Affairs Normative Aging Study. American Journal of Clinical Nutrition. 2005;82(3):627–635. [PubMed: 16155277]
  86. USDA (U.S. Department of Agriculture). Economic Information Bulletin No. (EIB-61), Food Spending Declined and Food Insecurity Increased for Middle-Income and Low-Income Households from 2000 to 2007. 2009. [(accessed August 5, 2010)]. www​.ers.usda.gov/Publications/EIB61.
  87. Vugia D, Cronquist A, Cartter M, Tobin-D’Angelo M, Blythe D, Smith K, Lathrop S, Morse D, Cieslak P, Dunn J, Holt KG, Henao OL, Hoekstra RM, Angulo FJ, Griffin PM, Tauxe RV, Trivedi KK. Preliminary FoodNet data on the incidence of infection with pathogens transmitted commonly through food—10 states, 2008. Morbidity and Mortality Weekly Report. 2009;58(13):333–337.
  88. Weimer JR. Many elderly at nutritional risk. USDA Food Review. 1997;20(1):42–48.
  89. Weindruch R, Sohal RS. Seminars in medicine of the Beth Israel Deaconess Medical Center: Caloric intake and aging. New England Journal of Medicine. 1997;337(14):986–994. [PMC free article: PMC2851235] [PubMed: 9309105]
  90. Weindruch R, Walford RL. Dietary restriction in mice beginning at 1 year of age: Effect on life-span and spontaneous cancer incidence. Science. 1982;215(4538):1415–1418. [PubMed: 7063854]
  91. Weisskopf MG, Jain N, Nie H, Sparrow D, Vokonas P, Schwartz J, Hu H. A prospective study of bone lead concentrations and death from all causes, cardiovascular diseases, and cancer in the Department of Veteran Affairs Normative Aging Study. Circulation. 2009;120(12):1056–1064. [PMC free article: PMC2760410] [PubMed: 19738141]
  92. Willett WC, Dietz WH, Colditz GA. Guidelines for healthy weight. New England Journal of Medicine. 1999;341(6):427–434. [PubMed: 10432328]
  93. Woodmansey EJ. Intestinal bacteria and ageing. Journal of Applied Microbiology. 2007;102(5):1178–1186. [PubMed: 17448153]
  94. Wu D, Han SN, Meydani M, Meydani SN. Effect of concomitant consumption of fish oil and vitamin E on T cell-mediated function in the elderly: A randomized double-blind trial. Journal of the American College of Nutrition. 2006;25(4):300–306. [PubMed: 16943451]
  95. Wysocki CJ, Gilbert AN. National Geographic smell survey. Effects of age are heterogeneous. Annals of the New York Academy of Sciences. 1989;561:12–28. [PubMed: 2735671]
  96. Zhao T, Zhao P, Doyle MP. Inactivation of Salmonella and Escherichia coli O157:H7 on lettuce and poultry skin by combination of levulinic acid and sodium dodecyl sulfate. Journal of Food Protection. 2009;72(5):928–936. [PubMed: 19517717]
  97. Zhu Y, Gu L, Yu J, Yang J, Zhai X, Dong C, Qian H, Tan Z, Pan H, Liu J, Zhu F, Wang H. Analysis on the epidemiological characteristics of Escherichia coli O157: H7 infection in Zuzhou, Jiangsu, China, 1999. Journal of Nanjing Medical University. 2009;23(1):20–24.