Risk of pregnancy-related hypertension within 5 years of exposure to drinking water contaminated with Escherichia coli O157:H7.
The authors evaluated the risk for pregnancy-related hypertension among previously healthy women who conceived within 5 years of exposure to drinking water contaminated with Escherichia coli O157.H7 in Walkerton, Canada (2000). Chronic hypertension was defined as systolic/diastolic blood pressure >/=140/90 mm Hg before 20 weeks gestation; gestational hypertension was defined as new onset systolic/diastolic blood pressure >/=140/90 mm Hg >/=20 weeks gestation. The incidence of hypertension was compared between women who were asymptomatic during the outbreak to those who experienced acute gastroenteritis. Blood pressure data were available for 135 of 148 eligible pregnancies. The adjusted relative risks for chronic and gestational hypertension were 1.5 (95% confidence interval [CI]: 0.3-7.7) and 1.0 (95% CI: 0.4-2.5), respectively. Mean arterial pressure before 20 weeks gestation was 2.7 mm Hg higher in women who had acute gastroenteritis (95% CI: 0.05-5.4). A trend toward higher chronic hypertension and mean arterial pressure in early pregnancy was observed among women who experienced gastroenteritis after exposure to bacterially-contaminated drinking water.
Moist
Louise
L
Division of Nephrology, Department of Medicine, Victoria Hospital-London Health Sciences Centre, 800 Commissioners Road East, London, Ontario, Canada. louise.moist@lhsc.on.ca
Sontrop
Jessica M
JM
Garg
Amit X
AX
Clark
William F
WF
Suri
Rita S
RS
Gratton
Robert
R
Salvadori
Marina
M
Nevis
Immaculate
I
Macnab
Jennifer J
JJ
D000328:Adult; D001794:Blood Pressure / Q000502:physiology; D002170:Canada; D015331:Cohort Studies; D004196:Disease Outbreaks; D004927:Escherichia coli Infections / Q000150:complications / Q000453:epidemiology / Q000382:microbiology; D019453:Escherichia coli O157; D005260:Female; D005759:Gastroenteritis / Q000150:complications* / Q000382:microbiology*; D006801:Humans; D046110:Hypertension, Pregnancy-Induced / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology; D015994:Incidence; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000453:epidemiology* / Q000209:etiology; D011446:Prospective Studies; D012189:Retrospective Studies; D012307:Risk Factors; D013997:Time Factors; D014871:Water Microbiology