Table 2

Risk and frequency of CMV primary infection during pregnancy in the United States.
Ages (years)
 % Seronegative
 Risk among seronegative women/100 pregnancies*
 Risk for all women/100 pregnancies
 No. live-birth pregnancies (100's)†
 No. women with primary infection during live-birth pregnancies
Non-Hispanic White




     12–19
 61.0
 0.15
 0.09
 2320
 209
     20–29
 56.7
 1.38
 0.78
 12140
 9469
     30–39
 49.4
 1.38
 0.68
 9120
 6201
     40–49
 38.9
 1.38
 0.54
 510
 275




     Subtotal


24090
 16154
Non-Hispanic Black




     12–19
 42.6
 7.33
 3.12
 1330
 4150
     20–29
 17.8
 3.40
 0.61
 3060
 1867
     30–39
 13.4
 3.40
 0.46
 1350
 621
     40–49
 5.3
 3.40
 0.18
 80
 14




     Subtotal


5820
 6652
Mexican American




     12–19
 30.1
 2.21
 0.67
 1220
 817
     20–29
 17.5
 3.85
 0.67
 3990
 2673
     30–39
 10.5
 3.85
 0.40
 1700
 680
     40–49
 6.8
 3.85
 0.26
 100
 26




     Subtotal


7010
 4196
Total


36940
 27002

*Risk is computed as 100* [1-exp(-rate × time)], where rate is force of infection per 100 women per year (0.2/100 and 1.8/100 for NH-White, 9.9/100 and 4.5/100 for NH-Black, and 2.9/100 and 5.1/100 for Mexican American) and time is duration of pregnancy in years, i.e., 40/52 = 0.77 years. †From National Vital Statistics Report, Vol. 49, No. 4, June 6, 2001 [17].

Colugnati et al. BMC Infectious Diseases 2007 7:71   doi:10.1186/1471-2334-7-71