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Volume 13, Number 4—April 2007

Letter

Toxoplasma gondii Prevalence, United States

Jeffrey L. Jones*Comments to Author , Deanna Kruszon-Moran†, and Marianna Wilson*
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †Centers for Disease Control and Prevention, Hyattsville, Maryland, USA;

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Table

Comparison ofToxoplasma gondii IgG antibody seroprevalence, NHANES 1999–2000 and NHANES III (1988–1994)*†

NHANES 1999–2000 NHANES III (1988–1994)
N‡ Prevalence 95% CI N‡ Prevalence 95% CI
Total 4,234 14.3 12.3–16.2 11,132 16.0 14.5–17.5
Sex
Male 2,013 15.2 12.4–18.0 5,144 16.7 14.8–18.6
Female 2,221 13.4 11.2–15.5 5,988 15.3 13.5–17.0
Race/ethnicity
Non-Hispanic white 1,293 10.8 8.1–13.6 3,304 14.3 12.5–16.2
Non-Hispanic black 1,027 16.8 13.4–20.3 3,674 18.0 16.1–19.8
Mexican American 1,553 14.2 10.1–18.4 3,661 18.3 16.7–20.0
Age group, y
12–19 2,105 7.3 4.7–10.0 2,749 8.5 6.4–10.5
20–29 735 11.9 9.5–14.4 3,100 15.2 12.1–18.3
30–39 726 17.0 12.9–21.2 2,960 16.1 14.6–17.6
40–49 668 18.7 15.0–22.3 2,323 22.2 19.4–25.0
Country of birth
United States 3,211 10.5 8.3–12.8 8,606 14.1 12.7–15.5
Not United States 995 32.0 24.0–39.9 2,493 27.9 24.1–31.7

*IgG, immunoglobulin G; NHANES, National Health and Examination Survey; CI, confidence interval.
†Sex, race/ethnicity, and total values are age-adjusted to the 2000 census–estimated population using the 4 age categories shown.
‡Totals for the race/ethnicity and country-of-birth categories do not add up to the total number because of an “other” category (not shown)
or because persons did not provide a response to country-of-birth questions.

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