Table 3. Seroprevalence of bufavirus IgG in adult cohorts, by age, in study of global distribution of human protoparvoviruses*.
| Cohort | Age group, y | No. persons | No. (%) bufavirus IgG+ (95% CI) | p value | Mean age, y (range) |
|---|---|---|---|---|---|
| Finland | <40 | 165 | 1 (0.6) (0.0–3.7) | 0.096 | 31.6 (19–39) |
| >40 | 149 | 5 (3.4) (1.2–7.8) | 49.7 (40–79) | ||
| United States | <40 | 38 | 1 (2.6) (0.0–14.7) | 0.731 | 26.4 (18–39) |
| >40 | 46 | 2 (4.3) (0.4–15.3) | 53.5 (40–72) | ||
| Iraq | <40 | 45 | 40 (88.9) (76.1–95.6) | 0.325 | 30.8 (18–39) |
| >40 | 54 | 44 (81.5) (69.0–89.8) | 47.2 (40–60) | ||
| Iran | <40 | 54 | 21 (38.9) (27.0–52.2) | 0.0003 | 30.1 (18–39) |
| >40 | 53 | 39 (73.6) (60.3–83.7) | 55.0 (40–77) | ||
| Kenya | <40 | 52 | 37 (71.2) (57.7–81.8) | 0.890 | 29.5 (18–39) |
| >40 | 65 | 47 (72.3) (60.4–81.8) | 54.3 (40–88) |
*The exact age of 2 adults from Kenya and 10 veterinarians from Finland were not known and they were excluded from the analysis. However, the 2 Kenyans were defined as adults in the overall prevalence calculations on the basis of education and marital status in the questionnaire. All veterinarians were defined as adults on the basis of work-related sample collection site. +, positive.