[Hepatitis A seroprevalence in Navarra]

Determine the hepatitis A seroprevalence in Navarra. Because of the improvement in the hygienic-sanitary conditions, we hope to find a decline of the total prevalence.

Population and random sample of Navarra, obtained by stratified sampling with proportional allocation of sex, age, and area of health care: 1,440 individuals over 15 years of age. Detection of total antibodies by enzyme immunoassay of microparticles.

Global seroprevalence: 79.24%. By age: 9.09% (16-19 years), 35.32% (20-29 years), 77.78% (30-39 years), 97.31% (40-49 years), 98.58% (50-59 years), 97.51% (60-69 years), 99.33% (70-79 years) and 100% (>79 years). By gender: 78.76% in men and 79.7% in women. Rural area 82.04% and urban area 75.77%. Areas of health care: Tafalla, 89.06%; Estella, 87.91%; Tudela, 82.88%; northern, 77.22%; Pamplona, 75.05%, and eastern, 70.97%.

The global prevalence is 79.24% and increasing progressively with the age. Greater seroprevalence in rural areas and in people in contact with livestock. Characteristics of the persons with seroprevalence for HAV in Navarra: inhabitant of the average area, of rural area, with average age and in contact with livestock.