Elevated hepatitis A and E seroprevalence rates in a Texas/Mexico border community

Area of Science:

• Epidemiology
• Public Health
• Infectious Diseases

Background:

• Viral hepatitis A and E are significant public health concerns, especially in developing regions and border areas.
• Seroprevalence studies are crucial for understanding disease transmission dynamics and informing public health interventions.

Purpose of the Study:

• To determine and compare the seroprevalence of viral hepatitis A and hepatitis E among low-income pregnant women in El Paso, Texas, and Cd Juárez, Mexico.
• To identify demographic and socioeconomic factors associated with hepatitis A and E seropositivity in the study populations.

Main Methods:

• Cross-sectional seroprevalence study involving 557 pregnant women in El Paso and 307 in Cd Juárez.
• Random selection of participants from low-income populations undergoing routine prenatal testing.
• Analysis of blood samples for immunoglobulin G antibodies against hepatitis A virus (anti-HAV) and hepatitis E virus (anti-HEV).

Main Results:

• High seroprevalence rates for hepatitis A were observed: 75.8% in El Paso and 96.1% in Cd Juárez.
• Hepatitis A seroprevalence significantly increased with age and was strongly associated with nationality and ethnicity (Mexican nationals: 96.1%, US Hispanics: 78.8%, US Caucasians: 36.4%).
• Hepatitis E seroprevalence was low (0.4% in El Paso, 1.6% in Cd Juárez).

Conclusions:

• Viral hepatitis A is highly endemic in the studied populations, with significant variations based on age, nationality, and ethnicity.
• The findings highlight the need for targeted public health strategies and vaccination programs for hepatitis A in this border region.
• Hepatitis E appears to be less prevalent, but continued surveillance is warranted.