Immunological studies in haemophilic children

Area of Science:

• Immunology
• Hematology
• Virology

Background:

• Haemophiliacs receiving large-pool plasma products face exposure to human immunodeficiency virus (HIV).
• The specific risk of HIV infection for haemophiliacs in South Africa was previously unknown.

Purpose of the Study:

• To assess the risk of HIV infection in children with congenital coagulation disorders in South Africa.
• To investigate the association between specific plasma product treatments and HIV infection markers.

Main Methods:

• Studied 39 children with congenital coagulation disorders at a South African Haemophilia Clinic.
• Analyzed treatment history, focusing on local vs. imported, non-heat-treated commercial plasma concentrates.
• Assessed immune status via absolute lymphocyte counts and OKT4/OKT8 ratios.
• Screened for HIV antibodies.

Main Results:

• Two of 38 tested children had high HIV antibody titres.
• Both HIV-positive children received imported, non-heat-treated commercial plasma concentrates.
• Reduced OKT4/OKT8 ratios were observed in 9 children, including 2 who received commercial concentrates.
• One HIV-positive child exhibited symptoms of AIDS-related complex.

Conclusions:

• Haemophiliacs treated with non-heat-treated commercial plasma concentrates may have an elevated risk of HIV infection.
• Local plasma product use appears to be associated with a lower risk of HIV exposure in this cohort.