Immunogenicity to the bivalent HPV-16/18 vaccine among adolescent African students exposed to helminths and malaria

  • Miriam Nakalembe Makerere University, Kampala, Uganda
  • Cecily Banura Makerere University, Kampala, Uganda
  • Proscovia Bazanye Namujju National Institute for Health and Welfare, Oulu, Finland
  • Florence Maureen Mirembe Makerere University, Kampala, Uganda
Keywords: HPV vaccine, immunogenicity, helminths, malaria, Uganda

Abstract

Introduction: Efficacious vaccines that prevent human papillomavirus (HPV) infection, the recognized cause of cervical cancer, are now available. However, in sub-Saharan Africa, immune-modulating infections such as helminths and malaria may affect immunogenicity to the HPV vaccine. This study aimed to evaluate the effect of helminth infections and exposure to malaria on the immune response to the bivalent HPV-16/18 vaccine.

Methodology:AS04-adjuvanted HPV-16/18 vaccinated students between 10 and 16 years of age from western Uganda, at 18 months-post vaccination were followed up for six months. After consent was obtained, demographic data, blood, and stool samples were collected. Multiplex HPV serology technology was used to determine HPV-16/18 antibody levels expressed as median fluorescent intensity (MFI). The malaria antibody immunoassay test was used to detect antibodies to malaria parasites. The Kato-Katz method was used to detect the presence of helminths. HPV-16/18 antibody levels among students exposed to malaria or helminths were compared with those who were not exposed using the Student’s t-test.

Results: A total of 211 students participated in the study. There was no difference between MFI levels to HPV-16/18 antibodies at 18- and 24-month follow-ups among students who were positive and negative to malaria or helminth exposure. There was an increase in HPV-18 MFI antibody levels at month 24 among the students who were positive for malaria at enrolment (p = 0.05).

Conclusions:Immune-modulating parasites (malaria/helminths) were not associated with reduced immune response to the bivalent HPV-16/18 vaccine. The data may support the use of this vaccine in sub-Saharan Africa.

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Author Biographies

Miriam Nakalembe, Makerere University, Kampala, Uganda
Obstetrician/Gynaecologist, Lecturer Department of Obstetrics and Gynaecolgy
Cecily Banura, Makerere University, Kampala, Uganda
Epidemiologist, Senior lecturer, Department of Child Health and Development Center
Florence Maureen Mirembe, Makerere University, Kampala, Uganda
Associate professor, Obstetrician/Gynaecologist, Department of Obstetrics and Gynaecolgy
Published
2015-02-19
How to Cite
1.
Nakalembe M, Banura C, Namujju PB, Mirembe FM (2015) Immunogenicity to the bivalent HPV-16/18 vaccine among adolescent African students exposed to helminths and malaria. J Infect Dev Ctries 9:197-205. doi: 10.3855/jidc.5719
Section
Original Articles