The road to a polio-free Uganda; contribution of the Expanded Program on Immunization Laboratory (EPI-LAB) at Uganda Virus Research Institute

Afr Health Sci. 2023 Sep;23(3):186-196. doi: 10.4314/ahs.v23i3.23.

Abstract

Background: The control of poliomyelitis in Uganda dates back as far as 1950 and acute flaccid paralysis (AFP) surveillance has since been used as a criterion for identifying wild polioviruses. Poliovirus isolation was initially pursued through collaborative research however, in 1993, the Expanded Program on Immunization Laboratory (EPI-LAB) was established as a member of the Global Poliovirus Laboratory Network (GPLN) and spearheaded this activity at Uganda Virus Research Institute.

Objectives: The aim of this report is to document the progress and impact of the EPI-LAB on poliovirus eradication in Uganda.

Methods: Poliovirus detection and identification were achieved fundamentally through tissue culture and intra-typic differentiation of the poliovirus based on the real-time reverse transcriptase polymerase chain reaction (rRT PCR). The data obtained was entered into the national AFP database and analysed using EpiInfoTM statistical software.

Results: Quantitative and qualitative detection of wild and Sabin polioviruses corresponded with the polio campaigns. The WHO target indicators for AFP surveillance were achieved essentially throughout the study period.

Conclusion: Virological tracking coupled with attaining standard AFP surveillance indicators has been pivotal in achieving and maintaining the national wild polio-free status. Laboratory surveillance remains key in informing the certification process of polio eradication.

Keywords: Poliovirus; Uganda; acute flaccid paralysis; eradication; laboratory surveillance.

MeSH terms

  • Humans
  • Immunization
  • Poliomyelitis* / epidemiology
  • Poliomyelitis* / prevention & control
  • Poliovirus* / genetics
  • Population Surveillance
  • Uganda / epidemiology
  • alpha-Fetoproteins

Substances

  • alpha-Fetoproteins