The USF College of Public Health’s Dr. Thomas Unnasch, distinguished university health professor, has been appointed chair of the World Health Organization’s (WHO) Onchocerciasis Technical Advisory Sub-Committee. Unnasch is chair of the Department of Global Health and interim chair of the Department of Environmental and Occupational Health.
The role of the sub-committee is to review and report to the Strategic and Technical Advisory Group for Neglected Tropical Diseases (NTD-STAG) Global Working Group for Monitoring and Evaluation on technical issues relating to the elimination of river blindness in Africa.
Onchocerciasis, commonly known as river blindness, is an eye and skin disease spread by the filarial parasite Onchocerca volvulus, a type of worm that migrates below the skin and the eyes.
The disease is commonly found in inter-tropical zones with about 90 percent of cases occurring in Africa, according to WHO.
“I have been deeply involved in the river blindness elimination effort for most of my career,” Unnasch said. “Chairing the committee will allow me to use my experience to develop practical effective standard operating procedures that the countries will be able to follow to certify that they have eliminated river blindness.”
Unnasch said the committee’s first task will be to prepare a manual of standard operating procedures to assist country program managers in mapping, verification of interruption of transmission, decisions on when to stop mass drug administration, verification of elimination and post elimination surveillance.
According to the Centers for Disease Control and Prevention, river blindness is categorized as a neglected tropical disease—diseases that cause substantial illness for more than one billion people globally, especially among those living in poverty.
The disease spread by the black fly, Similium damnosum and those infected may experience skin rashes, large nodules under the skin—usually indicating the presence of adult worms living below the skin and, eventually, blindness.
Adults infected by Onchocera volvulus may take ivermectrin to destroy the larvae living in the body; however there is no approved treatment for children under five.
“This committee will develop a detailed supplement to the guidelines of the elimination of Onchocerciasis published by WHO in 2015,” he said. “As I was a member of the committee that wrote the original guidelines document, WHO felt that I would be in a good position to help lead the effort to prepare this detailed supplement as well.”
Unnasch will hold this appointment for two years with the option of being re-appointed for an additional two years.
“I hope that the committee will be successful in developing WHO approved methods for the endemic countries to use to map, monitor and certify river blindness elimination, allowing us to meet the WHO goal of eliminating river blindness from the planet by 2025,” he said.
Story by Anna Mayor, USF College of Public Health
Tags: Africa, Department Global Health, leadership, neglected parasitic diseases, Onchocerca volvulus, Onchocerciasis, river blindness, RPRG, Similium damnosum, Thomas Unnasch, tropical infectious diseases, WHO, World Health Organization