Hantaviruses in Africa.

Area of Science:

• Virology
• Epidemiology
• Zoonotic Diseases

Background:

• The discovery of indigenous African hantaviruses in 2006 prompted extensive research into their prevalence and potential for human infection.
• Limited data exists on the pathogenicity of African hantaviruses in humans, necessitating further investigation.

Purpose of the Study:

• To summarize the progress in identifying African hantaviruses and understanding hantavirus infections in the continent.
• To present new seroepidemiological and field data from Southern Africa regarding hantavirus presence in humans and animals.

Main Methods:

• Molecular identification of novel hantaviruses in small mammals (rodents, shrews, bats).
• Isolation and cell culture characterization of the Sangassou virus.
• Serological assays (screening and confirmatory) in West African populations.
• Field studies and molecular analysis of small animals in South Africa and Namibia.

Main Results:

• Multiple novel hantaviruses were identified in African small mammals.
• The first African hantavirus, Sangassou virus, was isolated and characterized.
• No hantavirus genetic material was found in African patient specimens.
• Hantavirus antibodies were detected in human populations in West Africa.
• A 1.0% human seroprevalence rate was found in South Africa's Cape Region.
• No molecular evidence of hantavirus was found in small animals from South Africa and Namibia.

Conclusions:

• Ongoing research has led to the molecular identification and characterization of several new hantaviruses in Africa.
• While direct molecular evidence of human infection is lacking, serological data suggests potential human exposure and disease association in Africa.
• Further research is crucial to elucidate the full spectrum of hantavirus circulation, transmission, and disease potential in African populations and their animal reservoirs.