African swine fever is a near-fatal viral disease threatening global pork production today.

Gardening · Published 3 October 2026 Swipe more like this →

In short: With mortality rates reaching 100 percent, African swine fever virus is a devastating threat to domestic pigs and wild boars. First identified in 1921, this complex, resilient pathogen has spread across continents, disrupting national economies and international trade. Scientists are now racing to decode its genome to develop effective vaccines.

African swine fever virus (ASFV) is a large, complex DNA virus and the sole member of the Asfarviridae family. First discovered in Kenya in 1921, the virus is highly stable in the environment, allowing it to persist in contaminated objects, vehicles, and clothing. While domestic pigs and wild boars suffer severe, often fatal outcomes, natural hosts like warthogs and soft ticks of the genus Ornithodoros remain asymptomatic, serving as reservoirs for the disease.

The clinical presentation of the virus varies significantly based on the isolate's virulence. Highly virulent strains can cause sudden death with mortality rates near 100 percent, while moderately virulent strains lead to subacute forms characterized by fever, hemorrhages, and edema. Chronic infections manifest through skin necrosis, arthritis, and respiratory distress. Because the virus modulates host immune responses and inhibits apoptosis, it effectively evades detection, making diagnosis reliant on laboratory testing like PCR or ELISA.

Developing a vaccine remains a significant worldwide challenge due to the virus's complex genome and the lack of understanding regarding its protein functions. However, experimental live attenuated vaccines, such as ASFV-G-∆I177L, have shown promise in clinical trials. By deleting specific virulence genes, researchers have created candidates that remain genetically stable and provide protection against virulent field strains. Despite these advancements, control measures currently depend on rapid surveillance, strict movement restrictions, and the prevention of swill feeding to protect the global pig industry.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Why some pigs survive classical swine fever while others succumb to the virus
• Why the H5N1 virus is considered the world's most significant pandemic threat today
• Why pigs are considered nature's biological mixing vessels for viruses
• Why the flu virus is a master of constant evolutionary reinvention
• The world's most widespread tick-borne viral disease is expanding its reach
• Herpesviruses are ancient, complex masters of cellular persistence that have co-existed with humanity for millennia.
• The 1968 pandemic that redefined how viruses jump across borders
• Why the flu virus is a master of disguise that constantly outsmarts our immunity
• Could human behavior have caused the first documented extinction of a human virus?
• The Aztecs fed their capital from 'floating gardens' that don't actually float.
• The ancient mystery of 'Onyx Marble' was actually a plumbing byproduct
• The desperate physics of rescuing a person from the open sea

More in Viruses · More in Gardening · Latest · A–Z · All topics