Researchers find first evidence of acquired immunity to rabies
American scientists studying remote communities in the Peruvian Amazon ravaged by vampire bats have found the first evidence of humans immune to rabies.
The team from the US government’s Centers for Disease Control and Prevention (CDC) found that six of 63 people tested had rabies anti-bodies in their blood, without ever having been vaccinated for the disease…
It remains unclear whether the six were born with the anti-bodies or developed them after being infected with rabies and surviving despite the lack of medical facilities in villages rarely visited by doctors.
Either way, the discovery, revealed in this month’s American Journal of Tropical Medicine and Hygiene, turns on its head the traditional notion that without immediate treatment, exposure to rabies means a certain hideous death.
Amy Gilbert, the lead researcher, said that death was still the nearly inevitable fate for anyone developing rabies symptoms, even with the best medical care. However, the new research indicates that some people exposed to the disease may never develop those symptoms…
The CDC discovery is now expected to pave the way for pioneering research to develop both new kinds of vaccinations and treatment for rabies. That could even involve genome sequencing.
Astounding. Though I’m never surprised at what genetic changes may resolve themselves in isolated communities. The likelihood of useful mutations, adaptations, evolved changes is pretty small given the possible short timespan involved.