Social history of viruses of encephalitis, of which 105 were fatal, were recorded. A new paramyxovirus was discovered in a victim's brain; it was named Nipah virus, after the village where he had lived. The infection was caused by a virus from fruit bats, after their colony had been disrupted by deforestation. The bats had moved to trees nearer the pig farm and the pigs caught the virus from their droppings. Several highly lethal viral pathogens are members of the "Filoviridae". Filoviruses are filament-like viruses that cause viral haemorrhagic fever, and include the Ebola and Marburg viruses. The Marburg virus attracted widespread press attention
Chicken anaemia virus age following horizontal transmission of the virus via the oro-faecal route - is ubiquitous. The virus is very resistant in the environment, making elimination very difficult. The disease/virus has many names including chicken anaemia, blue wing disease, anaemia dermatitis syndrome, chicken/avian infectious anaemia, haemorrhagic aplastic anaemia syndrome, infectious chicken anaemia, chicken infectious anaemia virus and chicken anaemia agent. When this virus was first discovered in 1979, it was named "chicken anemia agent". Clinical signs only occur in chicks less than three weeks of age. During outbreaks of CAV, up to 10% of chicks can die. Signs include a pale comb,