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Until now none of these three West african countries had experienced ever an Ebola outbreak let alone cases involving a type of Ebola virus that had been found only in faraway Central africa.

Ebola virus: 5 Things You Should Know In a new article published today (July 31) in the journal PLOS Neglected Tropical Diseases Bausch

The virus causing this outbreak is the deadliest type of Ebola virus. The Ebola virus has five species

and each species has caused outbreaks in different regions. Experts were surprised to see that instead of the Taã Forest Ebola virus which is found near Guinea it was the Zaire Ebola virus that is the culprit in the current outbreak.

This virus was previously found only in three countries in Central africa: the Democratic republic of the congo the Republic of the Congo and Gabon.

Zaire Ebola virus is the deadliest type of Ebola virus in previous outbreaks it has killed up to 90 percent of those it infected.

But how did the Zaire Ebola virus get to Guinea? Few people travel between those two regions

If Ebola virus was introduced into Guinea from afar the more likely traveler was a bat he said.

Even if the Ebola virus had been circulating in Guinea for some time animals carrying the virus or other pathogens are not usually in the vicinity of humans

This increases people's risk of exposure to Ebola virus in remote corners of the forest he added.

It is possible that drier conditions somehow influence the number or proportion of bats infected with the Ebola virus or the frequency of human contact with them.

and which earlier this year lost track of 22 vials containing harmless Ebola-virus genetic material.

It includes the Zaire strain of Ebola virus that is currently spreading across West Africa as well as the Sudan strain and the Marburg virus a virus in the same family as Ebola

which showed good protection in nonhuman primates against the Zaire Ebola virus. Currently the vaccine is being developed with the help of Peter Jahrling at the Integrated Research Facility at the NIH

The experimental therapy that humanitarian aid workers Kent Brantly and Nancy Writebol received was purified based on a monoclonal antibodies from mice genetically engineered to produce humanlike antibodies against the Ebola virus.