A presidential aide in Sierra Leone told AFP yesterday that soldiers would "deter relatives and friends of Ebola patients from forcefully taking them from hospitals without medical consent".
Ebola, a deadly tropical virus that causes severe fever and, in the worst cases, unstoppable bleeding, has claimed the lives of almost 900 people in four west African nations since the start of the year.
Sierra Leone has seen 646 cases, the highest number of any nation, and 273 deaths.
Many indigenous people living in the forested border areas that straddle Sierra Leone, Liberia and Guinea believe the virus was introduced deliberately by outsiders, or is a hoax fabricated by the West, designed to subjugate them.
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The presidency did not give exact numbers or locations for the army deployment, but most of the country's Ebola clinics are in Kailahun and Kenema, the eastern districts hit hardest by the outbreak.
"The safety of our customers, crew and ground teams is always our top priority and we will keep the routes under constant review in the coming weeks," it said in a statement.
The threat of a spread outside of Africa was underlined as Saudi Arabia said doctors were testing a patient suspected of having contracted Ebola during a trip to Sierra Leone.
The health ministry said the Saudi man was admitted to hospital in the Red Sea city of Jeddah after showing Ebola-like symptoms upon his return.
They were named as Spanish priest Miguel Pajares, 75, Chantal Pascaline Mutwamene of Congo and Paciencia Melgar of Equatorial Guinea.