Canada's deputy chief public health officer said in a release that tests at the Public Health Agency of Canada's National Microbiology Laboratory confirmed the ill man does not have Ebola or any of three other hemorrhagic fevers — Lassa, Marburg or Crimean Congo virus.
Dr. Gregory Taylor's statement said ruling out those four hemorrhagic viruses "significantly reduces the risk to the people who have been in close contact with the patient while the patient has exhibited symptoms."
Taylor added there has never been a confirmed case of a hemorrhagic virus in Canada, and that testing continues to determine the man's illness.
George Sharpe, chief geologist at Global Geological Services Ltd. in Saskatoon, identified the sick man as his business partner, Rod Ogilvie.
"He got this assignment in Africa... He wanted his own project and it was just him that was required," Sharpe told Saskatoon radio station CKOM.
"It was pretty routine. He just went over to supervise an iron ore project. He has done it many times before, he has been in Africa before, so it is nothing new to him."
Sharpe said Ogilvie went to the west African country of Liberia in February and came back in the middle of March.
"He was aware, as we all are, that anybody can catch these kinds of illnesses. There is no perfect way to prevent them... He was always advising me 'when you go to the tropics, Ghana or whatever, absolutely you have to take your malaria pills religiously, take your insect repellent, watch what you eat and he was always very careful about that,'" Shape said.
"What he got was just something by pure chance more than likely. Certainly he wasn't the type of person who would ever take a chance on catching anything like that."
There is fear an outbreak of the Ebola virus has spread to Liberia, where the man was travelling.
Dr. Denise Werker, the province's deputy chief medical health officer, said Tuesday that Ogilvie remains in critical condition and his organs are failing.
Sharpe said his partner has had Dengue fever before.
"Dangue hemorrhagic fever occurs when you get a second infection of Dangue virus caused by an autoimmune phenomena," Werker said.
Ogilvie is isolated in a special hospital room where air only moves in and not out. Until they know what illness he is suffering from doctors working directly with the patient are taking extra precaution.
"That means they'd be wearing goggles and masks, gowns and boots," said Werker.
African health officials have said an outbreak of Ebola is believed to have killed at least 59 people in Guinea and may already have spread to neighbouring Liberia, where health officials said they are investigating five deaths after several people crossed the border from Guinea in search of medical treatment.
— With files from CKOM