From your link:
http://dailyindependentnig.com/2014/04/nigerian-labs-cant-detect-ebola/
He said, “We do not have any laboratory or facility in the country that can even diagnose Ebola, which also bears similarities with other haemorrhagic fevers like Lassa and Dengue.
Then how, pray tell, are your patients testing negative?? Am I missing something here?