You cannot make even a correlation unless you know the incidence of the virus in Latin America.
And then, to get evidence of origins, you need sequence data, preferably from each case. Then the phylogenetic trees can be built. With enough data, the phylogeny of the virus will reveal the path of its spread across the US.
I do not have the time to look into this, since although Ebola has fallen mostly out of the news (which is a *huge* relief), I am still very busy with it. I would love to be busy with other diseases.
Sequencing would confirm or refute the hypothesis, and I believe I mentioned that.
Ebola may be out of the news, but the outbreak is far from over. Another little coincidence is that with the new Ebola Tsar, the news feeds shut up about it, which made it look like Obama made it go away. It is just an information blackout for the short attention spanned minions.