There are no muslim countries in all of America because Islam never crossed the Atlantic. read more
Based on other estimates the Muslims in the area of Latin America are 100,000 mainly concentrated in Brazil, El Salvador and Argentina but also there are concentrations in Venezuela, Colombia and Paraguay. read more
Fortunately, until now, South America is immune from Islamic terrorist attack. But the situation is changing and there is suspicion that terrorist groups might penetrate South American countries to spread their reach and plot attack against USA. Edit: The question was about middle and South America and not about middle east. read more
There is no other country farther south. South America is theclosest continent to Antarctica, a continent which has noestablished countries. read more