Legal immigrants that come into the United States are medically screened to protect the residents and citizens of the United States from infectious and deadly diseases. Illegal aliens on the other hand obviously are not and that is the heart of the matter when it comes to a blood borne disease called Chagas.

The American Red Cross screens blood donors and has seen a dramatic rise in the detection of the parasite Trypanosoma cruzi over the past 10 years in the Los Angeles area. In 1996, 1 in 9,850 donors were infected. In 1998, 1 in 5,400 donors were infected. In 2006, the infection rate of donors in the Los Angeles area had went to 1 in 3,800 donors.

This disease is dangerous and threatens the health of all residents of this country.

Los Angeles Times

A little-known but potentially deadly parasite from Latin America has become one of the latest threats to the blood and organ supplies in the United States...

Last year, two heart transplant patients at different Los Angeles hospitals contracted the parasitic disease, called Chagas, causing health authorities to issue a national bulletin. Within months, both patients subsequently died, although not directly from Chagas...

The parasite, which is generally passed to humans from a blood-sucking insect that looks like a striped cockroach, can feed over years on tissues of the heart and gastrointestinal tract. After decades, tissues can be eroded so much that the organs fail.

...

“Curbing illegal entry will diminish the problem of exposure to such diseases because legal immigrants are medically screened to protect the U.S. public,” said Jack Martin, special projects director for the Federation for American Immigration Reform, an immigration control group.

It is estimated that as many as 12 million people in Latin America are infected with the Chagas parasite and that 1 million of them may die if there's not a cure found.

As for America... we are infected with at least 12 million parasites known as illegal aliens and they are eating the heart of this country.