I don't think this article is discussing morgellons parasites, but all the other parasites which are being introduced by legal immigrants and illegal aliens. It also discusses the problems found among legal citizens in poorer sections of the US. So no one (yet) seems to be accusing immigrants of introducing morgellons to the world, as morgellons seems to found all over the world. Still with the amount of parasites out there which remain unidentified, it is hard to say that morgellons could not have come from a tropical climate, of which there are many examples in both hemispheres. I think it is time though for the government to quit ignoring the known parasitic diseases which have been introduced into the US in the last few decades by people entering from outside its borders, not just from Mexico but from all over the world. This fact was touched on by this article too. It is frightening as many of the parasites and the diseases being introduced into areas previously free of them are very serious and, similar to morgellons, have no effective medicine for any real cure. The introduction of Chagas disease into US blood supplies, a disease previously unknown in the US, did not come from thin air but is coming from the large numbers of folks entering from the Southern US border:
"Dr. Louis V. Kirchhoff, a Chagas' disease specialist at the University of Iowa's medical school, has estimated that as many as 10 percent of the Mexicans who migrate to the United States are infected."
I do hold those in government responsible for that, as they have allowed people to come here without any sort of health testing which was required in past eras before antibiotics were readily available, but we are returning to those times today as many antibiotics no longer work.
Also many diseases and parasites can be introduced even by those handling food in fields, in stores and in restaurants.
"Infection also may occur via blood transfusion, congenital transmission, organ transplantation, laboratory incident and ingestion of triatomine-tainted food or drink."
It is possible to control borders if any real effort is made. It is possible to send unhealthy people back to countries of origin when applying for entry as was done in the past. It is possible to not allow carriers of disease to handle food (remember the stories of typhoid Mary, a woman of Irish descent). This is how governments could make a partial attempt to keep legal citizens healthier. If such efforts had made perhaps the transport of parasites like Chagas and diseases like the reintroduction of leprosy would be greatly reduced or non-existent today in the US.
BTW, New Mexico has this statistic in the year 2000:
New Mexico had the highest proportion of Hispanics--42 percent. Though how many originate in Mexico is not stated.
Hispanics in New Mexico were 42 percent of the total state population, the highest proportion for any state.