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"Neurocysticercosis" is the term for infection of the nervous
system - usually the brain - with the pork tapeworm; in the U.S.,
it is acquired by eating tapeworm eggs shed in human waste - not by
eating pork from an infected pig. It is endemic in Latin America, Africa, and Asia - but had been extremely uncommon in this country until recently; in the U.S., the main way it is transmitted is by aliens from areas where it endemic working as foodhandlers and not washing their hands when they use the restroom while at work. In non-Moslem countries in the Third World - where pork is a common food, meaning pigs commonly get infected from human waste, cysticercosis is responsible for one-third of epilepsy cases.
Most U.S. cases are in the Southwest and are among immigrants
from Third World areas where the disease is endemic. However, a
1992 Centers for Disease Control report noted that 7.3% of cases in
Los Angeles County were locally-transmitted; these patients were
native-born Americans who had never traveled to countries where the disease is common. Another CDC report, this one in July-September 1997, noted that the disease is increasingly common among Americans who have never left the U.S. The CDC notes that it is responsible for 2% of neurologic hospital admissions in Southern California., producing more than 1,000 cases yearly nationwide. In 2002, the CDC noted that
the brain-damaging worm disease caused 10% of all epilepsy cases in
Los Angeles emergency rooms.
The CDC noted that 3% of migrant farmworkers in North Carolina
who were from Central America were in the infectious stage of the
disease; that CDC report expressed particular concern about such
people working as food handlers or housekeepers - and suggested
that those in these occupations be tested for whether they were
infectious.
Showing both the typical transmission route in the U.S. - and
the risk cysticercosis poses to the general American public - the
CDC noted that food contaminated by immigrant cooks caused an
outbreak of the disease among Orthodox Jews in New York City. The fact that Orthodox Jews don't eat pork didn't prevent them from
getting the disease - nor did their distance from the Mexico
border.
A Texas Dept. of Health report in Aug. 1998 noted among
risk factors "employing a domestic worker from an endemic area" and eating food prepared by a "foodhandler with a tapeworm"; the report elsewhere explicitly blamed the increase in the disease inside the U.S. on immigration.
That Texas Dept. of Health report noted that this disease is
becoming endemic "in parts of the United States having a large
Hispanic population" and that "neurocysticercosis is a major health
problem along the United States-Mexico border."
In late May 2002, another CDC in-house medical journal article reported
transmission of the brain-damaging worm disease inside North Carolina
by infected aliens.