CDC: MERS virus spread in US, but 2nd man not sick

May 18, 2014 by Mike Stobbe
MERS-CoV particles as seen by negative stain electron microscopy. Virions contain characteristic club-like projections emanating from the viral membrane. Credit: Centers for Disease Control and Prevention

Health officials reported Saturday what appears to be the first time that a mysterious Middle East virus has spread from one person to another in the United States.

The Illinois man probably picked up an infection from an Indiana man who earlier this month became the first U.S. case of Middle East respiratory syndrome, or MERS. The Illinois man, however, never needed medical treatment and is reported to be feeling well, officials at the Centers for Disease Control and Prevention said.

The two men met twice before the Indiana man fell ill and was hospitalized in Munster, Indiana, shortly after traveling from Saudi Arabia, where he lived and was employed as a worker. Health officials say they think the spread during a 40-minute business meeting that involved no more contact than a handshake.

"We don't think this changes the risk to the general public," which remains low, said Dr. David Swerdlow of the CDC.

The new report also is not considered evidence that the virus is spreading more easily among people than previously thought, he said. The virus is not considered to be highly contagious, and health officials believe it only spreads from person to person with close contact. Many of those who have gotten sick in the Middle East have been family members or caring for a MERS patient.

The CDC said tests completed Friday provided evidence that the Illinois man had an infection at some point. Since the first man's diagnosis, have been monitoring and testing anyone who was in close contact with him, including health care workers and household members, but none of the rest of them has tested positive for the virus.

A second U.S. illness was confirmed last week in a 44-year-old man from Saudi Arabia who was visiting Florida.

Saudi Arabia has been at the center of an outbreak of MERS that began two years ago. The MERS virus has been found in camels, but officials don't know how it is spreading to humans. Overall, about 600 people have had the respiratory illness, and about 175 people have died. All had ties to the Middle East region or to people who traveled there. There is no vaccine or cure and there's no specific treatment except to relieve symptoms, which include fever, cough and shortness of breath. Not all those exposed to the virus become ill.

MERS belongs to the coronavirus family that includes the common cold and SARS, or severe acute respiratory syndrome, which caused some 800 deaths globally in 2003.

Explore further: First US MERS patient could leave hospital soon (Update)

More information: www.cdc.gov/coronavirus/mers/index.html

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