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Camels Confirmed as Source of Human MERS Infection

The animals are the Typhoid Mary of Middle East Respiratory Syndrome, infectious disease expert says
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WebMD News from HealthDay

By Steven Reinberg

HealthDay Reporter

WEDNESDAY, June 4, 2014 (HealthDay News) -- Saudi Arabian doctors say they've identified camels as one source of MERS infections in humans.

The scientists report they matched genetic samples from the virus that killed a Saudi man last November to virus samples present in one of nine camels that he owned.

They said the finding, published in the June 5 issue of the New England Journal of Medicine, proves that camels are a source -- but perhaps not the only source -- of the Middle East Respiratory Syndrome (MERS) virus. The illness is contagious, potentially lethal and has been largely confined to the Middle East so far.

There have been two confirmed cases of MERS in the United States. Both involved health care workers who are believed to have been infected in Saudi Arabia become coming to the United States.

The health risk from MERS to the American public is low, U.S. officials have said, because the virus is only passed through close contact.

"This [the Saudi study] confirms what we have been suspecting," said Dr. Marc Siegel, an infectious disease expert and an associate professor of medicine at NYU Langone Medical Center in New York City. "It's been believed that the source of MERS is the camel, but has really not been proven," until now.

"Camels are the Typhoid Mary of MERS," he said. "It is clear, however, that camel-to-human transmission started this thing."

The MERS virus first surfaced in 2012 in the Middle East, where most of the cases have occurred. As of June 4, there have been 681 laboratory-confirmed cases of MERS infection and 204 deaths. Most of those cases have been confined to Saudi Arabia, according to the World Health Organization.

MERS symptoms typically include shortness of breath, coughing and fever. The illness kills about one-quarter of the people who contract the virus, according to U.S. Centers for Disease Control and Prevention.

One-fifth of all MERS cases have occurred among health care workers, CDC officials have said.

The new findings don't mean that camels are the only way a person can contract MERS, Siegel said. "And the new study has no implication in terms of human-to-human transmission," he added.

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