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Description:This transmission electron microscopic (TEM) image revealed the presence of numerous coronavirus virions in this tissue sample. Coronavirus is a member of the virus family, Coronaviridae, which at their core contain a positive-sense single-stranded RNA genome ((+) ssRNA). Under electronmicrographic examination, the envelope surrounding each virion is studded with a “corona” of points, hence the derivation of its name, which are actually proteinaceous in nature, and are outcroppings of its envelope's molecular structure.

Coronaviruses infect mammals and birds with upper respiratory and gastrointestinal illnesses. The most well-known member of this virus family is the human coronavirus responsible for causing severe acute respiratory syndrome (SARS).
The SARS corona virus, or SARS-CoV, was first reported in Asia in February 2003. Over the next few months, the illness spread to more than two dozen countries in North America, South America, Europe, and Asia before the SARS global outbreak of 2003 was contained. This fact sheet gives basic information about the illness and what CDC has done to control SARS in the United States.

Symptoms of SARS

In general, SARS begins with a high fever (temperature greater than 100.4°F [>38.0°C]). Other symptoms may include headache, an overall feeling of discomfort, and body aches. Some people also have mild respiratory symptoms at the outset. About 10 percent to 20 percent of patients have diarrhea. After 2 to 7 days, SARS patients may develop a dry cough. Most patients develop pneumonia.

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Content Providers(s):CDC/ Dr. Fred Murphy
Creation Date:1975
Photo Credit:
Links:CDC – Severe Acute Respiratory Syndrome (SARS)
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.