YERSINOSIS
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Yersinia are classified as gram-negative
bacteria (bacteria that do not accept the color of a stain in a Gram
stain test, which indicates the general chemical nature of the cell
wall of the bacteria); they have a variety of appearances, and are
therefore called pleomorphic. They belong to Enterobacteriacae, the
large group of organisms that inhabit the intestinal tract. There
are many different subtypes of Yersinia.
They are found worldwide and have been isolated from soil, fresh
water, contaminated foods, and many wild and domestic animals. For
reasons not entirely clear, disease caused by these organisms occurs
more frequently in areas of northern Europe, especially Scandinavia.
Infection, particularly in children ages one through four years, is
quite common, though often these infections produce few symptoms.
Studies have shown that infection with these bacteria is almost as
common as that with Shigella or Campylobacter. |
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