''Borrelia burgdorferi'' is a species of [[Borrelia species - Overview|''Borrelia'' bacteria]]. ''Borrelia'' species are longer, wider, helical [[Spirochaetes species - Overview|spirochaetes]].
''Borrelia burgdorferi'' is a species of [[Borrelia species - Overview|''Borrelia'' bacteria]]. ''Borrelia'' species are longer, wider, helical [[Spirochaetes species - Overview|spirochaetes]].
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The ''Borrelia burgdorferi'' sensu lato complex is the cause of '''[[Lyme disease]]'''. The complex comprises three major species:
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The ''Borrelia burgdorferi'' sensu lato complex is the cause of '''[[Lyme disease]]'''.
*''Borrelia burgdorferi'' sensu stricto, the most common cause of canine Lyme disease in the USA.
*''Borrelia burgdorferi'' sensu stricto, the most common cause of canine Lyme disease in the USA.
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*''[[Borrelia garinii]]'' which, with ''B. afzelii'', is the most common cause of Lyme disease in Europe.
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*''[[Borrelia afzelii]]''
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The ''Borreliae'' bacteria multiply in the blood stream of susceptible hosts and disseminate throughout the body. They can localise in joints, brain, nerves, eyes and heart.
The bacteria are reported to infect humans, dogs, horses, cattle, sheep.
The bacteria are reported to infect humans, dogs, horses, cattle, sheep.