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Lyme disease


Lyme disease is an infection caused by the corkscrew-shaped bacteria Borrelia burgdorferi that is transmitted by the bite of deer (Ixodes scapularis) and western black-legged (Ixodes pacificus) ticks. On the Pacific Coast, the bacteria are transmitted to humans by the western black-legged tick.

Disease Reporting

Health care providers and clinical laboratories are required by law to report cases and suspect cases of lyme disease to local health departments within one working day of identification.

Disease reporting form (pdf) for health-care practitioners

See our disease reporting page for information on how to report and for telephone numbers of local health departments.

For county health departments:

Lyme disease: Investigative guidelines (pdf)
Lyme disease:Case Report form (pdf)
Lyme Disease: CDC Rickettsial-Tickborne Diseases (pdf) case report form


Lyme disease statistics (pdf)  from the 2013 Communicable Disease Summary.

See Also
The CDC fact sheet  answers some common questions about Lyme Disease.

CDC Vaccine Information Statements (English only)

CDC Vaccine Information Statements in other languages from the Immunization Action Coalition