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Tick surveillance data sets						Print
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										Blacklegged tick (*Ixodes scapularis*) and western blacklegged tick (*Ixodes pacificus)* by county in the contiguous United States
Counties classified as “established” are those where six or more ticks of a single life stage or more than one life stage of the tick were collected in the county within a 12-month period.
Counties classified as “reported” are those where less than six ticks of a single life stage were collected in the county within a 12-month period.
Counties classified as “no records” should not be interpreted as the tick being absent. No records could be a result of a lack of sampling efforts, tick collections, or a lack of reporting or publishing the results of sampling efforts.Established and reported records of *I. pacificus* and *I. scapularis* through Dec. 31, 2022 [XLS – 795 KB]––Right–click the link and select “save”.
Tickborne pathogens identified in host-seeking blacklegged and western blacklegged (*Ixodes* species) ticks: Status by county in the United States
2021 Update: Pathogens included in dataset:
*Borrelia burgdorferi*sensu stricto
*Borrelia mayonii*
*Borrelia miyamotoi*
*Anaplasma phagocytophilum*
*Ehrlichia muris eauclairensis*
*Babesia microti*
Powassan virus
Counties classified as “present” are those where indicated tickborne pathogens have been identified in one or more host-seeking *Ixodes scapularis* or *Ixodes pacificus* ticks, using pathogen species-specific molecular methods.
Counties classified as “no records” should not be interpreted as the pathogen being absent. No records could be a result of a lack of sampling efforts, tick collections, pathogen testing in collected ticks, or a lack of reporting or publishing the results of sampling efforts.Established and reported records of *Borrelia burgdorferi*sensu stricto or*Borrelia mayonii* through Dec. 31, 2022 [XLS – 587 KB]––Right–click the link and select “save”.
							
					
							Last Reviewed:  December 20, 2023						Source: 	Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Vector-Borne Diseases (DVBD)
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