ArticleParasites & vectors2025
Detection of pathogens within Ixodid ticks collected from domestic cats across the USA.
Article in Parasites & vectors, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundIxodid ticks and tick-borne diseases continue to be an emerging health concern in the USA. Companion animals dwell in close proximity with people; therefore, it is important to understand how they might contribute to the maintenance of tick-borne pathogens, especially zoonoses, in the peri-domestic environment. Domestic cats are often overlooked in epidemiological investigations of tick-borne infections compared with their canine counterparts.
methodsThe purpose of this study was to investigate the potential exposure of domestic cats to tick-borne pathogens by molecularly testing adult Ixodid ticks collected from cats that were presented for veterinary care. A total of 802 ticks collected from 512 individual cats were tested by conventional polymerase chain reaction (PCR). Ticks were morphologically identified as Ixodes scapularis (n = 431), Amblyomma americanum (n = 218), and Dermacentor variabilis (n = 153).
resultsThe most prevalent pathogen detected was Borrelia burgdorferi s.s., detected in 19.5% of I. scapularis. Ehrlichia ewingii was detected in 3.2% of A. americanum. Anaplasma phagocytophilum was detected in 0.7% of I. scapularis. Cytauxzoon felis was detected in 0.5% of A. americanum. Borrelia miyamotoi was detected in 0.2% of I. scapularis. Submitting clinics were contacted to gather additional information on cats infested by pathogen-infected ticks. This information did not yield a meaningful relationship between potential pathogen exposure and development of clinical signs around the time of tick collection.
conclusionsThis study is the largest survey for pathogens within Ixodid ticks collected from domestic cats in the USA and the only survey in which retrospective clinical information was retrieved. While the effect of many tick-borne pathogens on feline health remains unclear, this study demonstrates that cats infested with ticks are at risk for pathogen exposure and may be a source for harboring pathogen-infected ticks in and around the home.
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