| Summary: | Tick-borne pathogens (TBPs) are considered zoonotic re-emerging pathogens, with ticks playing important roles in their transmission and ecology. Previous studies in South Korea have examined TBPs residing in ticks; however, there is no phylogenetic information on TBPs in ticks parasitizing native Korean goat (NKG; <i>Capra hircus coreanae</i>). The present study assessed the prevalence, risk factors, and co-infectivity of TBPs in ticks parasitizing NKGs. In total, 107 hard ticks, including <i>Haemaphysalis longicornis</i>, <i>Ixodes nipponensis</i>, and <i>Haemaphysalis flava</i>, were obtained from NKGs in South Korea between 2016 and 2019. In 40 tested tick pools, genes for four TBPs, namely <i>Coxiella</i>-like endosymbiont (CLE, 5.0%), <i>Candidatus</i> Rickettsia longicornii (45.0%), <i>Anaplasma bovis</i> (2.5%), and <i>Theileria luwenshuni</i> (5.0%) were detected. <i>Ehrlichia</i>, <i>Bartonella</i> spp., and severe fever with thrombocytopenia syndrome virus were not detected. To our knowledge, this is the first study to report CLE and <i>T. luwenshuni</i> in <i>H. flava</i> ticks in South Korea. Considering the high prevalence of <i>Candidatus</i> R. longicornii in ticks parasitizing NKGs, there is a possibility of its transmission from ticks to animals and humans. NKG ticks might be maintenance hosts for TBPs, and we recommend evaluation of the potential public health threat posed by TBP-infected ticks.
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