4.2 Article

Tick-borne pathogens in ticks from urban and suburban areas of north-western Spain: Importance of Ixodes frontalis harbouring zoonotic pathogens

Journal

MEDICAL AND VETERINARY ENTOMOLOGY
Volume 37, Issue 3, Pages 499-510

Publisher

WILEY
DOI: 10.1111/mve.12648

Keywords

Anaplasma phagocytophilum; Borrelia; Dermacentor; Ixodes; Rhipicephalus; Rickettsia; urban areas

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Ticks were collected and analyzed for the presence of Borrelia spp., Rickettsia spp., and Anaplasma phagocytophilum in urban and suburban areas of Lugo, Spain. The study found that tick abundance was higher in suburban areas, with Ixodes frontalis being the most abundant species. Rickettsia spp. was more prevalent than Borrelia spp., and several species of Rickettsia were identified, including some novel ones.
To identify the questing tick populations in urban and suburban areas from the city of Lugo (NW Spain), ticks were collected monthly by flagging. The presence of Borrelia spp., Rickettsia spp. and Anaplasma phagocytophilum also was determined by polymerase chain reaction (PCR) and sequence analysis. Overall, 342 questing ticks were collected; the tick abundance was higher in suburban (95.9%) than in urban areas (4.1%). Ixodes frontalis was the most abundant (86.5%); 88.5% were larvae, 11.1% nymphs and 0.3% adults. All development stages of I. ricinus (7.3%) and adults of Rhipicephalus sanguineus sensu lato (5.8%) and Dermacentor reticulatus (0.3%) were found. Rickettsia spp. (31.9%) was more prevalent than Borrelia spp. (2.7%); no ticks were positive to A. phagocytophilum. Six Rickettsia species were identified (R. slovaca, R. monacensis, R. massiliae, R. raoultii, R. sibirica subsp. mongolitimonae and R. aeschielmanii); Candidatus Rickettsia rioja and two novel Rickettsia species also were detected. In addition, Borrelia turdi (1.8%) and B. valaisiana (0.9%) were identified in Ixodes ticks. This is the first report of R. slovaca in R. sanguineus s.l. and of R. monacensis, R. raoultii, R. slovaca, R. sibirica subsp. mongolitimonae and Ca. R. rioja in I. frontalis. Since most of the pathogens detected are zoonotic, their presence in these areas may have implications for public health.

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