Lyme borreliosis (LB) is the most common tick-borne zoonosis in northern hemisphere, but in Portugal, despite being a notifiable disease it remains under-diagnosed and reported. This emerging disease is caused by Borrelia burgdorferi sensu lato complex spirochetes, transmitted through the bite of infected Ixodes genus ticks, particularly I. ricinus, the main vector in Europe. Several vertebrates serve as hosts ...