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The prevalence of Borrelia burgdorferi sensu lato (s.l.), the etiologic agent of
Lyme borrelosis (LB), was determined for the first time in Egypt by using polymerase chain reaction (PCR). Questing 5243 hard and soft ticks were collected from animal farms throughout Giza Governorate. DNA from 500 individual tick species was extracted and PCR was performed. Primers verified from the sequence of German strain Pko of Borrelia afzelii were used. Fragments of 642 bp were generated and sequenced. The prevalence of B. burgdorferi sensu lato (s.l.) was 28% of examined soft and hard ticks. High infection rate (66%) of B. burgdorferi s.l. was observed in both nymph and adult soft ticks Ornithodoros savignyi. Beside, the role of hard ticks as potential vectors of
Lyme disease in Egypt, where the infection rate was between 0.0-50.0%. Sequence analysis of PCR product of Borrelia burgdorferi sensu lato shares high degree of similarity in sequence compared to similar species in GenBank.