Prevalence of infection by Borrelia burgdorferi s.l. and spotted fever group (SFG) rickettsiae was estimated in host-seeking ticks in an area in Tuscany, central Italy, where Lyme borreliosis was reported in a forestry worker. B. burgdorferi s.l. was identiÞed by polymerase chain reaction in 16.7% (95% CI=10.3, 24.8) of Ixodes ricinus (L.) nymphs and 39.6% (95% CI=26.5, 54.0) of adults. Borrelia lusitaniae accounted for 82.9% of positive samples, followed by Borrelia garinii (9.8%), Borrelia afzelii (2.4%), and Borrelia burgdorferi s.s. (2.4%). One Rhipicephalus spp. adult was infected with B. garinii (prevalence = 8.3%; 95% CI = 0.21, 38.5). Prevalence of infection by SFG rickettsiae was 38.5% (95% CI=26.7, 51.4) in I. ricinus nymphs, 34.6% (95% CI=22.0, 49.1) in I. ricinus adults, and 50% (95% CI = 21.1, 78.9) in Rhipicephalus spp. adults. Phylogenetic analysis showed the similarity of B. lusitaniae strains that were identiÞed in this study and of a strain that was previously isolated from a human patient in Portugal. Results of this study conÞrm the dominance of B. lusitaniae in areas in the Mediterranean basin and the infection by SFG rickettsiae in I. ricinus.

Borrelia lusitaniae and spotted fever group rickettsiae in Ixodes ricinus (Acari: Ixodidae) in Tuscany, central Italy

BERTOLOTTI, Luigi;TOMASSONE, Laura;TRAMUTA, CLARA;GREGO, Elena;AMORE, GIUSEPPINA;NEBBIA, Patrizia;MANNELLI, Alessandro
2006

Abstract

Prevalence of infection by Borrelia burgdorferi s.l. and spotted fever group (SFG) rickettsiae was estimated in host-seeking ticks in an area in Tuscany, central Italy, where Lyme borreliosis was reported in a forestry worker. B. burgdorferi s.l. was identiÞed by polymerase chain reaction in 16.7% (95% CI=10.3, 24.8) of Ixodes ricinus (L.) nymphs and 39.6% (95% CI=26.5, 54.0) of adults. Borrelia lusitaniae accounted for 82.9% of positive samples, followed by Borrelia garinii (9.8%), Borrelia afzelii (2.4%), and Borrelia burgdorferi s.s. (2.4%). One Rhipicephalus spp. adult was infected with B. garinii (prevalence = 8.3%; 95% CI = 0.21, 38.5). Prevalence of infection by SFG rickettsiae was 38.5% (95% CI=26.7, 51.4) in I. ricinus nymphs, 34.6% (95% CI=22.0, 49.1) in I. ricinus adults, and 50% (95% CI = 21.1, 78.9) in Rhipicephalus spp. adults. Phylogenetic analysis showed the similarity of B. lusitaniae strains that were identiÞed in this study and of a strain that was previously isolated from a human patient in Portugal. Results of this study conÞrm the dominance of B. lusitaniae in areas in the Mediterranean basin and the infection by SFG rickettsiae in I. ricinus.
43(2)
159
165
http://www.bioone.org/doi/abs/10.1603/0022-2585(2006)043%5B0159%3ABLASFG%5D2.0.CO%3B2
Borrelia lusitaniae; spotted fever group rickettsiae; Ixodes ricinus; Rhipicephalus; Italy
BERTOLOTTI L; TOMASSONE L; TRAMUTA C; GREGO E; AMORE G; AMBROGI C; NEBBIA P; MANNELLI A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/41949
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