TABLE 3.

Prevalence of Borrelia genospecies in I. ricinus ticks feeding on birdsa

Bird speciesStageNo. of infected ticksc/no. tested (%)No. of birds yielding infected ticks/no. tested (%)No. of ticks infected with indicated Borrelia genospeciesb (no. infested with infected ticks)
BGABVABAFBBSSBGA + BVABGA + BAFBVA + BAFBGA + BVA + BAFND
Prunella modularis (dunnock)L2/16 (12.5)1/5 (20)2 (1)
N20/63 (31.7)4/5 (80)7 (4)8 (2)3 (1)2 (2)
Garrulus glandarius (Eurasian jay)L0/1 (0)0/2 (0)
N3/27 (11.1)2/2 (100)1 (1)2 (2)
Coccothraustes coccothraustes (hawfinch)L1/33 (3)1/15 (6.7)1 (1)
N8/44 (18.2)6/15 (40)2 (2)4 (4)2 (2)
Fringilla coelebs (chaffinch)L1/71 (1.4)1/8 (12.5)1 (1)
N1/21 (4.8)1/8 (12.5)1 (1)
Parus major (great tit)L1/40 (2.5)1/24 (4.2)1 (1)
N5/37 (13.5)4/24 (16.7)2 (2)2 (2)1 (1)
Sylvia atricapilla (blackcap)L0/16 (0)0/16 (0)
N1/18 (5.6)1/16 (6.3)1 (1)
Erithacus rubecula (European robin)L0/114 (0)0/23 (0)
N1/24 (4.2)1/23 (4.3)1 (1)
Turdus merula (blackbird)L64/146 (43.8)13/26 (50)29 (6)23 (6)6 (5)6 (2)
N126/38320/26 (76.9)53 (8)38 (15)6 (5)1 (1)16 (3)1 (1)1 (1)1 (1)9 (6)
Turdus philomelos (song thrush)L67/129 (51.9)11/22 (50)27 (8)36 (6)1 (1)3 (3)
N51/181 (28.2)14/22 (63.6)31 (13)8 (2)1 (1)5 (3)1 (1)5 (4)
TotalL136/566 (24)28/141 (19.9)58 (16)61 (13)0 (0)0 (0)7 (6)0 (0)0 (0)0 (0)10 (6)
N216/798 (27.1)53/141 (37.6)97 (31)62 (27)11 (8)1 (1)22 (7)1 (1)2 (2)1 (1)19 (15)
  • a BGA, B. garinii; BVA, B. valaisiana; BAF, B. afzelii; BBSS, B. burgdorferi sensu stricto; ND, not determined; L, larvae; N, nymphs.

  • b In some cases, the sum of Borrelia species infections was greater than the number of infected ticks because of mixed infections.

  • c Number of ticks that tested positive for Borrelia species.