Ixodes ricinus ticks removed from humans in Northern Europe: seasonal pattern of infestation, attachment sites and duration of feeding

Table 4 Attachment duration (> 24 hours) of adult female ticks and nymphs of I. ricinus with respect to age classes of the human hosts

Age class(years)	Total no. (%) of participants	Adult females^a		Nymphs^a
Age class(years)	Total no. (%) of participants	No.	% > 24 h	No.	% > 24 h
19-29	31 (2)	7	57	20	55
30-39	100 (6)	17	76	76	46
40-49	192 (11)	56	61	127	54
50-59	398 (22)	93	60	303	58
60-69	621 (35)	135	61	469	64
70-79	351 (20)	77	58	253	72
>80	77 (4)	25	84	52	75
Total	1770 (100)	410	62	1300	63

^aRemoved adult female ticks and nymphs where calculation of tick attachment time was possible.

ISSN: 1756-3305