Tick abundance, pathogen prevalence, and disease incidence in two contrasting regions at the northern distribution range of Europe

Parasites & Vectors

Table 2 The abundance of Ixodes ricinus ticks per 20 m² from flagging in two regions differing in incidence of tick-borne diseases; ‘east’ (Akershus and Østfold) and ‘west’ (Sogn & Fjordane) in Norway. We report full samples sizes, while only transects flagged all years were considered and restricted to below 200 masl to ease comparison of densities across areas

Region	Year	Nymphs			Adult males			Adult females
Region	Year	n ^b	Mean^a	SD^a	n ^b	Mean^a	SD^a	n ^b	Mean^a	SD^a
‘East’ (Akershus and Østfold)	2014	199	0.58	4.26	19	0.04	0.22	14	0.02	0.13
	2015	577	1.86	1.06	58	0.21	0.66	49	0.18	0.62
	2016	412	1.63	2.63	54	0.21	0.60	42	0.17	0.48
	All	1188	1.36	3.00	131	0.16	0.54	105	0.12	0.46
‘West’ (Sogn & Fjordane)	2009	1961	8.29	15.12	101	0.42	1.06	99	0.40	0.90
	2010	1925	8.08	16.31	83	0.33	0.64	84	0.33	0.73
	2011	1408	5.95	13.23	57	0.27	1.93	33	0.15	0.50
	2012	1701	6.80	11.12	49	0.19	0.53	53	0.21	0.63
	2013	666	2.87	6.78	24	0.12	0.43	26	0.12	0.46
	2014	750	3.20	6.05	33	0.14	0.41	24	0.09	0.31
	2015	1195	5.54	15.33	32	0.14	0.55	40	0.17	0.80
	2016	1313	5.39	9.73	53	0.25	0.86	43	0.19	0.56
	All	10,919	5.78	12.41	432	0.23	0.94	402	0.21	0.64