Seasonal patterns and spatial variation of Borrelia burgdorferi (sensu lato) infections in Ixodes ricinus in the Netherlands

Table 3 Total DON, NIP and DIN per year and location (over 200 m² and multiple sessions)

Location	Year	2009	2010	2011	2012	2013	2014	2015	2016	Total
Bilthoven	DON	46	64	129	45	156	46	162	73	721
	NIP	0.26	0.18	0.15	0.05	0.08	0.02	0.08	0.15	0.12
	DIN	12	12	20	2	12	1	13	11	83
Ede	DON	551	315	230	190	320	208	270	215	2,289
	NIP	0.23	0.13	0.16	0.20	0.15	0.15	0.07	0.05	0.14
	DIN	127	40	36	37	49	32	18	10	318
Dronten	DON	99	241	97	62	187	84	48	15	833
	NIP	0.28	0.34	0.45	0.16	0.23	0.23	0.31	0.20	0.29
	DIN	28	82	44	10	44	19	15	3	244
Gieten	DON	334	327	1116	739	908	445	723	179	4771
	NIP	0.20	0.13	0.10	0.07	0.16	0.14	0.10	0.12	0.13
	DIN	66	43	117	55	149	62	71	22	597
Hoog Baarlo	DON	190	217	236	365	622	276	177	275	2,358
	NIP	0.13	0.09	0.09	0.05	0.02	0.03	0.08	0.02	0.06
	DIN	24	20	22	19	9	9	14	5	142
Kwade Hoek	DON	18	68	6	12	17	8	47	0	176
	NIP	0.11	0.25	0.33	0.10	0.25	0.00	0.38	NA	0.25
	DIN	2	17	2	1	4	0	18	NA	43
Montferland	DON	385	411	282	132	485	185	535	256	2,671
	NIP	0.13	0.19	0.19	0.15	0.21	0.10	0.10	0.08	0.14
	DIN	49	76	55	19	102	19	51	20	382
Schiermonnikoog	DON	26	60	47	57	42	27	39	24	322
	NIP	0.17	0.12	0.21	0.13	0.07	0.30	0.18	0.08	0.15
	DIN	4	7	10	7	3	8	7	2	49
Twiske	DON	224	314	207	227	199	253	302	431	2,157
	NIP	0.22	0.17	0.20	0.14	0.08	0.10	0.04	0.12	0.13
	DIN	49	52	41	32	16	25	12	51	272
Vaals	DON	144	131	211	105	120	152	200	111	1,174
	NIP	0.13	0.11	0.06	0.10	0.17	0.08	0.16	0.11	0.11
	DIN	18	15	12	11	21	12	32	12	134
Veldhoven	DON	237	384	660	510	776	493	1144	386	4,590
	NIP	0.14	0.17	0.28	0.19	0.11	0.07	0.14	0.24	0.16
	DIN	33	64	183	95	84	37	160	93	741
Wassenaar	DON	353	499	567	541	576	649	1173	227	4,585
	NIP	0.18	0.23	0.25	0.24	0.21	0.17	0.17	0.20	0.20
	DIN	63	117	140	128	121	107	198	45	910
All Locations	DON	2,607	3,031	3,788	2,987	4,408	2,826	4,820	2,191	2,6658
	NIP	0.18	0.18	0.19	0.14	0.14	0.12	0.12	0.12	0.15
	DIN	464	537	714	421	637	327	584	272	3,925

Total number of nymphs (DON), prevalence (NIP) and estimated number of infected nymphs (DIN) per year and location (over 200 m² and in multiple sessions). Prevalence (NIP) is calculated for each year–location combination by dividing the total number of Borrelia-positive nymphs by the total number of tested nymphs. For Vaals, the DIN and DON are based on a single transect from 2014 onwards because the other transect was not sampled after December 2013

ISSN: 1756-3305