Table 4.

Relative abundance of, and prevalence of B. burgdorferi or Anaplasma spp. infection in, D. occidentalis versus I. pacificus nymphs and adults collected by flagging low vegetation (adults) or dragging the forest floor^a (nymphs) in the James-II woodland, Hopland area, California, 2009–2010.

Tick species by stage (nb)	Season and yearc	Number of ticks collectedd	Mean number ticks per hour ± S.D. (range)	Number of ticks PCR-positive/number tested (percentage positive)
				B. burgdorferi	Anaplasma spp.
D. occidentalis
Adults (8)	spring 2009	46 (19m, 27f)	5.6 ± 5.8 (1–19)	0/46	1/46 (2.2)e
Adults (8)	winter 2009–10	3 (1m, 2f)	0.4 ± 0.5 (0–1)	0/3	0/3
Nymphs (4)	summer 2009	39	9.8 ± 11.3 (0–20)	1/38 (2.6)	0/38
I. pacificus
Adults (8)	spring 2009	20 (13m, 7f)	2.5 ± 2.6 (0–8)	0/20	0/20
Adults (8)	winter 2009–10	51 (25m, 26f)	6.4 ± 4.4 (2–14)	1/51 (2.0)	0/51
Nymphs (4)	spring 2009	423	105.8 ± 54.8 (48–156)	5/50 (10.0)	0/50
Nymphs (4)	summer 2009	24	6.0 ± 6.7 (2–16)	2/24 (8.3)	0/24

^aPrimarily leaf litter, though wood (e.g., logs) occasionally was sampled.

^bNumber of hours spent dragging or flagging.

^cSampling for D. occidentalis and I. pacificus adults was performed on 24 May and 7 June 2009 and on 16 and 31 January 2010; for D. occidentalis nymphs on 19 July 2009; and for I. pacificus nymphs on 24 May and 19 July 2009. The collection and test results for the D. occidentalis adults in spring 2009 and for the I. pacificus adults in winter 2009–2010 were combined because the 2 sampling occasions during each of those seasons were separated by only 2 weeks.

^dm, male; f, female.

^eSequenced as A. bovis.