Skip to main content

Table 1 Seasonal distribution of A. phagocytophilum and Rickettsia spp. infected ticks collected in Hanover, Germany, in 2015

From: A 10-year surveillance of Rickettsiales (Rickettsia spp. and Anaplasma phagocytophilum) in the city of Hanover, Germany, reveals Rickettsia spp. as emerging pathogens in ticks

  April May June July August September October Total
Anaplasma phagocytophilum a
 Adults 4/95 (4.2) 5/97 (5.2) 6/95 (6.3) 16/80 (20.0) 2/75 (2.7) 2/72 (2.8) 6/59 (10.2) 41/573 (7.2)*
 Adult males 2/53 (3.7) 3/48 (6.3) 2/51 (3.9) 5/42 (11.9) 1/37 (2.7) 0/28 (0) 1/27 (3.7) 14/285 (4.9)*
 Adult females 2/43 (4.7) 2/49 (4.1) 4/44 (9.1) 11/38 (28.9) 1/38 (2.6) 2/44 (4.5) 5/32 (15.6) 27/288 (9.4)*
 Nymphs 0/205 (0) 0/203 (0) 3/205 (1.5) 20/220 (9.1) 4/225 (1.8) 3/228 (1.3) 8/241 (3.3) 38/1527 (2.4)*
 Total 4/300 (1.3)§ 5/300 (1.7)§ 9/300 (3.0)§ 36/300 (12.0)§ 6/300 (2.0)§ 5/300 (1.7)§ 14/300 (4.7)§ 79/2100 (3.8)
Rickettsia spp.a
 Adults 33/95 (34.7) 47/97 (48.5) 35/95 (36.8) 55/80 (68.8) 53/75 (70.7) 50/72 (69.4) 37/59 (62.7) 310/573 (54.1)
 Adult males 18/52 (34.6) 24/48 (50.0) 18/51 (35.3) 28/42 (66.7) 23/37 (62.2) 21/28 (75.0) 12/27 (44.4) 144/285 (50.5)
 Adult females 15/43 (34.8) 23/49 (46.9) 17/44 (38.6) 27/38 (71.1) 30/38 (78.9) 29/44 (65.9) 25/32 (78.1) 166/288 (57.6)**
 Nymphs 79/205 (38.5) 81/203 (39.9) 71/205 (34.6) 133/220 (60.4) 138/225 (61.3) 129/228 (56.6) 125/241 (51.9) 756/1527 (49.5)**
 Total 112/300 (37.3)§§ 128/300 (42.7)§§ 106/300 (35.5)§§ 188/300 (62.7)§§ 191/300 (63.7)§§ 179/300 (59.7)§§ 162/300 (54.0)§§ 1066/2100 (50.8)
  1. aNo. of positive ticks/ Total no. of ticks (%)
  2. *Significantly higher infection rates in adult ticks (females and males) vs nymphs (P ≤ 0.05)
  3. **Significantly higher infection rates in adult females vs nymphs (P ≤ 0.05)
  4. §Significantly higher infection rates in July vs April, May, June, September and October (P ≤ 0.05)
  5. §§Significantly higher infection rates in July, August and September vs April, May and June as well as in October vs April and June (P ≤ 0.05)