Table 3.
The 50 Counties With the Highest Babesiosis Rates Among Medicare Beneficiaries, Ages 65 and Older, During 2006–2017
| Number of Babesiosis Cases (Babesiosis Rate per 100 000 Beneficiary-Yearsb) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Countyc,d | State | All Years | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 |
| Totale, | 12 798 (75) | 701 (49) | 568 (40) | 827 (59) | 1031 (75) | 947 (68) | 892 (64) | 794 (56) | 1321 (92) | 1241 (86) | 1728 (118) | 1383 (93) | 1365 (92) | |
| Nantucket | MA | 152 (1089) | a | a | a | a | a | 15 (1337) | 15 (1277) | 23 (1891) | 25 (2005) | 26 (2033) | a | a |
| Dukes | MA | 80 (236) | a | a | a | 12 (496) | a | a | a | 11 (366) | a | a | a | a |
| Barnstable | MA | 1217 (213) | 34 (74) | 48 (105) | 109 (239) | 109 (239) | 121 (266) | 162 (352) | 147 (309) | 206 (421) | 108 (219) | 80 (162) | 53 (105) | 40 (79) |
| Dutchesse,f | NY | 785 (205) | 40 (122) | 34 (105) | 50 (156) | 46 (146) | 56 (179) | 68 (219) | 70 (226) | 107 (343) | 67 (215) | 69 (215) | 71 (217) | 107 (323) |
| Washington | RI | 260 (187) | 23 (220) | a | 20 (191) | 25 (234) | 22 (203) | 20 (180) | a | 28 (236) | 29 (240) | 25 (196) | 23 (173) | 29 (218) |
| Windham | CT | 245 (177) | 16 (126) | 28 (228) | 20 (170) | 16 (140) | 17 (149) | 20 (180) | 15 (135) | 28 (251) | 14 (124) | 24 (212) | 23 (202) | 24 (209) |
| Plymouthe,f | MA | 1114 (177) | a | 14 (31) | 11 (24) | 46 (98) | 51 (107) | 90 (182) | 131 (248) | 166 (296) | 205 (356) | 239 (405) | 105 (174) | 54 (88) |
| Ulstere,f | NY | 367 (151) | a | a | a | a | a | a | a | 11 (55) | 12 (61) | 26 (129) | 120 (587) | 162 (783) |
| New London | CT | 506 (138) | 47 (144) | 41 (128) | 57 (183) | 45 (147) | 29 (96) | 27 (90) | 35 (117) | 59 (198) | 35 (117) | 50 (172) | 48 (158) | 33 (109) |
| Bristole,f | MA | 919 (127) | a | a | a | a | a | a | a | 42 (68) | 146 (233) | 456 (722) | 198 (314) | 43 (69) |
| Suffolke,f | NY | 2114 (121) | 265 (191) | 156 (112) | 212 (151) | 392 (279) | 347 (245) | 88 (62) | 70 (48) | 92 (62) | 94 (63) | 108 (72) | 120 (77) | 170 (104) |
| Newporte,f | RI | 133 (116) | a | 0 (0) | a | a | 0 (0) | a | a | 16 (163) | 19 (193) | 47 (471) | 26 (259) | 15 (153) |
| Accomacke,f | VA | 73 (113) | 11 (196) | a | 36 (690) | a | a | a | a | 0 (0) | 0 (0) | 0 (0) | a | a |
| Columbiae,f | NY | 92 (102) | a | a | a | a | a | a | a | 12 (164) | a | 17 (235) | 18 (249) | 18 (247) |
| Hunterdone,f | NJ | 167 (101) | a | a | a | a | a | 18 (134) | a | 21 (146) | 11 (74) | 29 (189) | 19 (123) | 27 (185) |
| Tollande,f | CT | 152 (98) | a | 16 (116) | 16 (121) | a | a | a | a | 13 (104) | 13 (103) | 23 (184) | 16 (127) | 20 (157) |
| Putname,f | NY | 96 (83) | a | a | a | a | a | 13 (134) | a | 13 (137) | a | a | a | 20 (194) |
| Middlesex | CT | 177 (80) | 19 (93) | 13 (65) | 18 (94) | 14 (76) | a | a | a | 17 (94) | 19 (106) | 18 (100) | 23 (127) | 16 (88) |
| Litchfielde,f | CT | 191 (68) | a | a | 12 (50) | 13 (55) | a | 24 (103) | a | 23 (100) | 14 (61) | 18 (79) | 16 (70) | 39 (169) |
| Sussexe,f | NJ | 115 (63) | 0 (0) | 0 (0) | a | a | a | a | a | 11 (69) | 23 (140) | a | 17 (97) | 30 (173) |
| Orangee,f | NY | 223 (55) | a | a | a | 11 (34) | a | a | a | 36 (107) | 25 (74) | 27 (78) | 40 (114) | 46 (130) |
| Fairfielde,f | CT | 455 (45) | 36 (40) | 29 (33) | 36 (42) | 31 (37) | 39 (47) | 39 (47) | 27 (33) | 46 (56) | 36 (43) | 23 (27) | 54 (63) | 59 (69) |
| Atlantic | NJ | 169 (45) | a | a | a | 19 (63) | 19 (63) | 16 (52) | a | 15 (47) | 19 (59) | 23 (67) | 16 (46) | 11 (34) |
| Warrene,f | NJ | 74 (44) | a | a | a | a | a | a | 0 (0) | a | a | 13 (88) | a | 12 (84) |
| Berkshiree,f | MA | 110 (42) | a | a | 0 (0) | a | a | 12 (56) | a | 18 (81) | 24 (107) | 31 (136) | a | a |
| Westchestere,f | NY | 430 (38) | 27 (28) | 28 (29) | 32 (34) | 40 (43) | 29 (31) | 53 (57) | 19 (20) | 52 (55) | 19 (21) | 40 (44) | 45 (49) | 46 (51) |
| New Yorke,f | NY | 528 (36) | 32 (25) | 22 (18) | 40 (33) | 52 (43) | 46 (38) | 44 (36) | 26 (21) | 46 (37) | 57 (47) | 48 (40) | 46 (38) | 69 (57) |
| Morrise,f | NJ | 216 (33) | a | 11 (22) | 11 (21) | a | 13 (25) | 14 (26) | 23 (42) | 29 (52) | 20 (36) | 25 (44) | 34 (58) | 26 (46) |
| Monmouthe,f | NJ | 278 (32) | a | a | 18 (26) | 16 (23) | a | 21 (30) | 19 (27) | 15 (21) | 37 (50) | 45 (59) | 41 (52) | 45 (59) |
| Essexe,f | MA | 296 (32) | a | 11 (15) | 12 (16) | a | 14 (19) | 19 (26) | 21 (28) | 46 (58) | 39 (48) | 43 (53) | 39 (47) | 33 (40) |
| Somersete,f | NJ | 112 (31) | a | a | a | a | a | a | a | 18 (57) | a | 22 (67) | a | 17 (53) |
| New Havene,f | CT | 285 (30) | 31 (33) | 18 (20) | 15 (18) | 25 (31) | a | 18 (23) | 18 (23) | 26 (34) | 19 (25) | 24 (32) | 42 (55) | 39 (51) |
| Norfolke,f | MA | 206 (27) | a | a | a | 11 (18) | 14 (23) | 12 (20) | 21 (32) | 24 (36) | 27 (40) | 28 (41) | 28 (40) | 26 (37) |
| Yorke,f | ME | 76 (25) | 0 (0) | a | a | a | a | a | a | a | a | a | 11 (44) | 11 (45) |
aCounties’ annual counts of 1–10 are masked in this table but are included in the “All Years” counts. Zero annual counts are included.
bBabesiosis rates are rounded to the nearest whole number. Counties are sorted in descending order by overall babesiosis rates (ie, from highest to lowest rates).
cCounties with an overall number of babesiosis cases of 1–10 or most of the yearly counts of 1–10 are not displayed in the table, including the following: Beltrami, MN; Buffalo, WI; Cass, MN; Clearwater, MN; Dorchester, MD; Greene, NY; Hubbard, MN; Kent, MD; Kent, RI; Knox, ME; Northampton, VA; Pike, PA; Renssalaer, NY; Sullivan, NY; Talbot, MD; and Washington, NY. Cases from these counties are included in the “total” row.
dAmong counties not in the table, the following counties had a total of 11 or more cases in the last 5 years: Greene, NY; Kent, RI; Knox, ME; Pike, PA; Rensselaer, NY; Sullivan, NY; and Washington, NY.
eThe trend of Babesiosis occurrence rates during 2006–2017 is statistically significant according to the Cochran-Armitage test for trend, using a significance level of P < .05.
fQ-values are generated using the R 2.4.2 qvalue package to measure the proportion of false positives incurred in tests that are significant. Q-values <0.05 are marked.