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Volume 17, Number 12—December 2011

Letter

Bat Rabies and Human Postexposure Prophylaxis, New York, USA

Millicent EidsonComments to Author , Yoichiro Hagiwara, Robert J. Rudd, and Louise-Anne McNutt
Author affiliations: New York State Department of Health, Albany, New York, USA (M. Eidson, Y. Hagiwara, R.J. Rudd); University at Albany School of Public Health, Rensselaer, New York, USA (M. Eidson, Y. Hagiwara, L.-A. McNutt)

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Table

Bat-associated rabies exposure incidents, PEP, and bats received for testing, New York, USA, 1993–2002*

1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 Total
Total incidents† 137 (100.0) 116 (100.0) 290 (100.0) 527 (100.0) 672 (100.0) 764 (100.0) 964 (100.0) 924 (100.0) 973 (100.0) 953 (100.0) 6,320 (100.0)
Bats tested† 42 (30.7) 43 (37.1) 57 (19.7) 111 (21.1) 111 (16.5) 116 (15.2) 112 (11.6) 110 (11.9) 113 (11.6) 124 (13.0) 939 (14.9)
Bats not tested 95 (69.3) 73 (62.9) 233 (80.3) 416 (78.9) 561 (83.5) 648 (84.8) 852 (88.4) 814 (88.1) 860 (88.4) 829 (87.0) 5,381 (85.1)
Total PEP 184 131 440 968 1,326 1,512 1,755 1,641 1,735 1,673 11,365
Average/incident 1.3 1.1 1.5 1.8 2.0 2.0 1.8 1.8 1.8 1.8 1.8
Bat rabies status
Positive† 49 (26.6) 17 (13.0) 34 (7.7) 74 (7.6) 88 (6.6) 111 (7.3) 110 (6.3) 110 (6.7) 99 (5.7) 98 (5.9) 790 (7.0)
Negative 6 (3.3) 24 (18.3) 17 (3.9) 37 (3.8) 36 (2.7) 33 (2.2) 22 (1.3) 32 (2.0) 21 (1.2) 23 (1.4) 251 (2.2)
Untestable 18 (9.8) 10 (7.6) 34 (7.7) 110 (11.4) 89 (6.7) 69 (4.6) 74 (4.2) 76 (4.6) 114 (6.6) 115 (6.9) 709 (6.2)
Not tested 111 (60.3) 80 (61.1) 355 (80.7) 747 (77.2) 1,113 (83.9) 1,299 (85.9) 1,549 (88.3) 1,423 (86.7) 1,501 (86.5) 1,437 (85.9) 9,615 (84.6)
Bat exposure type
Bite† 43 (23.4) 71 (54.2) 124 (28.2) 160 (16.5) 188 (14.2) 134 (8.9) 186 (10.6) 163 (9.9) 150 (8.6) 145 (8.7) 1,364 (12.0)
Scratch or saliva contact 73 (39.7) 50 (38.2) 102 (23.2) 259 (26.8) 429 (32.4) 168 (11.1) 147 (8.4) 131 (8.0) 152 (8.8) 126 (7.5) 1,637 (14.4)
Reasonable probability NA NA NA NA NA 1,145 (75.7) 1,365 (77.8) 1,299 (79.2) 1,382 (79.7) 1,367 (81.7) 6,558 (57.7)
Other 68 (37.0) 10 (7.6) 214 (48.6) 549 (56.7) 709 (53.5) 65 (4.3) 57 (3.2) 48 (2.9) 51 (2.9) 35 (2.1) 1,806 (15.9)
Bats received for rabies testing
Total 420 (100.0) 419 (100.0) 386 (100.0) 764 (100.0) 741 (100.0) 868 (100.0) 923 (100.0) 1,220 (100.0) 1,421 (100.0) 1,487 (100.0) 8,649 (100.0)
By bat rabies status
Positive‡ 20 (4.8) 17 (4.1) 19 (4.9) 23 (3.0) 28 (3.8) 38 (4.4) 34 (3.7) 36 (3.0) 45 (3.2) 34 (2.3) 294 (3.4)
Negative 342 (81.4) 375 (89.5) 315 (81.6) 653 (85.5) 667 (90.0) 769 (88.6) 833 (90.2) 1,112 (91.1) 1,300 (91.5) 1,363 (91.7) 7,729 (89.4)
Untestable 58 (13.8) 27 (6.4) 52 (13.5) 88 (11.5) 46 (6.2) 61 (7.0) 56 (6.1) 72 (5.9) 76 (5.3) 90 (6.1) 626 (7.2)
By exposure type
Bite† 77 (18.3) 106 (25.3) 103 (26.7) 118 (15.4) 98 (13.2) 139 (16.0) 141 (15.3) 131 (10.7) 131 (9.2) 148 (10.0) 1,192 (13.8)
Nonbite§ 343 (81.7) 313 (74.7) 283 (73.3) 646 (84.6) 643 (86.8) 729 (84.0) 782 (84.7) 1,089 (89.3) 1,290 (90.8) 1,339 (90.0) 7,457 (86.2)

*PEP, human rabies postexposure prophylaxis; NA, data not collected for this time period.
†Test for trend, p<0.0001.
‡Test for trend, p<0.005.
§Includes scratch, saliva, and reasonable probability.

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