Disease Cases from Mosquitos and Ticks

The number of disease cases from infected mosquitoes, ticks, and fleas has increased from 27,388 in 2004 to 96,075 in 2016.

Source: CDC Vital Signs, May, 2018


Graphic: Disease cases from mosquitoes (2004-2016, reported)

Disease cases from mosquitoes (2004-2016, reported)

Disease counts include both locally transmitted and travel-associated cases.

Top 20% (more than 1,678)*
2nd 20% (1,138-1,678)
3rd 20% (545-1,137)
4th 20% (313-544)
Bottom 20% of states (87-312)

*All states and territories in this quintile fell between 1,678 and 9,254, with the exception of Puerto Rico, which had 80,534 cases.

Reporting AreaMosquito-borne Disease Cases (No.)
Alabama408
Alaska87
Arizona2,186
Arkansas364
California9,254
Colorado2,818
Connecticut544
Delaware124
District of Columbia304
Florida3,822
Georgia1,420
Hawaii414
Idaho1,393
Illinois2,582
Indiana673
Iowa531
Kansas659
Kentucky265
Louisiana1,465
Maine121
Maryland1,925
Massachusetts1,209
Michigan1,059
Minnesota1,458
Mississippi1,137
Missouri659
Montana395
Nebraska1,678
Nevada442
New Hampshire173
New Jersey1,904
New Mexico430
New York7,167
North Carolina968
North Dakota1,057
Ohio1,359
Oklahoma853
Oregon438
Pennsylvania1,395
Rhode Island294
South Carolina312
South Dakota1,337
Tennessee699
Texas6,648
Utah498
Vermont93
Virginia1,319
Washington781
West Virginia238
Wisconsin640
Wyoming383
American Samoa171
Puerto Rico80,534
U.S. Virgin Islands1,755

Maps show case counts, not disease risk


Graphic: Disease cases from ticks (2004-2016, reported)

Disease cases from ticks (2004-2016, reported)

There were 5 categories for the results:

Top 20% (more than 12,856)

2nd  20% (2,141-12,856)

3rd 20% (1,099-2,140)

4th 20% (183-1,098)

Bottom 20% of states (117-182)

None: 0

Reporting AreaTickborne Disease Cases (No.)
Alabama2,451
Alaska117
Arizona546
Arkansas7,094
California1,408
Colorado167
Connecticut36,727
Delaware8,486
District of Columbia720
Florida1,848
Georgia1,427
Hawaii0
Idaho186
Illinois3,685
Indiana1,560
Iowa2,046
Kansas1,164
Kentucky1,098
Louisiana170
Maine12,856
Maryland22,166
Massachusetts50,234
Michigan1,493
Minnesota26,886
Mississippi539
Missouri6,537
Montana182
Nebraska481
Nevada131
New Hampshire13,710
New Jersey51,578
New Mexico128
New York69,313
North Carolina9,075
North Dakota319
Ohio1,358
Oklahoma4,670
Oregon505
Pennsylvania73,610
Rhode Island7,095
South Carolina1,143
South Dakota200
Tennessee5,950
Texas2,140
Utah198
Vermont6,161
Virginia16,454
Washington300
West Virginia1,964
Wisconsin33,255
Wyoming140
American Samoa 0
Puerto Rico 0
U.S. Virgin Islands 0

Maps show case counts, not disease risk.

SOURCE: Rosenberg R, et al. Trends in Reported Vector-Borne Disease Cases—United States and U.S. Territories, 2004-2016.  MMWR Morb Mortal Wkly Rep. Vol. 67, 2018.