Tick-Borne Diseases

Babesiosis: Data and Statistics

From 2019 to 2023, close to 19 cases of babesiosis were reported in Delaware. In 2023, 3 cases of babesiosis were reported in Delaware for an incidence rate of 0.3 cases per 100,000 population.

Babesiosis Case Counts and Incidence Rates by Year and County, Delaware, 2019-2023

	CASE COUNTS				INCIDENT RATE PER 100,000 POPULATION*
YEAR	NEW CASTLE COUNTY	KENT COUNTY	SUSSEX COUNTY	STATE	STATE
2023	2	0	1	3	0.3
2022	1	0	0	1	0.1
2021	2	0	2	4	0.4
2020	2	1	1	4	0.4
2019	2	0	3	5	0.5
* Rates based on small numbers (less than 20) result in a large relative standard error, indicating an imprecise estimate that is unstable and unreliable. + These data include confirmed and probable cases according to national surveillance case definitions adopted by the Council of State and Territorial Epidemiologists (CSTE). The babesiosis case definition may be found here. All rates are calculated per 100,000 population based on the U.S. Census Bureau’s population estimates (Current year incidence rates and case count subject to change when new population estimates are published, and data is finalized).

Source: Delaware Department of Health and Social Services, Division of Public Health, Office of Infectious Disease Epidemiology, Delaware Electronic Reporting and Surveillance System

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Babesiosis: Data and Statistics

Office of Infectious Disease Epidemiology

24/7 Emergency Contact Number: 1-888-295-5156

Delaware's Government