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Volume 23, Number 6—June 2017
CME ACTIVITY - Research

Relative Risk for Ehrlichiosis and Lyme Disease in an Area Where Vectors for Both Are Sympatric, New Jersey, USA

Andrea EgiziComments to Author , Nina H. Fefferman, and Robert A. Jordan
Author affiliations: Rutgers University, New Brunswick, New Jersey, USA (A. Egizi, N.H. Fefferman, R.A. Jordan); Monmouth County Mosquito Control Division, Tinton Falls, New Jersey, USA (A. Egizi, R.A. Jordan); University of Tennessee, Knoxville, Tennessee, USA (N.H. Fefferman)

Main Article

Table

Parameters used in relative risk calculations for ehrlichiosis and Lyme disease, by vector, Monmouth County, New Jersey, USA*

Parameter Ixodes scapularis Amblyomma americanum
Relative abundance of each species CIS = 38.32

CAA = 61.68

Adults
Nymphs
Adults
Nymphs
Relative abundance of each life stage CIS. D = 19.96 CIS. N = 80.04 CAA. D = 35.34 CAA. N = 64.66
Infection rates per life stage
IIS. D = 39.87
IIS. N = 23.3

IAA. D = 11.7
IAA. N = 9.04
Infection rates, weighted IIS = 26.60 IAA = 9.98

*Values are in percentages. Relative abundances (denoted by CX) are derived from specimens submitted to the Monmouth County Mosquito Control Division’s tick identification and testing service during peak Lyme disease transmission season (May–August) and during a 10-year period (2006–2015). Infection rates of I. scapularis ticks with Borrelia burgdorferi (IIS) also from passive surveillance program. Infection rates of A. americanum ticks (IAA) encompass both Ehrlichia chaffeensis and E. ewingii (accounting for co-infection).

Main Article

Page created: May 11, 2017
Page updated: May 11, 2017
Page reviewed: May 11, 2017
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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