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Volume 23, Number 4—April 2017

Research Letter

West Nile Virus Seroprevalence, Connecticut, USA, 2000–2014

Megan E. Cahill, Yi Yao, David Nock, Philip M. Armstrong, Theodore G. Andreadis, Maria A. Diuk-Wasser, and Ruth R. MontgomeryComments to Author 
Author affiliations: Yale University School of Public Health, New Haven, Connecticut, USA (M.E. Cahill); Yale University School of Medicine, New Haven (Y. Yao, D. Nock, R.R. Montgomery); The Connecticut Agricultural Experiment Station, New Haven (P.M. Armstrong, T.G. Andreadis); Columbia University, New York, New York, USA (M.A. Diuk-Wasser)

Main Article

Table

Seroconversion rates among participants in study of West Nile virus, Connecticut, USA, 2000–2014*

Participant
Asymptomatic Symptomatic, 
DPH case-patients
2000–2014, n = 116
Not immunosuppressed

Immunosuppressed
Seropositive, n = 76
Seronegative, 
n = 814
Seropositive, 
n = 29
Seronegative, 
n = 144
Age, y, mean ± SEM 45.7 ± 2.7 48.6 ± 0.8 43.55 ± 2.5 48.48 ± 1.2 56.6 ± 1.7†
Female, % 52.6 61.1 82.8 76.4 44.0
Hispanic, % 7.9 4.1 55.2 16.7‡ Data not available
White, % 59.2 81.7§ 75.9 75.0 Data not available

*DPH, Connecticut Department of Public Health.
†Mean age for DPH case-patients differed statistically from that for seropositive nonimmunosuppressed (p<0.001) and seropositive immunosuppressed (p<0.001) participants.
‡Difference in percentage of Hispanics within the seropositive and seronegative categories of the immunosuppressed population (p<0.0001).
§Difference in percentage of participants self-identifying as white within the seropositive and seronegative categories of the nonimmunosuppressed population (p<0.0001).

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