1. West Nile Virus Epidemiology Update
Christopher Perkins, DO, MPH
Dallas County Health and Human Services
August 7, 2012

2. Timeline of Events 5/24: Seasonal WNV DCHHS press conference
6/5: 1st confirmed +mosquito pool, from 5/30; Health Advisory issued
6/20: 1st confirmed human report (57yo WNND); 2nd WNV press conference held
7/9: Total 10 WNV cases
7/13: 1st report death; 3rd press conference
7/19: 2nd death reported; 4th press conference
7/23: Total 36 WNV cases
7/25: Total 64 cases; 2nd WNV Health Advisory
8/2: Total 115 cases; 3rd WNV Health Advisory

3. DCHHS Summary of Human Cases
(as of 5 pm 8/6/12)
130 total cases:
93 WNND (72%) + 37 WNF (28%)
WNND: 69% >50 yrs age; 68% male
92% hospitalized; 7 deaths
46% of WNND hospitalizations--ICU admissions
60% White, 26% Hispanic, 6% Black, 3% Asian, 5% Unknown
WNF: 61% >50 yrs age; 42% male
23% hospitalized
80% of all WNV cases reside in northern half of Dallas County

4. WNV Human Cases, Dallas County, 2003-2011
All human WNV illnesses are reportable as of 2004.

5. Distribution of Human WNV cases, Dallas County (130 patients, as of 8/6/2012)

6. Questions?