WEST NILE VIRUS EPIDEMIOLOGY

UPDATE

Christopher Perkins, DO, MPHDallas County Health and Human ServicesAugust 7, 2012

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

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

WNV Human Cases, Dallas County, 2003-2011

All human WNV illnesses are reportable as of 2004.

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

Questions?