West Nile Virus Archived Information
2006 Summary
In 2006, 4269 human cases of WNV, including 177 fatalities, were reported from 43 states and the District of Columbia. States reporting cases of WNV include:
- Alabama (8 human cases)
- Arizona (150 human cases, 11 fatalities)
- Arkansas (29 human cases, 4 fatalities)
- California (278 human cases, 7 fatalities)
- Colorado (345 human cases, 7 fatalities)
- Connecticut (9 human cases, 1 fatality)
- District of Columbia (2 human cases)
- Florida (3 human cases)
- Georgia (8 human cases, 1 fatality)
- Idaho (996 human cases, 21 fatalities)
- Illinois (215 human cases, 10 fatalities)
- Indiana (80 human cases, 5 fatalities)
- Iowa (37 human cases)
- Kansas (30 human cases, 4 fatalities)
- Kentucky (6 human cases, 1 fatality)
- Louisiana (180 human cases, 9 fatalities)
- Maryland (11 human cases, 1 fatality)
- Massachusetts (3 human cases)
- Michigan (55 human cases, 7 fatalities)
- Minnesota (65 human cases, 3 fatalities)
- Mississippi (183 human cases, 14 fatalities)
- Missouri (62 human cases, 5 fatalities)
- Montana (34 human cases)
- Nebraska (264 human cases, 1 fatality)
- Nevada (124 human cases, 1 fatality)
- New Jersey (5 human cases)
- New Mexico (8 human cases, 1 fatality)
- New York (24 human case, 4 fatalities)
- North Carolina (1 human case)
- North Dakota (137 human cases, 1 fatality)
- Ohio (48 human cases, 4 fatalities)
- Oklahoma (48 human cases, 6 fatalities)
- Oregon (69 human cases, 2 fatalities)
- Pennsylvania (9 human cases, 2 fatalities)
- South Carolina (1 human case)
- South Dakota (113 human cases, 3 fatalities)
- Tennessee (22 human cases, 1 fatality)
- Texas (354 human cases, 32 fatalities)
- Utah (158 human cases, 5 fatalities)
- Virginia (5 human cases)
- Washington (3 human cases)
- West Virginia (1 human case)
- Wisconsin (21 human cases, 1 fatality)
- Wyoming (65 human cases, 2 fatalities)
2005 Summary
In 2005, 3000 human cases of WNV, including 119 deaths, were reported from 43, and the District of Columbia. States reporting cases of WNV include:
- Alabama (10 human cases, 2 deaths)
- Arizona (113 human cases, 5 deaths)
- Arkansas (28 human cases, 4 deaths),
- California (880 human cases, 19 deaths)
- Colorado (106 human cases, 2 deaths)
- Connecticut (6 human cases, 1 death)
- Delaware (2 human cases),
- District of Columbia (5 human cases)
- Florida (21 human cases, 1 death)
- Georgia (20 human cases, 2 deaths)
- Idaho (13 human cases)
- Illinois (252 human cases, 13 deaths)
- Indiana (23 human cases, 1 death)
- Iowa (37 human cases, 2 deaths)
- Kansas (25 human cases, 1 death)
- Kentucky (5 human cases, 1 death)
- Louisiana (171 human cases, 11 deaths)
- Maryland (5 human cases)
- Massachusetts (6 human cases, 1 death)
- Michigan (62 human cases, 4 deaths)
- Minnesota (45 human cases, 3 deaths)
- Mississippi (70 human cases, 6 deaths)
- Missouri (30 human cases, 3 deaths)
- Montana (25 human cases)
- Nebraska (188 human cases, 5 deaths)
- Nevada (31 human cases, 1 human death)
- New Jersey (6 human cases)
- New Mexico (33 human cases, 2 deaths)
- New York (38 human cases, 4 deaths)
- North Carolina (4 human cases)
- North Dakota (86 human cases)
- Ohio (61 human cases, 2 deaths)
- Oklahoma (31 human cases, 1 death)
- Oregon (7 human cases)
- Pennsylvania (25 human cases, 2 deaths)
- Rhode Island (1 human case)
- South Carolina (5 human cases, 1 death),
- South Dakota (229 human cases, 2 deaths)
- Tennessee (18 human cases, 1 death)
- Texas (195 human cases, 11 deaths)
- Utah (52 human cases, 1 death)
- Virginia (1 human case)
- Wisconsin (17 human cases, 2 deaths)
- Wyoming (12 human cases, 2 deaths)
2004 Summary
In 2004, 2539 human cases of WNV, including 100 deaths, were reported from 40 states, and the District of Columbia. States reporting cases of WNV include:
- Alabama (16 human cases)
- Arizona (391 human cases, 16 deaths)
- Arkansas (28 human cases),
- California (779 human cases, 28 deaths)
- Colorado (291 human cases, 4 deaths)
- Connecticut (1 human case)
- District of Columbia (2 human cases)
- Florida (41 human cases, 2 deaths)
- Georgia (21 human cases, 1 death)
- Idaho (3 human cases)
- Illinois (60 human cases, 4 deaths)
- Indiana (13 human cases, 1 death)
- Iowa (23 human cases, 2 deaths)
- Kansas (43 human cases, 2 deaths)
- Kentucky (7 human cases)
- Louisiana (109 human cases, 7 deaths)
- Maryland (16 human cases)
- Michigan (16 human cases)
- Minnesota (34 human cases, 2 deaths)
- Mississippi (51 human cases, 4 deaths)
- Missouri (36 human cases, 2 deaths)
- Montana (6 human cases)
- Nebraska (53 human cases)
- Nevada (44 human cases)
- New Jersey (1 human case)
- New Mexico (88 human cases, 4 deaths)
- New York (10 human cases)
- North Carolina (3 human cases)
- North Dakota (20 human cases, 2 death)
- Ohio (12 human cases, 2 deaths)
- Oklahoma (22 human cases, 3 deaths)
- Oregon (3 human cases)
- Pennsylvania (15 human cases, 2 deaths)
- South Carolina (2 human cases),
- South Dakota (51 human cases, 1 death)
- Tennessee (14 human cases)
- Texas (176 human cases, 8 deaths)
- Utah (11 human cases)
- Virginia (5 human cases, 1 death)
- Wisconsin (12 human cases, 2 deaths)
- Wyoming (10 human cases)
2003 Summary
In 2003 there were 9862 human cases of WNV, including 264 deaths, reported from 45 states and the District of Columbia. States that reported detection of WNV in 2003 include:
- Alabama (37 human cases, 3 deaths)
- Arizona (13 human cases, 1 death)
- Arkansas (25 human cases)
- California (3 human cases)
- Colorado (2947 human cases, 63 deaths)
- Connecticut (17 human cases)
- Delaware (17 human cases, 2 deaths)
- District of Columbia (3 human cases)
- Florida (94 human cases, 6 deaths)
- Georgia (50 human cases, 4 deaths)
- Idaho (1 human case)
- Illinois (54 human cases, 1 death)
- Indiana (47 human cases, 4 deaths)
- Iowa (147 human cases, 6 deaths)
- Kansas (91 human cases, 4 deaths)
- Kentucky (14 human cases, 1 death)
- Louisiana (124 human cases, 8 deaths)
- Maryland (73 human cases, 8 deaths)
- Massachusetts (17 human cases, 1 death)
- Michigan (19 human cases, 2 deaths)
- Minnesota (148 human cases, 4 deaths)
- Mississippi (87 human cases, 1 death)
- Missouri (64 human cases, 8 deaths)
- Montana (222 human cases, 4 deaths)
- Nebraska (1942 human cases, 29 deaths)
- Nevada (2 human cases)
- New Hampshire (3 human cases)
- New Jersey (34 human cases, 3 deaths)
- New Mexico (209 human cases, 4 deaths)
- New York (71 human cases, 11 deaths)
- North Carolina (24 human cases, 2 deaths)
- North Dakota (617 human cases, 5 deaths)
- Ohio (108 human cases, 8 deaths)
- Oklahoma (79 human cases)
- Pennsylvania (237 human cases, 8 deaths)
- Rhode Island (7 human cases, 1 death)
- South Carolina (6 human cases)
- South Dakota (1039 human cases, 14 deaths)
- Tennessee (26 human cases, 1 death)
- Texas (720 human cases, 37 deaths)
- Utah (1 human case)
- Vermont (3 human cases)
- Virginia (26 human cases, 1 death)
- West Virginia (2 human cases)
- Wisconsin (17 human cases)
- Wyoming (375 human cases, 9 deaths)
2002 Summary
In 2002 there were 4156 human cases of WNV, including 284 deaths. The virus was detected in 44 states and the District of Columbia. Effected areas included:
- Alabama (49 human cases, 3 deaths)
- Arkansas (43 human cases, 3 deaths)
- California (1 human case)
- Colorado (14 human cases)
- Connecticut (17 human cases)
- Delaware (1 human case)
- District of Columbia (34 human cases, 1 death)
- Florida (28 human cases, 2 deaths)
- Georgia (44 human cases, 7 deaths)
- Illinois (884 human cases, 64 deaths)
- Indiana (293 human cases, 11 deaths)
- Iowa (54 human cases, 2 deaths)
- Kansas (22 human cases)
- Kentucky (75 human cases, 5 deaths)
- Louisiana (329 human cases, 25 deaths)
- Maryland (36 human cases, 7 deaths)
- Massachusetts (23 human cases, 3 deaths)
- Michigan (614 human cases, 51 deaths)
- Minnesota (48 human cases)
- Mississippi (192 human cases, 12 deaths)
- Missouri (168 human cases, 7 deaths)
- Montana (2 human cases)
- Nebraska (152 human cases, 7 deaths)
- New Jersey (24 human cases)
- New York (82 human cases, 5 deaths)
- North Carolina (2 human cases)
- North Dakota (17 human cases, 2 deaths)
- Ohio (441 human cases, 31 deaths)
- Oklahoma (21 human cases, 2 deaths)
- Pennsylvania (62 human cases, 7 deaths)
- Rhode Island (1 human case)
- South Carolina (1 human case)
- South Dakota (37 human cases)
- Tennessee (56 human cases, 7 deaths)
- Texas (202 human cases, 13 deaths)
- Vermont (1 human case)
- Virginia (29 human cases, 2 deaths)
- West Virginia (3 human cases, 2 deaths)
- Washington (1 case of an individual who was exposed in another state)
- Wisconsin (52 human cases, 3 deaths)
- Wyoming (2 human cases)
2001 Summary
In 2001, 50 human cases, including 5 fatalities, of West Nile virus encephalitis were reported in the United States. Thirteen human cases were reported in New York, 10 in Florida, 8 in New Jersey, 6 in Maryland, 6 in Connecticut, 3 in Pennsylvania, 2 in Massachusetts, 1 in Louisiana, and 1 in Georgia. In 2001 the West Nile virus was detected in states as far west as Wisconsin, Iowa, Missouri, Arkansas, and Louisiana.
2000 Summary
In 2000, surveillance included the use of sentinel chickens, human and veterinary monitoring, and mosquito collection. Some adult mosquitoes carrying the virus were determined to have survived over the winter. Therefore, in addition to efforts to control mosquito larvae, mosquito control programs in many areas again implemented targeted pesticide applications to control adult mosquitoes. In 2000, 21 human cases of WNV encephalitis were reported in the United States, resulting in 2 deaths (one in New York state and one in New Jersey).
1999 Summary
In 1999 WNV was detected in four U.S. states and resulted in 62 cases of severe encephalitis and 7 deaths in New York state. Due to the concern for public health, the Center for Disease Control and Prevention (CDC) and affected states developed and implemented surveillance and response plans. As a result, targeted pesticide applications were performed to control adult mosquitoes that transmit the virus.
The above summaries are based on information available from the following links:
- Current NPIC WNV Data
- Sixth National Conference on WNV in the U.S.
San Jose, California
February 8-10, 2005 - Fifth Nat'l Conference on WNV in the U.S. (slide presentation)
Denver, Colorado
February 3-5, 2004 - Fourth Nat'l Conference on WNV in the U.S. (slide presentation)
New Orleans, Louisiana
February 9-11, 2003 - Third Nat'l Planning Meeting for the Surveillance, Prevention, and Control of WNV in the U.S. (slide presentation)
Atlanta, Georgia
March 22-23, 2002 - Second Nat'l Planning Meeting for the Surveillance, Prevention, and Control of WNV in the U.S. (slide presentation)
Charlotte, North Carolina
January 31-February 4, 2001
Archived CDC Morbidity and Mortality Weekly Reports - West Nile Virus 2000-2006
MMWR 2005-2006:
- West Nile Virus Activity - United States, 2006. June 08, 2007 / 56(22);556-559
- West Nile Virus Transmission Through Blood Transfusion - South Dakota, 2006. February 02, 2007 / 56(04);76-79
- West Nile Virus Activity - United States, January 1-November 07, 2006. November 10, 2006 / 55(44);1204-1205
- West Nile Virus Activity - United States, January 1-October 10, 2006. October 13, 2006 / 55(40);1097-1098
- West Nile Virus Activity - United States, January 1-September 12, 2006. September 15, 2006 / 55(36);996
- West Nile Virus Activity - United States, January 1-August 15, 2006. August 18, 2006 / 55(32);879-880
- West Nile Virus Activity - United States, January 1-July 18, 2006. July 21, 2006 / 55(28);777-778
- Assessing Capacity for Surveillance, Prevention, and Control of West Nile Virus Infection - United States, 1999 and 2004. February 17, 2006 / 55(06);150-153
- Morbidity and Mortality Weekly Report, Dec 16, 2005/54(49); 1253-1256.
- Morbidity and Mortality Weekly Report, Nov 11, 2005/54(44);1133-1134.
- Morbidity and Mortality Weekly Report, Nov 11, 2005/54(44);1133-1134.
- Morbidity and Mortality Weekly Report, Nov 04, 2005/54(43);1105-1106.
- Morbidity and Mortality Weekly Report, Oct 28, 2005/54(42);1082-1083.
- Morbidity and Mortality Weekly Report, Oct 21, 2005/54(41);1056-1057.
- Morbidity and Mortality Weekly Report, Oct 14, 2005/54(40);1021-1023.
- Morbidity and Mortality Weekly Report, Oct 07, 2005/54(39);999.
- Morbidity and Mortality Weekly Report, Sep 30, 2005/54(38);964-965.
- Morbidity and Mortality Weekly Report, Sep 23, 2005/54(37);931-932.
- Morbidity and Mortality Weekly Report, Sep 16, 2005/54(36);902-903.
- Morbidity and Mortality Weekly Report, Sep 09, 2005/54(35);877-878.
- Morbidity and Mortality Weekly Report, Sep 02, 2005/54(34);851.
- Morbidity and Mortality Weekly Report, Aug 12, 2005/54(31);769-770.
- Morbidity and Mortality Weekly Report, Jul 15, 2005/54(27);678-679.
MMWR 2003-2004:
- Morbidity and Mortality Weekly Report, Nov 28, 2003/52(47);1160.
- Morbidity and Mortality Weekly Report, Nov 21, 2003/52(46);1132.
- Morbidity and Mortality Weekly Report, Nov 14, 2003/52(45);1105-1106.
- Morbidity and Mortality Weekly Report, Nov 07, 2003/52(44);1080.
- Morbidity and Mortality Weekly Report, Oct 31, 2003/52(43);1053-1054.
- Morbidity and Mortality Weekly Report, Oct 24, 2003/52(42);1022-1023.
- Morbidity and Mortality Weekly Report, Oct 24, 2003/52(42);1017-1019.
- Morbidity and Mortality Weekly Report, Oct 17, 2003/52(41);996-997.
- Morbidity and Mortality Weekly Report, Oct 10, 2003/52(40);964-965.
- Morbidity and Mortality Weekly Report, Oct 03, 2003/52(39);941.
- Morbidity and Mortality Weekly Report, Sep 26, 2003/52(38);916-919.
- Morbidity and Mortality Weekly Report, Sep 19, 2003/52(37);889-890.
- Morbidity and Mortality Weekly Report, Sep 19, 2003/52(37);886-888.
- Morbidity and Mortality Weekly Report, Sep 18, 2003/52(dispatch);1-3.
- Morbidity and Mortality Weekly Report, Sep 12, 2003/52(36);870.
- Morbidity and Mortality Weekly Report, Sep 05, 2003/52(35);845-846.
- Morbidity and Mortality Weekly Report, Aug 29, 2003/52(34);821-822.
- Morbidity and Mortality Weekly Report, Aug 22, 2003/52(33);797.
- Morbidity and Mortality Weekly Report, Aug 22, 2003/52(33);796.
- Morbidity and Mortality Weekly Report, Aug 15, 2003/52(32);772.
- Morbidity and Mortality Weekly Report, Aug 15, 2003/52(32);769-772.
- Morbidity and Mortality Weekly Report, Aug 08, 2003/52(31);741.
- Morbidity and Mortality Weekly Report, Aug 01, 2003/52(30);713-714.
- Morbidity and Mortality Weekly Report, Jul 25, 2003/52(29);686.
- Morbidity and Mortality Weekly Report, Jul 18, 2003/52(28);665-666.
- Morbidity and Mortality Weekly Report, Jul 11, 2003/52(27);646.
- Morbidity and Mortality Weekly Report, Jul 11, 2003/52(27);629-634.
- Morbidity and Mortality Weekly Report, Nov 19, 2004/53(45);1071-1072.
- Morbidity and Mortality Weekly Report, Nov 12, 2004/53(44);1050-1051.
- Morbidity and Mortality Weekly Report, Nov 05, 2004/53(43);1022-1023.
- Morbidity and Mortality Weekly Report, Oct 29, 2004/53(42);996.
- Morbidity and Mortality Weekly Report, Oct 22, 2004/53(41);971-972.
- Morbidity and Mortality Weekly Report, Oct 15, 2004/53(40);950-951.
- Morbidity and Mortality Weekly Report, Oct 08, 2004/53(39);922-923.
- Morbidity and Mortality Weekly Report, Oct 01, 2004/53(38);900.
- Morbidity and Mortality Weekly Report, Sep 24, 2004/53(37);875-876.
- Morbidity and Mortality Weekly Report, Sep 17, 2004/53(36);850-851.
- Morbidity and Mortality Weekly Report, Sep 17, 2004/53(36);842-844.
- Morbidity and Mortality Weekly Report, Sep 10, 2004/53(35);823-824.
- Morbidity and Mortality Weekly Report, Sep 03, 2004/53(34);795-796.
- Morbidity and Mortality Weekly Report, Aug 27, 2004/53(33);770-771.
- Morbidity and Mortality Weekly Report, Aug 20, 2004/53(32);742-743.
- Morbidity and Mortality Weekly Report, Aug 13, 2004/53(31);719-720.
- Morbidity and Mortality Weekly Report, Aug 5, 2004/53(30);686-687.
- Morbidity and Mortality Weekly Report, Jul 30, 2004/53(29);661-662.
- Morbidity and Mortality Weekly Report, Jul 23, 2004/53(28);638-639.
- Morbidity and Mortality Weekly Report, Jul 16, 2004/53(27);615.
- Morbidity and Mortality Weekly Report, Jul 09, 2004/53(26);586.
- Morbidity and Mortality Weekly Report, Jul 02, 2004/53(25);563.
- Morbidity and Mortality Weekly Report, Jun 25, 2004/53(24);535-536.
- Morbidity and Mortality Weekly Report, Jun 18, 2004/53(23);511-512.
- Morbidity and Mortality Weekly Report, Jun 11, 2004/53(22);484.
- Morbidity and Mortality Weekly Report, Apr 09, 2004/53(13);281-284.
- Morbidity and Mortality Weekly Report, Feb 27, 2004/53(07);154-157.
MMWR 2000-2002:
- Morbidity and Mortality Weekly Report, Dec 20, 2002/51(50);1135-1136.
- Morbidity and Mortality Weekly Report, Dec 20, 2002/51(50);1133-1135.
- Morbidity and Mortality Weekly Report, Dec 20, 2002/51(50);1129-1133.
- Morbidity and Mortality Weekly Report, Nov 29, 2002/51(47);1072-1073.
- Morbidity and Mortality Weekly Report, Nov 22, 2002/51(46);1049-1051.
- Morbidity and Mortality Weekly Report, Nov 15, 2002/51(45);1026-1027.
- Morbidity and Mortality Weekly Report, Nov 08, 2002/51(44);999-1000.
- Morbidity and Mortality Weekly Report, Nov 01, 2002/51(43);974-975.
- Morbidity and Mortality Weekly Report, Nov 01, 2002/51(43);973-974.
- Morbidity and Mortality Weekly Report, Oct 25, 2002/51(42);951-952.
- Morbidity and Mortality Weekly Report, Oct 18, 2002/51(41);929-931.
- Morbidity and Mortality Weekly Report, Oct 11, 2002/51(40);903.
- Morbidity and Mortality Weekly Report, Oct 04, 2002/51(39);877-878.
- Morbidity and Mortality Weekly Report, Sept 27, 2002/51(38);862-864.
- Morbidity and Mortality Weekly Report, Sept 20, 2002/51(37);836-837.
- Morbidity and Mortality Weekly Report, Sept 20, 2002/51(37);833-836.
- Morbidity and Mortality Weekly Report, Sept 20, 2002/51(37);825-828.
- Morbidity and Mortality Weekly Report, Sept 06, 2002/51(35);790.
- Morbidity and Mortality Weekly Report, Aug 23, 2002/51(33);742-743.
- Morbidity and Mortality Weekly Report, Aug 09, 2002/51(31);681-683.
- Morbidity and Mortality Weekly Report, July 26, 2002/51(29);645-646.
- Morbidity and Mortality Weekly Report, July 19, 2002/51(28);621.
- Morbidity and Mortality Weekly Report, July 12, 2002/51(27);598.
- Morbidity and Mortality Weekly Report, June 14, 2002/51(23);497-501.
- Morbidity and Mortality Weekly Report, Nov 30, 2001/50(47);1061-1062.
- Morbidity and Mortality Weekly Report, Nov 16, 2001/50(45);1013-1014.
- Morbidity and Mortality Weekly Report, Nov 09, 2001/50(44);983.
- Morbidity and Mortality Weekly Report, Oct 19, 2001/50(41);897-898.
- Morbidity and Mortality Weekly Report, Oct 05, 2001/50(39);857.
- Morbidity and Mortality Weekly Report, Sept 28, 2001/50(38);830.
- Morbidity and Mortality Weekly Report, Sept 21, 2001/50(37);805.
- Morbidity and Mortality Weekly Report, Jul 27, 2001/50(29);617-619.
- Morbidity and Mortality Weekly Report, Apr 13, 2001/50(14);265-268.
- Morbidity and Mortality Weekly Report, Jan 26, 2001/50(03);37-39.
- Morbidity and Mortality Weekly Report, Nov 24, 2000/49(46);1044-1047.
