Information Digest 8

(Mosquito-borne diseases, new techniques for control & other items)

Collected & edited by Dr. Rui-De Xue, AMCD, 904/471-3107; www.anastasiamcd.org

October 5, 2004

News:

      Aerial mosquito spraying (Dibrom, activity ingredient is naled) for 234,600 acres in St. Johns County at night of October 4. CDC collected human urine samples for the chemical study.

     A study showed that WNV human cases in the area with mosquito control districts were significantly lower than the area without mosquito control districts in Michigan.

      The estimated cost of the Louisiana epidemic of WNV (329 human cases) was $20.1 millions from June 2002 to Feb 2003.

      CDC decided to fund 6 WNV grant applications (1. WNV: Neurobehavioral & functional outcome; 2. WNV genotypic affect on host competence; 3. Analysis of SNPs associated with WNV-induced disease; 4. Natural history & pathogenesis of WNV in viremic donors; 5. Aedes vexans, Oc. triseriatus & the ecology of WNV; and 6. Ecology of WNV in the Southeastern USA) after reviewing process of >70 applications.

      California group viruses were isolated from 2 more pools of Psorophora columbiae (8/12) and Ochlerotatus atlanticus (8/19) in St. Johns County. One WN positive from a pool of Culex nigripalpus in Duval County.

       A researcher reported that mosquito blood-fed from native birds was more successful than from the migrated birds in HI.

 USA: WNV (October 1, 2004): Human cases 1,821 (59 deaths). 159 blood donors with WNV positive. Dead Birds: 4400 corvids & 1054 other birds. Horses: 759 cases. Sentinel Chickens: 858 positive for WNV.

 Florida: WNV (October1, 2004):  33 human cases including 2 deaths.

 St. Johns County:  WNV: 5 positive sentinel chickens, 4 more suspected last week

                                 EEE:  11 positive sentinel chickens.

                 Mosquito pool: California Group Virus isolated on July 1, Aug 2 & 16, 2004.

Neighbor Counties:

   Duval:    4 chickens positive for WNV, 6 human cases for WNV, under medical alter. 1     

                 WNV positive pool of Cx. nigripalpus, 9/14.

   Flagler:  6 chickens positive for EEE.

   Putnam: 3 chickens positive for WNV, 1 sentinel chicken & 1 horse positive for EEE.

   Nassau: 5 chickens positive for WNV, 1 horse and 10 chickens for EEE.   

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Information Digest 7

(Mosquito-borne diseases, new techniques for control & other items)

Collected & edited by Dr. Rui-De Xue, AMCD, 904/471-3107; www.anastasiamcd.org

 September 23, 2004

 News:

      DOACS (9/21/04) urges Floridians to protect themselves and animals against mosquitoes.

      Recently 3 EEE human cases in Massachusetts, 2 of them have died.

     Florida and Alabama strains of Aedes albopictus developed resistance to insecticides slowly (JME 41:946, 2004).

        Dr. William C. Reeves, the world’s foremost authority on arbovirus from UC Berkeley, has died on September 19, 2004 and at age of 87.

      Indian scientists found Japanese Encephalitis vector mosquitoes Culex tritaeniorhynchus started to change their resting behavior from outdoor to indoor.

   USA:

 WNV (September 21, 2004): Human cases 1,604 (48 deaths).

  Florida:  

 WNV (September 17, 2004):  32 human cases including 2 deaths (Miami-Dade with 17, Sarasota, Hillsborough, Broward, Gadsden, Duval with 6, Pinellas, and Brevard). Six counties are under medical alters for mosquito-borne diseases.

   St. Johns County:  WNV: 3 positive sentinel chickens from P.V. area within 2 wks

                                 EEE:  11 positive sentinel chickens.

                                 Mosquito pool: California Group Virus isolated on July 1, 2004.

 Neighbor Counties:

     Duval:    6 human cases for WNV, under medical alter.

     Flagler:  6 positive chickens for EEE.

    Putnam: 3 positive chickens for WNV, 1 sentinel chicken & 1 horse positive for EEE.

    Nassau: 3 positive chickens for WNV, 1 horse and 8 chickens for EEE.   

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Information Digest 6

(Mosquito-borne diseases, new techniques for control & other items)

Collected & edited by Dr. Rui-De Xue, AMCD, 904/471-3107; www.anastasiamcd.org

 September 16, 2004

 News:

     Hurricane Ivan slams Alabama, killing 12; Jeanne (#5) makes landfall in Puerto Rico, killing 2.

     Two pilots killed in crash of plane spraying for mosquitoes in Polk County

      Local mosquito population increases again after Frances.

     DOACS, Florida urges vaccinations to protect your horses from WNV & EEE

     Duval County has 6 human cases of WNV

     Roach Busters of America, Inc.’s owner (south Florida) has been arrested for     

     operating without a license.

    USA:

 WNV (September 14, 2004): Human cases 1,386 (35 deaths).

 Florida:  

 WNV (September 14, 2004):  30 human cases (Miami-Dade with 17, Sarasota, Hillsborough, Broward, Gadsden, Duval with 6, and Brevard). Six counties are under medical alters for mosquito-borne diseases.

 St. Johns County:  WNV: 3 positive sentinel chickens from P.V. area within 2 wks

                                 EEE:  11 positive sentinel chickens.

                                 Mosquito pool: California Group Virus isolated on July 1, 2004.

 Neighbor Counties:

     Duval:    6 human cases for WNV, under medical alter.

     Flagler:  6 positive chickens for EEE.

    Putnam: 3 positive chickens for WNV, 1 sentinel chicken & 1 horse positive for EEE.

    Nassau: 3 positive chickens for WNV, 1 horse and 8 chickens for EEE.   

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Information Digest 5

(Mosquito-borne diseases, new techniques for control & other items)

Collected & edited by Dr. Rui-De Xue, AMCD, 904/471-3107; www.anastasiamcd.org

 September 8, 2004

News:

    Hurricane Frances brought a lot of raining & created more breeding sites to our area.

     Three positive sentinel chickens for WNV in St. Johns County (P.V. substation).

     WNV equine vaccines are safe for use to your horses (USDA/APHIS).

     La Crosse Encephalitis (mosquito transmitted), 2 human cases in Ohio.

     Annual Conference of the Society for Vector Ecology, Boston, September 26-29, 2004.  Contact Dr. Major Dhillon at 909/340-9792

      Believe It or Not, WNV does not usually appear to infect cattle.

USA:

 WNV (September 7, 2004): Human cases 1,191 (30 deaths). Answers for the 3 state names in last issue: A=Alaska, H=Hawaii, and W=Washington.

 Florida:  

 WNV (September 4, 2004):  26 human cases including 2 deaths (Miami-Dade, Sarasota, Hillsborough, Broward, Gadsden, Duval, and Brevard). Six counties are under medical alters for mosquito-borne diseases.

  St. Johns County:  WNV: 3 positive sentinel chickens from P.V. area.

                                 EEE:  10 positive sentinel chickens.

                                 Mosquito pool: California Group Virus isolated on July 1, 2004.

 Neighbor Counties:

     Duval:    3 human cases for WNV, under medical alter.

     Flagler:  6 positive chickens for EEE.

    Putnam: 3 positive chickens for WNV, 1 sentinel chicken & 1 horse positive for EEE.

    Nassau: 3 positive chickens for WNV, 1 horse and 8 chickens for EEE.   

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Information Digest 4

(Mosquito-borne diseases, new techniques for control & other items)

Collected & edited by Dr. Rui-De Xue, AMCD, 904/471-3107. www.anastasiamcd.org

 September 1, 2004

 News:

     Hurricane Frances maybe hit our area this weekend and keep eye on it.  

     WNV, 3 human cases in Duval County, 2 positive chickens in St. Johns County (P.V. area).

      Japan developed West Nile Vaccine, now the vaccine is going to clinical trial.

      Joint Salt Marsh Workshop/Mosquito Lagoon Conference, Cocoa Beach, October 12-15.  Contact Mr. Doug Scheidt at 321/476-4105.

      Spinosad is a naturally derived biorational insecticide. Mexican scientists first time report Spinosad could kill mosquito larvae at low concentration.     

      Believe It or Not, blood-engorging mosquitoes can invite their folks to come over for a free dinner.

 USA: WNV (up to August 30, 2004): Human cases 1053 (28 death); WNV found from 36 states; Avian, animal or mosquito infections found from other 11 states; only 3 states free of WNV (you guess the state names with A, H, and W letters).

 Florida:   WNV:  23 human cases including 2 deaths (15 from Miami, 2 from Sarasota, 1 from Hillsborough, 1 from Broward, 1 from Gadsden and 3 from Duval). Five counties under medical alter for mosquito-borne diseases.

                 EEE: No human case.

                SLE: No human case.

 St. Johns County:  WNV: No human case, 2 positive sentinel chickens from P.V. area.

                                EEE: No human case, 9 positive sentinel chickens.

                                Mosquito pool: No positive for this week.

Neighbor Counties:

   Duval: 3 human cases for WNV, under medical alter (provided by M. Clark)

   Flagler: No human case; 5 positive chickens for EEE.

   Putnam: No human case; 2 positive chickens for WNV, 1 sentinel chicken & 1 horse positive for EEE.   

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Information Digest 3

(Mosquito-borne diseases, new techniques for control & other items)

Collected & edited by Dr. Rui-De Xue, AMCD, 904/471-3107. www.anastasiamcd.org

 August 26, 2004

 News:

     Mosquito population in St. Johns County blew out this week due to recent rain fall.

     WNV hit Miami-Dade. Fourteen human cases with 1 death. Also, 3 viremic blood donors were identified.

     West Nile victims can sue Ontario Government: An Ontario Superior Court judge has ruled that a group of residents (45 families) who contracted the WNV in 2002 can sue the government for the way it handled the outbreak (not acting fast enough, did poor job).

     Landmark No-Spray Ordinance Passed in South Euclid (2004) & Lyndhurst (2003) Cities, Ohio. They primary emphasis on reducing breeding sources, using least-toxic larval & biological control, and public education for personal protection and mosquito prevention.

 USA: WNV (up to August 24, 2004): Human cases 843 (20 death)

 Florida:   WNV:  18 human cases (14 from Miami,  2 from Sarasota, 1 from Hillsborough, 1 from Jacksonville)

                 EEE: No human case.

                SLE: No human case.

 St. Johns County:  WNV: No human case & positive sentinel chicken

                                EEE: No human case, 9 positive sentinel chickens

                                Mosquito pool: California Group Virus isolated from mosquitoes

                                                          (confirmed).

 Neighbor Counties:

   Duval: 1 human case for WNV, under medical alter.

   Flagler: No human case; 5 positive chickens for EEE. 1 positive chicken for HJ virus.

   Putnam: No human case; 2 positive chickens for WNV, 1 sentinel chicken & 1 horse positive for EEE; 1 chicken for HJ virus positive.

   Nassau: No human case; 1positive chicken for WNV, 6 chickens & 1 horse for EEE positive, 2 chickens for HJ virus positive.

 

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Information Digest 2

(Mosquito-borne diseases, new techniques for control & other items)

Collected & edited by Dr. Rui-De Xue, AMCD, 904/471-3107. www.anastasiamcd.org

 August 19, 2004

 News:

     Mosquito Magnets significantly reduced biting rate at Marsh Creek, Magnolia Dunes, and Anastasia Lakes

     Hurricane did not destroy several mosquito control districts in Florida, but  created a lot of mosquito breeding sites.

     In 2003, 33 WNV human cases get the infectious from blood transfusion. So far, 55 blood donors have been found WNV positive in USA this year.

     In October 2003, 2 patients get WNV when they had received hemodialysis on the same day and on the same dialysis machine in George.

     Believe or not, recent publications (Med & Vet Entomol) showed that adult mosquitoes have memory.

     Dr. Ruide Xue will be profiled in Who’s Who in America (2005 edition, in print)

 USA: WNV (up to August 17, 2004): Human cases 689 (20 death)

 Florida:    WNV:  13 human cases (9 from Miami, medical alter, 2 from Sarasota, 1 from Hillsborough, medical alter, 1 from Jacksonville, medial alter)

                EEE: No human case.

               SLE: No human case.

 St. Johns County:  WNV: No human case & positive sentinel chicken

                                EEE: No human case, 7 sentinel chickens

                                Mosquito pool:  All negative

 Neighbor Counties:

   Duval: 1 human case for WNV, under medical alter.

   Flagler: No human case; 5 sentinel chickens positive for EEE.

   Putnam: No human case; 2 sentinel chickens for WNV positive, 1 horse positive for EEE

 

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Information Digest 1

(Mosquito-borne diseases, new techniques for control & other items)

Collected & edited by Dr. Rui-De Xue, AMCD, 904/471-3107, www.anastasiamcd.org

 August 11, 2004

 News: Aedes albopictus like to bite blood type O people. A Japanese study showed that O type blood people were more attract Ae. albopictus than other types (A, B, AB) of people (JME 41:796-799)

 Jamestown Canyon Virus was found from mosquitoes first time in NY state. It was found in Lee County, Florida a few years ago (James Burgess).

 Pesticide spraying did not cause increasing asthma visits. A study show that daily rates of asthma visits to hospitals were not associated with pyrethroid ground spraying for WNV control in New York city, 2000 summer.

 USA: WNV (up to August 6, 2004): Human cases 406 (7 death); 2046 positive dead birds, 253 positive sentinel chickens, and 131 positive horses.

 Florida:  WNV: 1.  human cases, 10 (7 from Miami, 2 from Sarasota, 1 from Jacksonville)

                       2. Animals (positive):  sentinel chickens (125), horses (2), dead birds (19), live wild birds (4).

 EEE:  No human case. Animal: Sentinel chickens (56), horses (23), live birds (9).

SLE: No human case. Animal: sentinel chickens (9).

 California Group Virus were detected in pools of mosquitoes, Oc. atlanticus from Sarasota and St. Johns

 St. Johns County:  WNV: No human case; 1 suspect sentinel chicken

                                EEE: No human case; 6 sentinel chickens, 1 suspect chicken

                                Mosquito pool: California group virus from Oc. atlanticus

 Neighbor Counties:

    Duval: 1 human case for WNV (July 6, provided by M. Clark).

       Not start for sentinel chickens. 

       Many adult Aedes aegypti have been collected by CDC traps with dry ice in July 2004 in JAX (provided by M. Clark).

    Flagler: No human case for WNV & EEE; 5 sentinel chickens positive for EEE.

    Putnam: No human case for arbovirus; 2 sentinel chickens for WNV positive