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>> HAVE YOU FOUND YOURSELF SWATTING AWAY MOSQUITOES MORE SO
THIS YEAR. YOU SHOULD STAY TUNED FOR HEALTH
WATCH. >> HELLO.
I'M TERRANCE AND THIS IS HEALTH WATCH.
WHEN IT RAINS AS MUCH AS IT HAS WATER CAN COLLECT ANYWHERE.
ABANDONED TIRES. BIRD BATHS.
AND TOPS AND FLAT ROOFS. ETC., ETC., ETC.
BUT IT CAN BE A PROLIFIC BREEDING GROUND FOR MOSQUITOES.
ANNOYING PESTS AND MAKING NARY A SOUND AND THEN TAKEN FLIGHT
BEFORE YOU CAN SQUASH THEM. YET THEY CAN BE HARBINGERS OF
DISEASES. PROTECTING YOURSELF IS SERIOUS
BUSINESS AND THE DEPARTMENT OF PUBLIC HEALTH IS UP TO THE
TAKES. JOINING ME ARE TWO GUESTS FROM
THE NORFOLK DEPARTMENT OF PUBLIC HEALTH.
WELCOME TO HEALTH WATCH, GUYS. >> THANK YOU.
>> WE CAN ALSO ADD WESTERN EQUINE ENCEPHALITIS TO THE LIST.
BUT I WANT TO TALK ABOUT WEST NILE VIRUS.
THEY TEND TO BE MORE PREVALENT IN THE AREA.
WHAT ARE THE SYMPTOMS OF WEST NILE VIRUS?
>> HIGH FEVER, HEADACHE. STIFF NECK.
DISORIENTATION. CONVULSIONS.
VISION LOSS AND NUMBNESS AND PARALYSES.
IT'S IMPORTANT TO NOTE THAT ONE OUT OF 150 PEOPLE EXHIBIT THOSE
TYPE OF SYMPTOMS. THEY CAN LAST FOR SEVERAL WEEKS
AND THE NEUROLOGICAL EFFECTS CAN BE PERMANENT.
>> LET'S TALK ABOUT THE MILDER CASES.
>> THE MILDER AFFECT ABOUT 20% OF PEOPLE.
MANUFACTURE THEM MILDER SYMPTOMS ARE FEVER, HEADACHES.
NAUSEA, VOMITING. COULD LAST UP TO SEVERAL WEEKS.
>> ISN'T IT TRUE THAT SOME PEOPLE WILL SHOW NO SYMPTOMS AT
ALL? >> YEAH.
ABOUT 80% OF PEOPLE DON'T SHOW ANY SUMS.
-- OF SYMPTOMS. >> HOW IS WEST NILE VIRUS
SPREAD? >> THROUGH THE BITE OF AN
INFECTED MOSQUITO. INFECTED MOSQUITOES BITE HUMANS
AND OTHER ANIMALS AND IT CAN BE SPREAD BY OTHER MEANS SUCH AS
BLOOD TRANSFUSION. TRANS PLANTS.
BREASTFEEDING. AND EVEN FROM MOTHER TO BABY
DURING PREGNANCY. 10 WEST NILE VIRUS IS NOT SPREAD
THROUGH CASUAL CONTACT SUCH AS TOUCHING OR KISSING.
>> SO WHEN SOMEONE STARTS THOUGH SHOW SYMPTOMS HOW SOON ARE THEY
GENERALLY DIAGNOSED? >> THREE TO FOUR DAYS AFTER
BEING INFECTED. >> IN TREATMENTS FOR WEST NILE
VIRUS? >> NO SPECIFIC TREATMENT FOR
WEST NILE VIRUS INFECTIONS. FAVOR AND ACHES THAT CAN OCCUR
IN MILDER CASES -- BUT IN SEVERE CASES PEOPLE NEED TO GO TO THE
HOSPITAL WHERE THEY CAN RECEIVE SUPPORTIVE TREATMENT SUCH AS
FLUIDS, ASSISTANCE WITH BREATHING AND NURSING CARE.
>> AS I WAS TALKING TO BRIAN I MENTIONED THERE ARE TWO THAT CAN
BE A PROBLEM IN THE AREA IN THE U.S. ANY WAY.
EEE. WHAT IS EEE?
>> IT'S RARE. ONLY A FEW CASE THAT'S ARE
REPORTED IN THE UNITED STATES EVERY YEAR AND WE ACTUALLY HAD A
LOCAL CASE LAST YEAR IN PORTSMOUTH OF 2012.
>> IN PORTSMOUTH? >> YES.
>> THERE WERE TWO OTHER CASES ELSEWHERE IN VIRGINIA.
>> YES. I'M NOT SURE OF THE YEAR BUT
ALSO IN PORTSMOUTH AND THAT WAS SEVERAL YEARS AGO A GO.
MOST CASES OCCUR IN THE ATLANTIC AND GULF COAST STATES.
MOST PEOPLE THAT ARE INFECTED DON'T HAVE ANY APPARENT ILLNESS.
SOMETIMES INFLAMMATION OF THE BRAIN AND SEVERE CASES BEGIN
WITH A SUDDEN ON ONSET OF HEADACHE AND FEVER AND CHILLS
AND VOMITING AND POSSIBLY SEIZURES AND COMA.
VERY SERIOUS. IT HAS A HIGH MORTALITY RATE
ALMOST 33%. AND THOSE PEOPLE WHO DO SURVIVE
CAN HAVE LIFELONG COMPLICATIONS SUCH AS BRAIN DAMAGE.
-- AND THERE IS NO TREATMENT FOR EEE.
>> THERE IS NOT ANY OF REAL KIND OF TREATMENT.
WHAT ABOUT LACROSSE? >> SURE.
IT OCCURS IN MIDWEST AND SOUTHEASTERN STATES AND IN
VIRGINIA AS WELL. ONCE AGAIN MOST INFECTED PEOPLE
WILL HAVE NO SYMPTOMS. BUT IF THERE ARE SYMPTOMS THEY
USUALLY INCLUDE FAVOR, HEADACHE, VOMITING, NAUSEA AND FATIGUE.
IT AFFECTS THE NERVOUS SYSTEM. SEVERE ENCEPHALITIS CAN SHOW PA
-- PARALYSES AND THERE IS NO TREATMENT.
>> ANY INSIGHT AS TO WHY THE GREATER PREVALENCE IS IN
CHILDREN? >> I DON'T KNOW WHAT THE
REASONING IS. MAYBE THE IMMUNE SYSTEM.
IT COULD BE A NUMBER OF REASONS. >> THAT COULD BE.
BECAUSE THE IMMUNE SYSTEMS MAY NOT HAVE FULLY DEVELOPED.
ANOTHER ONE IS SOMETHING THAT FOR WHEN MOST PEOPLE THINK OF
MOSQUITO BOURNE DISEASES THEY THINK OF MALARIA.
HAVE WE BEATEN MALARIA? WHAT IS GOING ON THERE?
>> THE UNITED STATES -- ESPECIALLY HERE IN VIRGINIA WE
HAVE TWO CASES OF MALARIA OF RECENT YEARS.
AND THAT IS UNUSUAL. MOST CASES COME FROM PEOPLE WHO
HAVE TRAVELED OUTSIDE THE UNITED STATES.
AND WORLDWIDE IT'S A HUGE ISSUE. IN 2010 THERE WERE 216 MILLION
CASES. AND OF THOSE CASE BESS 655,000
PEOPLE DIED AND 91 PERCENT OCCURRED IN AFRICA.
AND SYMPTOMS CAN INCLUDE FEVER, CHILLS AND FLU-LIKE ILLNESS.
LEFT UNTREATED COMPLICATIONS CAN BECOME VERY SERIOUS AND RESULT
IN DEATH. >> SO IN THE UNITED STATES WE --
HAVE BETTER PREVENTIVE MODALITIES.
>> CORRECT. WE HAVE BETTER PREVENTIVE
MEASURES. WE HAVE MOSQUITOES THAT CAN
CARRY MALARIA BUT IT'S NOMINATE I HAVE IN OUR MOSQUITO
POPULATION. >> WE'VE GOTTEN EVERYBODY'S
ATTENTION SO LET'S GET INTO THE THICK OF THINGS IN TERMS OF WHAT
PEOPLE CAN DO TO PREVENT BEING BIT BY MOSQUITOES AND RECENTLY
ONE OF THE PRODUCEERS WENT WITH ONE OF THE FOGGERS.
AND I WANT TO THANK YOU FOR THE FOOTAGE.
SO I WOULD LIKE YOU TO TELL US ABOUT THIS PROCESS, THE FOGGING
PROCESS. >> SURE.
>> LET'S ROLL THE TAPE, GUYS. >> HERE IN NORFOLK, WE TEND TO
FOG IN LATE EVENING OR EARLY MORNING WHEN THE MOSQUITOES ARE
ACTIVE. WE USE AN ULTRA LOW VOLUME
FOGGER. IT HAS A SMALL DROPLET SIZE AND
THE REASON WE USE THIS IS SO THAT WE DON'T HARM NONTARGET
SPECIES LIKE LARGER BUGS AND BEES.
THE DROPLET SIZE IS SMALL AND IT'S NOT GOING TO HURT ANY OTHER
TYPE OF BUGS. >> THAT IS INTERESTING.
THE SIZE OF THE DROPLETS IN THE FOG IS DESIGNED TO PREVENT
IMPACTING OTHER INSECTS. LARGER INSECTS, THE DROPLETS ARE
SO SMALL THAT THE AIRS GOING TO PUSH IT AWAY SO THE ACTUALLY
MOSQUITO IT'S ALMOST LIKE THE PERFECT SIZE AND IT WILL HIT THE
MOSQUITO. >> HAD NO IDEA IT WAS THAT
SOPHISTICATED. >> ER WEIGH TARGETING ADULT
MOSQUITOES. NOT ACTUAL -- MOSQUITO LARVA.
AND IT'S LEAST EFFECTIVE WAY OF CONTROLLING MOSQUITOES.
>> AS WE WERE LOOKING AT THE FOOTAGE EARLIER ONE OF THE KEY
PEOPLE IN THE STUDIO COMMENTED THAT THE MOSQUITO FOGGER IN THE
NEIGHBORHOOD -- PLAYS ICE CREAM MUSIC.
THAT WOULD BE A VERY GOOD THING TO DO.
MAYBE ALL OF THE KIDS WILL RUN TO THE MESQUITE TRUCK AND WE
DON'T WANT THAT. >> WHAT ELSE -- YOU ARE WITH
VECTOR AND I WOULD ASK EITHER ONE OF YOU TO RESPOND.
WHAT ELSE DOES VECTOR CONTROL DO IN TERMS OF MOSQUITO PREVENTION.
THERE IS A FAIR AMOUNT OF ELIMINATING STANDING WATER.
>> DITCHES. WE GO THROUGH IN THE WINTER TIME
AND CLEAR OUT TIDAL DITCHES TO AMERICA SURE THERE IS NO
STANDING WATER TO ELIMINATE THE BREEDING.
WE CLEAR OUT ROADSIDE DITCHES. GO TO PEOPLE'S HOUSES AND MAYBE
HELP EDUCATE THEM ON TURNING OVER MAN MADE CONTAINERS.
JUNK YARDS, WE'LL TREAT THEM. THE STANDING WATER THAT CANNOT
BE DUMPED OR IF SOMETHING NEEDS TO BE DUMPED WE'LL DUMP IT.
EULAMINATE TIRE PILES AND WE TREAT STORM DRAINS.
>> THE LAST TIME YOU WERE ON WE HAD SOME PRETTY INTERESTING
MOSQUITO TRAPS. A LIGHT TRAP AND I CAN REMEMBER
-- THERE WERE TWO OTHERS. >> CORRECT.
>> WE'RE GOING TO TAKE A BREAK AND THAT IS MOSQUITO
SURVEILLANCE. WHEN WE COME BACK, WE'LL SHOW
OUR AUDIENCE THE MOSQUITO TRAPS. ALL RIGHT.
GUYS, WE WANT TO ASK YOU TO PLEASE STICK AROUND AND WE'LL
RETURN AND SEE SOME PRETTY INTERESTING CONTRAPTIONSES THAT
WILL ENSURE YOU THAT THE DEPARTMENT OF PUBLIC HEALTH IS
ON THE JOB WHEN IT COMES TO THE PESKY MOSQUITOES.
STAY TUNED. >> THANK YOU FOR STICKING ROUND.
WELCOME TO OUR SHOW AND TELL. PENNY, TELL US ABOUT THESE TRAPS
AND HOW THEY WORK. >> I WOULD BE HAPPY TO.
THIS IS OUR MOST BASIC TRAP. A CALLED A CC LIGHT OF TRAP.
THE ONE THAT WE USE THE MOST. ON A REGULAR BASIS.
WE SET ABOUT 24 OF THESE. THE WAY IT WORKS -- IS IT HAS A
LIGHT UP HERE IN THE TOP AND THAT IS ONE WAY THAT ATTRACT
ESKIMO SKEETS ON AND THE SECOND WAY IS THIS COOLER WE FILL WITH
DRY ICE AND AS THE NIGHT GOES ON IT GIVES OFF CARBON DIOXIDE SO
THE MOSQUITOES THINK THERE IS SOMETHING THERE COMING AND
LOOKING FOR A BLOOD MEAL AND THE FAN PULLS THEM DOWN.
THIS IS RUNNING OFF A BATTERY FOR ABOUT 12 HOURS A NIGHT AND
THIS CATCH IS A VARIETY OF SPECIES.
ANYTHING LOOKING FOR A BLOOD MEAL WILL COME TO THIS TRAP.
>> AND WHAT ARE THE THREE DIFFERENT SPECIES THAT YOU
CATCH? I WAS PRETTY IMPRESSED.
>> WE GET ABOUT 25 SPECIES. SO IT COULD BE ANY NUMBER OF
THINGS. WE GET MALARIA MOSQUITOES.
COULD YOU -- CULEX MOSQUITOES. >> AND YOU COUNT THOSE
MOSQUITOES? >> YES DO.
WE COUNT THEM AND THEN IF THEY ARE POTENTIAL -- VEHICLORS OF
DISEASE WE'RE TEST THEM. >> AND YOU COUNT THEM --
>> AND ELIGIBLE THAT WE DO WITH SURVEILLANCE AFFECTS OUR CONTROL
OPERATIONS AS WELL. >> I SEE.
AND WHAT ABOUT THIS ONE? ARE WE DONE HERE?
THIS IS CALLED A GRAB IT TRAP AND THIS IS TARGETING FEMALE
MOSQUITOES THAT HAVE TAKEN A BLOOD MEAL AND NOW THEY HAVE
EGGS. THIS TRAP WILL HAVE ABOUT AN
INCH OF WATER IN THE BOTTOM. A COMBINES OF TAP WATER AND A
LITTLE BIT OF STRAW. THE MOSQUITOES LIKE HIGH ORGANIC
MATTER SO WE TAKE THAT COMBINATION AND LEAVE IT OUT IN
THE SUN FOR ABOUT A WEEK AND IT BECOMES ATTRACTIVE TO THE
MOSQUITOES. >> HOW DO YOU KNOW WHAT TO USE
TO ATTRACT THE FEMALE MOSQUITOES?
>> THEY ARE ALL GOLD DIGGERS. -- YEARS OF RESEARCH PEOPLE HAVE
FOUND OUT WHAT IS THE BEST WAY. AND DIFFERENT MOSQUITOES LIKE
DIFFERENT WATER SOURCES. THIS ATTRACTS CULEX MOSQUITOES
AND THAT IS IMPORTANT BECAUSE THEY CARRY WEST NILE VIRUSES AND
EEE. >> AND THE CULEX -- THE FEMALE
MOSQUITO -- >> THEY COME IN TO LAY THEIR
EGGS. SO THEY'VE TAKEN A BLOOD MEAL
AND POSSIBLY PICKED UP WEST NILE VIRUS OR EEE.
AND NOW WE'RE CATCHING THEM IN THE TRAP AND WE TEST THOSE THE
MOST BECAUSE THEY ARE THE MOST LIKELY TO HAVE A DISEASE.
>> AND THIS IS GRAVID. >> YES.
AND THE LAST ONE IS CALLED A BG SENTINEL TRAP.
>> AND THAT IS THE ONE THAT HAS THE STRIPES.
>> AND IT IS THE BIGGEST NUISANCE MOSQUITO.
SO THIS TRAP IT SITS ON THE GROUND AND THROUGH RESEARCH THEY
HAVE FOUND THAT MOTET SKEETS ON ARE ATTRACTED TO DARK SURFACES.
AND INSIDE OF THE TRAP IS A FAN PULLING THEM DOWN AND IT USES A
SPECIAL LURE. AND THE LURE IS DESIGNED TO
MIMIC THE CHEMICALS AND SMELLS OF HUMAN SKIN.
THERE IS A POCKET INSIDE THE TRAP WHERE THE LURE SITS.
AND YOU CAN SMELL IT IF YOU WOULD LIKE.
>> I'M NOT GOING TO GET -- >> NO.
>> THE MOSQUITOES THINK THEY ARE COMING ACROSS A HUMAN BEING.
>> THIS IS AN ESPECIALLY STRONG ONE.
AND THEY ARE ATTRACTED TO THE TRAP AND THE FAN PULLS THEM DOWN
SO WE CAN CATCH HUNDREDS OF ASIAN TIGER MOSQUITOES IN THIS
TRAP. >> YOU USE THESE FOR
SURVEILLANCE AS WELL. >> YES.
TO GET AS MANY SPECIES AND AS MANY NUMBERS AS WE CAN.
>> 25 DIFFERENT SPECIES WITH THE LIGHT TRAP.
>> THERE ARE TWO OR THREE SPECIES OF THE CULEX MOSQUITO.
>> AND ABOUT 90% IS ASIAN TIGER. >> WE'LL COME BACK OVER THIS WAY
AND I WANT TO ASK A KIM OF OTHER QUESTIONS.
DO PLEASE FEEL FREE TO CHIME N. SO BRIAN -- WHAT CAN OUR VIEWERS
DO TO PROTECT THEIR PROPERTY? TO PREPARE THEIR PROPERTY TO
PREVENT THE ONSLAUGHT OF MOSQUITOES?
>> TURN OVER ANY TYPE OF CONTAINERS THAT CAN COLLECT
WATER SUCH AS WHEEL BARRELS, FLOWER POTS.
POOLS. THINGS THAT WILL COLLECT WATER
WHERE MOSQUITOES CAN BREED AT. WE WANT TO ELIMINATE WATER 0
TARPS AND FOOT ROOFS. CLEAN OUT BIRD OF BATHS AND
WADING POOLS AND CLEAN ROOF AND GUTTERS AND DOWNSPOUTS.
BECAUSE SOMETIMES THEY GET CLOGGED UP.
>> AND AGAIN THE QUESTION -- HOW CAN WE BEST PREVENT MOSQUITO
BITES? >> CHECK YOUR WINDOWS AND DOOR
SCREENS IN THE HOUSE TO MAKE SURE MOSQUITOES ARE NOT
ENTERING. WEAR LONG AND LOSE AND
LIGHT-COLORED CLOTHING. LIMIT OUTDOOR EXPOSURE DURING
EVENING AND MORNING TIMES. AND USE AN INSECT REPELLENT.
WITH THE LOWEST DEET RATING FOR THE LENGTH OF TIME.
>> AS OUR RESIDENT EXPERT I WANT TO COME BACK TO YOU BEFORE WE
GET TO THE CLOSING -- WE HAVE THREE DIFFERENT THINGS THAT WE
USE TO ATTRACT MOSQUITOES. LIGHT, AND THIS IS ACTUALLY HAS
WATER IN IT WITH THE STRAW. AND THE LAST ONE HERE IS WITH
THE PUNGENT ODOR. >> THE CHEMICAL LURE.
>> AND THEY ATTRACT DIFFERENT TYPES OF MOSQUITOES.
THE ASIAN TIGER MOSQUITO -- IS THERE -- IS IT LEAST LIKELY TO
HAVE A MOSQUITO BORN DISEASE. >> THEY HAVE THE POTENTIAL TO
CARRY MOSQUITO BOURNE DISEASE. THE WEST NILE VIRUS EXIST MAINLY
IN THE BIRD POPULATION. SO DIFFERENT MOSQUITOES HAVE
DIFFERENT HOSTS. THIS ONE DOES NOT FEED ON BIRDS
AS MUCHING AOTHER ANIMALS AND HUMANS.
YOU CAN GET A SITUATION THAT IS QUITE DANGEROUS.
>> IS THERE A PARTICULAR TYPE OF BIRD THAT THE MOSQUITO BITES?
A PARTICULAR TYPE OF BIRD? >> I BELIEVE WEST NILE VIRUS IS
PRETTY EVASIVE IN THE BIRD POPULATION.
THOSE BIRD POPULATIONS HAVE BUILT UP AN IMMUNITY NOW AND
DON'T TEND TO DIE FROM THE DISEASE.
>> I SEE. BEFORE WE RUN OUT OF TIME HOW
CAN PEOPLE REACH THE VECTOR CONTROL OFFICE AND THERE IS A
MOSQUITO FOGGING HOT LINE. >> SURE.
IF PEOPLE HAVE CONCERNS OR QUESTIONS THEY CAN CONTACT OUR
OFFICE. 757-683-2840 AND WE ALSO HAVE A
MOSQUITO FOGGING HOT LINE AND IT HAS A RECORDED MESSAGE TO LET
PEOPLE KNOW WHERE WE'RE GOING FOGGING.
>> OKAY. AND ANOTHER THING I WOULD LIKE
TO ASK IS THAT WE TALKED EARLIER AND IT APPEARS THAT YOU GUYS YOU
DO YOUR WORK BETWEEN WHAT IS IT -- THROUGH NOVEMBER?
WHAT PERIOD OF TIME ARE YOU MOST ACTIVE?
>> SURE. BETWEEN APRIL AND NOVEMBER.
AND THAT IS WHEN WE WILL BE LOOKING FOR MOSQUITO LARVA AND
USING THE FOG TRUCKS. MOSQUITO SURVEILLANCE AND DURING
THE COLDER MONTHS DOING TIDAL DITCH MAINTENANCE AND THAT
PREVENTS THE SALT MARSH MOSQUITOES TO BREED.
>> ARE THESE THREE TRAPS -- IS THERE ONE THAT YOU FEEL IS NOT
NECESSARILY MORE EFFECTIVE -- BUT ONES THAT YOU FIND MORE
INTERESTING. >> FOR ME I RELY ON GRAVID TRAPS
BECAUSE I WANT TO TEST FOR DISEASES.
SO I RELY ON THE TRAPS. THE LIGHT TRAPS ARE USEFUL WHEN
WE TALK ABOUT FOGGING BECAUSE THIS GIVES ME A PICTURE OF THE
WHOLE MOSQUITO POPULATION AND THIS TRAP IS GOOD FOR GAUGING
THE PROBLEM THAT YOU HAVE IN THE BACKYARD.
THIS IS GOOD TO PUT IN YOUR BACKYARD TO SEE IF YOU HAVE A
PROBLEM WITH ASIAN TIGER MOSQUITOES.
>> DON'T YOU USE SENTINEL CHICKENS AS WELL.
>> IT'S FOR DISEASE SURVEILLANCE AGAIN AND SO WE HAVE SMALL
CHICKEN FLOCKS AND WE GO TO THE CHICKENS AND WE TAKE A BLOOD
SAMPLE AND THAT IS THEN TESTED FOR EEE AND WEST NILE VIRUS.
THE CHICKINGS ARE IMMUNE AND THEY PRODUCE ANTIBODIES.
>> THE MOSQUITOES THAT HAVE BIT IN THE BIRD THAT CARRIES THE
VIRUS THEN ALSO BITE THE CHICKENS AND THEN ONCE YOU TEST
THE SENTINEL CHICKEN -- THAT IS HOW YOU CAN DETERMINE THE
PREVALENCE OF THE DISEASE. >> CORRECT.
>> FANTASTIC. ALWAYS VERY INTERESTING AND I
DEFINITELY DO LIKE SHOW AND TELL.
AND AGAIN THANK YOU SO VERY MUCH FOR JOINING US TODAY.
IF YOU HAVE A QUESTION ABOUT MOSQUITO PREVENTION ACTIVITIES
CONTACT YOUR LOCAL DEPARTMENT OF PUBLIC HEALTH.
YOU CAN ALWAYS CATCH PREVIOUS EDITIONS ON-LINE.
IF YOU WOULD LIKE TO DROP ME A LINE E-MAIL ME.
THIS HAS BEEN HEALTH WATCH.