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Vampire Bats Biting People | National Geographic


much like their mythical namesakes

much like their mythical namesakes vampire bats must feast on fresh blood

vampire bats must feast on fresh blood

vampire bats must feast on fresh blood every two to three days or die of

every two to three days or die of

every two to three days or die of starvation they seek out warm-blooded

starvation they seek out warm-blooded

starvation they seek out warm-blooded mammals thriving off domestic livestock

mammals thriving off domestic livestock

mammals thriving off domestic livestock living in the tropical regions of South

living in the tropical regions of South

living in the tropical regions of South and Central America most victims never

and Central America most victims never

and Central America most victims never feel a thing

feel a thing

feel a thing in the bite itself is superficial but

in the bite itself is superficial but

in the bite itself is superficial but increasingly bats are targeting humans

increasingly bats are targeting humans

increasingly bats are targeting humans and the encounters are turning deadly

and the encounters are turning deadly

and the encounters are turning deadly the bats are blamed for rabies outbreaks

the bats are blamed for rabies outbreaks

the bats are blamed for rabies outbreaks in Peru a National Geographic grantee

in Peru a National Geographic grantee

in Peru a National Geographic grantee Daniel Stryker is researching the

Daniel Stryker is researching the

Daniel Stryker is researching the environmental causes and extent of the

environmental causes and extent of the

environmental causes and extent of the disease vampire bats are kind of the

disease vampire bats are kind of the

disease vampire bats are kind of the perfect storm of different ecological

perfect storm of different ecological

perfect storm of different ecological characteristics on the 110 these bats

characteristics on the 110 these bats

characteristics on the 110 these bats are feeding on larger mammals which are

are feeding on larger mammals which are

are feeding on larger mammals which are susceptible to rabies and in order to

susceptible to rabies and in order to

susceptible to rabies and in order to feed on these animals to drink their

feed on these animals to drink their

feed on these animals to drink their blood they have to bite inviting is also

blood they have to bite inviting is also

blood they have to bite inviting is also the main group of transmission and

the main group of transmission and

the main group of transmission and gravis virus striker is surveying

gravis virus striker is surveying

gravis virus striker is surveying vampire bats from the Amazon rainforest

vampire bats from the Amazon rainforest

vampire bats from the Amazon rainforest to the farms along the valleys of the

to the farms along the valleys of the

to the farms along the valleys of the Andes Mountains

Andes Mountains

Andes Mountains vampire bats are native to puristic but

vampire bats are native to puristic but

vampire bats are native to puristic but 500 years ago settlers imported an ideal

500 years ago settlers imported an ideal

500 years ago settlers imported an ideal food source cattle and as the number of

food source cattle and as the number of

food source cattle and as the number of livestock increases and spreads across

livestock increases and spreads across

livestock increases and spreads across the country so too does the population

the country so too does the population

the country so too does the population of vampire bats today large colonies

of vampire bats today large colonies

of vampire bats today large colonies thrive near areas devoted to ranching

yet despite the burgeoning bat

yet despite the burgeoning bat population it’s rare for people living

population it’s rare for people living

population it’s rare for people living in these agricultural areas to become

in these agricultural areas to become

in these agricultural areas to become infected with rabies rabies is a

infected with rabies rabies is a

infected with rabies rabies is a frightening and deadly disease a classic

frightening and deadly disease a classic

frightening and deadly disease a classic form of the disease turns even docile

form of the disease turns even docile

form of the disease turns even docile creatures into aggressors that folman

creatures into aggressors that folman

creatures into aggressors that folman the mound but the strain found in

the mound but the strain found in

the mound but the strain found in vampire bats is different it’s known as

vampire bats is different it’s known as

vampire bats is different it’s known as paralytic or dumb rabies causing

paralytic or dumb rabies causing

paralytic or dumb rabies causing disorientation muscle weakness and event

disorientation muscle weakness and event

disorientation muscle weakness and event yeah

to learn more he must turn the tables

to learn more he must turn the tables this time it’s a human taking blood from

this time it’s a human taking blood from

this time it’s a human taking blood from a vampire working at the Centers for

a vampire working at the Centers for

a vampire working at the Centers for Disease Control and Prevention or the

Disease Control and Prevention or the

Disease Control and Prevention or the CDC in Atlanta

CDC in Atlanta

CDC in Atlanta Streicher adds a lab strain of the

Streicher adds a lab strain of the

Streicher adds a lab strain of the rabies virus to blood samples he

rabies virus to blood samples he

rabies virus to blood samples he collected from vampire bats in Peru

collected from vampire bats in Peru

collected from vampire bats in Peru after an incubation period the test

after an incubation period the test

after an incubation period the test results will show which bats had been

results will show which bats had been

results will show which bats had been exposed to the rabies under the

exposed to the rabies under the

exposed to the rabies under the microscope fluorescent green dye

microscope fluorescent green dye

microscope fluorescent green dye indicates no antibodies present meaning

indicates no antibodies present meaning

indicates no antibodies present meaning the bat was free of disease but if the

the bat was free of disease but if the

the bat was free of disease but if the results come back clear bat has any

results come back clear bat has any

results come back clear bat has any bodies and Stryker knows the bat was

bodies and Stryker knows the bat was

bodies and Stryker knows the bat was exposed to rabies in the recent past so

exposed to rabies in the recent past so

exposed to rabies in the recent past so this is an important test for us because

this is an important test for us because

this is an important test for us because it allows us to first determine whether

it allows us to first determine whether

it allows us to first determine whether the virus is present or absent in a bat

the virus is present or absent in a bat

the virus is present or absent in a bat population and finally we can ask some

population and finally we can ask some

population and finally we can ask some questions at the population level

questions at the population level

questions at the population level specifically asking things like as you

specifically asking things like as you

specifically asking things like as you have more livestock in a given area do

have more livestock in a given area do

have more livestock in a given area do you see a higher proportion of bats that

you see a higher proportion of bats that

you see a higher proportion of bats that have been exposed to this virus

have been exposed to this virus

have been exposed to this virus preliminary results indicate the vampire

preliminary results indicate the vampire

preliminary results indicate the vampire bats from agricultural areas may

bats from agricultural areas may

bats from agricultural areas may actually have a higher rate of infection

actually have a higher rate of infection

actually have a higher rate of infection than do bats from other parts of the

than do bats from other parts of the

than do bats from other parts of the country so why then to so few people who

country so why then to so few people who

country so why then to so few people who live near cattle ranches fall ill the

live near cattle ranches fall ill the

live near cattle ranches fall ill the phrase if there are so many bats around

phrase if there are so many bats around

phrase if there are so many bats around infected with the disease Stryker

infected with the disease Stryker

infected with the disease Stryker believes that the livestock act as a

believes that the livestock act as a

believes that the livestock act as a buffer bats prefer passive herds to

buffer bats prefer passive herds to

buffer bats prefer passive herds to people reducing the attacks on people

people reducing the attacks on people

people reducing the attacks on people but as vampire bat populations increase

but as vampire bat populations increase

but as vampire bat populations increase and more livestock become infected this

and more livestock become infected this

and more livestock become infected this could pose a greater rabies threat to

could pose a greater rabies threat to

could pose a greater rabies threat to people in the future the same theory may

people in the future the same theory may

people in the future the same theory may explain why human rabies is more common

explain why human rabies is more common

explain why human rabies is more common in Peru’s Amazon rainforest here

in Peru’s Amazon rainforest here

in Peru’s Amazon rainforest here development such as long combining road

development such as long combining road

development such as long combining road construction is wiped out fast tracks of

construction is wiped out fast tracks of

construction is wiped out fast tracks of habitat and reduce wildlife populations

habitat and reduce wildlife populations

habitat and reduce wildlife populations and since there’s not much livestock in

and since there’s not much livestock in

and since there’s not much livestock in this area the bats turn to another food

this area the bats turn to another food

this area the bats turn to another food source humans

source humans

source humans there may be fewer infected bats but

there may be fewer infected bats but

there may be fewer infected bats but they bite people more frequently this be

they bite people more frequently this be

they bite people more frequently this be why the disease is far more common here

why the disease is far more common here

why the disease is far more common here than in the Angelus there’s much more to

than in the Angelus there’s much more to

than in the Angelus there’s much more to learn about how widespread rabies is

learn about how widespread rabies is

learn about how widespread rabies is among the countries bat populations what

among the countries bat populations what

among the countries bat populations what we don’t know is how this disease is

we don’t know is how this disease is

we don’t know is how this disease is persisting in the vampire bat so we and

persisting in the vampire bat so we and

persisting in the vampire bat so we and as a correlative that we don’t know

as a correlative that we don’t know

as a correlative that we don’t know where it is they’re part of us so again

where it is they’re part of us so again

where it is they’re part of us so again much more widespread potentially it’s

much more widespread potentially it’s

much more widespread potentially it’s it’s always present formations Stryker

it’s always present formations Stryker

it’s always present formations Stryker will continue to collect data hoping his

will continue to collect data hoping his

will continue to collect data hoping his research will eventually help predict

research will eventually help predict

research will eventually help predict where people will need to be vaccinated

where people will need to be vaccinated

where people will need to be vaccinated the more he learns about this

the more he learns about this

the more he learns about this frightening disease

frightening disease

frightening disease the chance we may someday be able to

the chance we may someday be able to

the chance we may someday be able to control it

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