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Ular derik kayu secara tidak langsung bermanfaat bagi kesehatan manusia : predator yang membantu memeriksa penyakit Lyme

Date:

August 6, 2013

Source:

University of Maryland

Summary:

Ahli biologi menemukan ular derik kayu , yang memangsa tikus dan mamalia kecil lainnya , membantu memeriksa eksposur manusia ' untuk penyakit tick-borne lyme.....read more

Timber rattlesnakes indirectly benefit
human health: Not-so-horrid top predator helps check Lyme disease

Date:

August 6, 2013

Source:

University of Maryland

Summary:

Biologists found timber rattlesnakes, which prey on mice and other small
mammals, help check humans' exposure to the tick-borne Lyme disease.

.............................

The scientific name of the timber rattlesnake, Crotalus horridus, is a sign of the fear and loathing
this native North American viper has inspired. But research by a team of
University of Maryland biologists shows the timber rattlesnake indirectly
benefits humankind by keeping Lyme disease in check.

The team's findings, to be presented today in a talk at the annual
conference of the Ecological Society of America, highlight the potential
benefits of conserving all species -- even those some people dislike.

Human cases of Lyme disease, a bacterial illness that can cause serious
neurological problems if left untreated, are on the rise. The disease is spread
by black-legged ticks, which feed on infected mice and other small mammals.
Foxes and other mammal predators help control the disease by keeping small
mammal populations in check. The decline of these mammal predators may be a
factor in Lyme disease's prevalence among humans.

Timber rattlers are also top predators in Eastern forests, and their
numbers are also falling, so former University of Maryland graduate student
Edward Kabay wanted to know whether the rattlers also play a role in
controlling Lyme disease.

Kabay used published studies of timber rattlers' diets at four Eastern
forest sites to estimate the number of small mammals the snakes consume, and
matched that with information on the average number of ticks each small mammal
carried. The results showed that each timber rattler removed 2,500-4,500 ticks
from each site annually.

Because not every human bitten by an infected tick develops Lyme disease,
the team did not estimate how many people are spared the disease because of the
ecosystem service that timber rattlesnakes provide. But Kabay, who is now a
science teacher at East Chapel Hill High School, and his research colleagues
will talk about the human health implications of their work on Aug. 6.

Timber rattlesnakes are listed as endangered in six states and threatened in
five more under the Endangered Species Act.

"Habitat loss, road kills, and people killing them out of fear are the
big issues," said University of Maryland Associate Biology Prof. Karen
Lips. "They are non-aggressive and rarely bite unless provoked or stepped
upon."

Lips, who directs UMD's graduate program in sustainable development and
conservation biology, will answer reporters' questions in the ESA press room
after the session ends.







Story Source:

The above story is based on materials provided
by University of Maryland. Note:
Materials may be edited for content and length.

http://www.sciencedaily.com/releases/2013/08/130806091815.htm

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