Lyme disease cases double in U.S.: CDC
With warmer winters, deer ticks can reproduce more frequently
and transmit the bacteria that cause Lyme disease. A lack of natural predators that normally hunt deer, such as wolves and
mountain lions, also allows deer to flourish.
WASHINGTON (Reuters) - The number of cases of Lyme disease has doubled
in the United States since 1991 and these numbers are probably underestimated, the Centers for Disease Control and Prevention
said on Thursday.
More than 21,000 cases of the tick-borne disease are now reported every year, the CDC said, making
it the most common illness transmitted by bugs or animals in the United States.
The northeastern states had the most
cases, with 2,335 cases reported in Massachusetts in 2005, 3,363 in New Jersey, 5,565 in New York, and 4,287 in Pennsylvania.
increase likely is the result of several factors, including a true increase in disease incidence and enhanced case detection
resulting from implementation of laboratory-based surveillance in several states," the CDC said in its weekly report on death
Lyme disease, marked by a characteristic rash and joint pain, can cause long-term effects if not treated
with antibiotics. They can include arthritis, heart disease and nervous system damage.
It is caused by bacteria called
Borrelia burgdorferi and is easily treated with antibiotics.
The CDC said a Lyme disease vaccine was once available
but was taken off the market in 2002, after the company that made it reported poor sales.
"Persons can lower their
risk for the disease and other tick-borne illnesses by avoiding tick-infested areas when possible, using insect repellents
containing DEET, and performing daily self-examination for ticks," the CDC advised.
Picking the ticks off within 24
hours also makes them less likely to transmit the bacteria.
"Tick populations around homes and in recreational areas
can be reduced 50 percent to 90 percent through simple landscaping practices such as removing brush and leaf litter or creating
a buffer zone of wood chips or gravel between forest and lawn or recreational areas," the CDC said.