Babesiosis
What is babesiosis?
Babesiosis is a rare, severe and sometimes fatal tick-borne disease
caused by various types of Babesia, a microscopic parasite that infects
red blood cells. In New York state, the causative parasite is
Babesia microti.
Who gets babesiosis?
While anyone can get babesiosis, it can be more severe in the
elderly, people who have had their spleen removed or in
immunocompromised individuals. Cases of this disease in the U.S. have
been primarily reported during spring, summer and fall in coastal areas
in the Northeast, including on Long Island in New York State, Nantucket
Island off the coast of Massachusetts and in New Jersey. Cases also have
been reported in the some upper Midwest states, including Wisconsin and
Minnesota, and in California, Georgia, Missouri and some European
countries.
How is babesiosis transmitted?
Babesiosis is transmitted by the bite of an infected deer tick,
Ixodes scapularis.
Transmission can also occur via transfusion of contaminated blood and
possibly from an infected mother to her baby during pregnancy or
delivery.
What are the symptoms of babesiosis?
The disease can cause fever, fatigue and hemolytic anemia lasting
from several days to several months. Infections can occur without
producing symptoms.
When do symptoms appear?
It may take from one to eight weeks, sometimes longer, for symptoms to appear.
Does past infection with babesiosis make a person immune?
It is not known whether past infection with babesiosis can make a person immune.
What is the treatment for babesiosis?
While many people do not become sick enough with babesiosis to
require treatment, there are effective therapies, usually either a
combination of quinine and clindamycin or a combination of atovaquone
and azithromycin. It is possible to become infected with babesiosis and
Lyme disease at the same time, so be sure to seek medical attention if
you become ill after a tick bite.
What can be done to prevent babesiosis?
When in tick-infested habitat - wooded and grassy areas - take
special precautions to prevent tick bites, such as wearing light-colored
clothing (for easy tick discovery) and tucking pants into socks and
shirt into pants. Check after every two to three hours of outdoor
activity for ticks on clothing or skin. Brush off any ticks on clothing
before skin attachment occurs. A thorough check of body surfaces for
attached ticks should be done at the end of the day. If removal of
attached ticks occurs within 36 hours, the risk of tick-borne infection
is minimal.
Repellents can be effective at reducing bites from ticks that can
transmit disease. But their use is not without risk of health effects,
especially if repellents are applied in large amounts or improperly.
Repellents commonly available to consumers contain the active
ingredients DEET (N, N-diethyl-m-toluamide), picaridin (also known as
KBR 3023), oil of lemon eucalyptus, permethrin, or botanical oils. DEET
products have been widely used for many years, but have occasionally
been associated with health effects. Skin reactions (particularly at
DEET concentrations of 50 percent and above) and eye irritation are the
most frequently reported health problems. Picaridin and oil of lemon
eucalyptus have been shown to offer long-lasting protection against
mosquitoes but there are limited data regarding their ability to repel
ticks. Products containing permethrin are for use on clothing only, not
on skin. Rather than acting as a repellent, permethrin kills ticks and
insects that come in contact with treated clothes. Permethrin can cause
eye irritation. Insect repellents containing botanical oils, such as oil
of geranium, cedar, lemongrass, soy or citronella are also available,
but there is limited information on their effectiveness and toxicity. If
you decide to use a repellent, use only what and how much you need for
your situation. In addition:
- Be sure to follow label directions.
- Use repellents only in small amounts, avoiding unnecessary repeat
application. Try to reduce the use of repellents by dressing in long
sleeves and pants tucked into socks or boots.
- Children may be at greater risk for reactions to repellents, in
part, because their exposure may be greater. Do not apply repellents
directly to children. Apply to your own hands and then put it on the
child.
- Do not apply near eyes, nose or mouth and use sparingly around ears. Do not apply to the hands of small children.
- After returning indoors, wash treated skin with soap and water.
How should a tick be removed?
Grasp the mouthparts with tweezers as close as possible to the
attachment (skin) site. Be careful not to squeeze, crush or puncture the
body of the tick, which may contain infectious fluids. After removing
the tick, thoroughly disinfect the bite site and wash hands. See or call
a doctor if there are concerns about incomplete tick removal. Do not
attempt to remove ticks by using petroleum jelly, lit cigarettes or
other home remedies because these may actually increase the chance of
contracting a tick-borne disease.