Raccoon Parasite Warning

Rabbits Online Forum

Help Support Rabbits Online Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Pipp

Well-Known Member
Joined
Mar 1, 2005
Messages
12,878
Reaction score
58
Location
Vancouver, British Columbia, Canada
I had this in my Pipp molar spurs thread but seeing as its very off-topic, I thought I'd give it its own thread.

The discussion was on the perils of feeding rabbits wild grass and other vegetation. Raccoon parasites are particularly harmful to rabbits.

A saving grace is that the raccoons are creatures of habit much like the bunnies, so they have very specific 'toilet' areas.

Here's an article on recognition and clean-up.

http://www.sbcphd.org/documents/alerts/clean_raccoon_latrine.pdf


What is a raccoon latrine?

Raccoons establish community latrines—sites where they repeatedly deposit fresh feces (droppings or scat) on top of old feces in a particular area in the environment.

What do raccoon latrines look like?


Raccoon latrines consist of piles of raccoon feces of different ages. Fresh raccoon feces are tubular with blunt ends, and about the same diameter as a dime or nickel. Generally, fresh raccoon feces are dark, but it depends on what the animal was eating. Seeds or shells may be seen in the feces. As feces age, they weather and decompose. Old feces may look like dried leaves or debris.

Where are raccoon latrines found?

Raccoons prefer sites that are flat and raised off the ground, but they also use the base of trees, and occasionally, open areas. Common sites for raccoon latrines are roofs, decks, unsealed attics, haylofts, forks of trees, fence lines, woodpiles, fallen logs, and large rocks.

Why should I clean up a raccoon latrine?

A raccoon latrine may contain roundworm eggs that can be hazardous to human health. The adult stage of the raccoon roundworm (Baylisascaris procyonis) lives in the raccoon’s intestine and produces microscopic eggs that are shed in the raccoon’s feces. One raccoon roundworm can produce more than 100,000 eggs a day. A raccoon can pass millions of eggs in its feces everyday, depending on how many worms are in its intestines. Once deposited in the environment, the eggs develop into the infectious form in 2-4 weeks, and can survive in the soil for several years.

If the infectious form of the eggs is inadvertently swallowed by humans, other mammals, or birds, larvae (immature stage of worms) hatch out of the eggs and move into the organs of the body. The larvae travel throughout the body and, on rare occasions, may cause serious eye disease, spinal cord or brain damage, or death. Discouraging raccoons from an area and cleaning up raccoon latrines reduces the chance that people or other animals will get sick from raccoon round worms.

Is it dangerous to clean up a raccoon latrine?

Serious roundworm disease is rare (11 cases reported in the United States to date), but because the disease can be severe, special precautions should be taken when cleaning up raccoon latrines. If you do not ingest developed eggs, you cannot get the disease. Taking special precautions will help reduce the chance that you will accidentally swallow eggs or contaminate other surfaces or objects. Be sure to avoid spreading eggs further when you clean up a latrine, and keep pets and children away from the latrine area until the cleanup is finished.

How do I protect myself while cleaning up a raccoon latrine?

¨ Wear disposable gloves—rubber, plastic, or latex.
¨ Wear disposable plastic booties, or rubber boots that can be scrubbed and left outside.
¨ If working in a confined area, such as an attic or crawl space, wear a N95-rated particle mask (home renovation or safety supply stores carry them) to prevent accidental ingestion of eggs or inhalation of fungal spores or dust.
¨ Thoroughly launder your clothes with hot water and detergent after cleaning up the latrine.
¨ Read the instructions below and follow the instructions carefully

How do I clean up outdoor raccoon latrines?

¨ Avoid stirring up dust and debris. You can lightly mist the latrine area with a little water from a spray bottle to reduce the amount of dust.
¨ Use a shovel or disposable rigid scoop to gently lift feces and any other contaminated material and place it into a heavy-duty plastic garbage bag.
¨ Close the plastic bag tightly with a “twist-tie” or tape, and place it into another garbage bag (“double-bagging”), discard it in your garbage collection can, and make sure that raccoons cannot get into the can.
¨ Disinfect hard, smooth surfaces (including shovel blades) with boiling water.

If the latrine is on the ground and the soil is heavily contaminated with feces, you may want to remove and discard the top 2-4” of soil and replace it. Large quantities of removed soil are best discarded in landfill disposal sites.

Should I flame the latrine site with a propane torch?

Most chemicals do not kill roundworm eggs and are not suitable for outdoor use. Extreme heat will kill eggs instantly. Flaming with a propane torch is effective, but could cause a fire, burn injury, or surface damage. Before flaming any latrine site, call your local fire department for details on local regulations and safety practices. Concrete pads, bricks, and metal shovels or garden implements can be flamed without damage. Do not attempt to flame surfaces that can melt or catch fire. Break up and turn over contaminated soil several times, flaming each time.

How do I clean up indoor raccoon latrines?

To clean up an indoor latrine:

¨ Wear the protective clothing recommended for cleaning up outdoor latrines.
¨ Wear an N95-rated particle mask if cleaning up a latrine in a confined space such as an attic or crawl space.
¨ Avoid stirring up dust and debris – you can lightly mist the latrine area with a little water from a spray bottle to reduce the amount of dust.
¨ Remove feces as directed in cleaning up outdoor latrines.
¨ If you cannot use heat (flame, boiling water), use hot soapy water and a damp (not wet) sponge to wipe up residual fecal material. Rinse often.
¨ Flush dirty rinse water down the toilet.
¨ Place the sponge in a plastic bag and put the plastic bag in the garbage.
¨ Disinfect the wash and rinse water containers with boiling water.

What do I do if I get raccoon feces on my skin or clothes?


¨ Wash skin with plain soap and warm water—clean thoroughly under your nails with a brush.
¨ Wash clothes separately in very hot, soapy water; bleach is not required but can be used if desired.

Cleaning up latrines helps deter raccoons, but removal of attractants (such as pet food, accessible garbage cans, shelter under decks, etc.) and exclusion methods are necessary to prevent raccoons from returning. If you have questions or concerns about excluding raccoons, consult your local animal control agency or professional pest management company.

 
Raccoon roundworm
One of my greatest fears. ...
I have talked to animal control officers at the shelter about it and also read some posts awhile back on EB
Someone on EB did a thesis on raccoon roundworm .....placing eggs in a combination of bleach and some other strong cleaning agent like lysol; ................ AND THE EGGS HATCHED
I guess a blow torch is the only way to clean the bottom of a cage.

It has been studied by the government asa biological weapon
all kinds of storries and yet not a lot of people die of it which is good but
that is one of many reasons my rabbits do not go outside

raccoons are everywhere

I used to live in downtown Chicago ,heart of the city, and there were raccoons in the park along the lakefront. (coyotes too)

thank God they do not poop everywhere (like rabbits)
 
I guess I should print some info about the roundworm in rabbits.

Here's the best article in my database I think...


SMALL MAMMAL HEALTH SERIES
By Susan Brown, DVM

Hind Limb Weakness in the Rabbit
http://www.veterinarypartner.com/Content.plx?P=A&A=490&S=5


Here's an excerpt:

Baylisascaris procyonis

Cause - Baylisascaris procyonis is the scientific name for an intestinal roundworm found in raccoons in North America, Japan and Germany. It is estimated that some populations of raccoons have a 68 to 82% infection rate with this parasite. Skunks carry a similar species, Baylisascaris columnaris that can also affect other species of animals. All the things said about the raccoon roundworm will also apply to the skunk roundworm.

B. procyonis
does not adversely affect the raccoons that carry it. The eggs of the parasite are passed by the millions in raccoon feces where they can stay in the environment for years withstanding both heat and cold. When a species of animal other than a raccoon swallows an egg the microscopic larva hatches out in the intestine and then burrows through the wall of the intestine and begins migrating through the body trying to find a home. The body in turn tries to kill the larva and it moves rapidly to escape attack. The larvae seem to have a preference for lodging in the liver, eyes, spinal cord or brain. Occasionally they can be found in other organs.

When a larva tries to make a home it causes a great deal of damage as the body tries to either kill it or wall it off from other tissues. Eventually the larva dies and is reabsorbed by the body. In very small species such as mice only one or two larvae in the brain can be fatal. If the larva does not cause significant damage in vital organs then the victim will show no signs of disease. Species other than the raccoon that are affected with this parasite CANNOT pass it on to anyone else. This is the end of the line for the larva and it never becomes a mature adult capable of producing eggs.

There are over 50 species of animals that are affected by this parasite including dogs, squirrels, chinchillas, guinea pigs, mice, rats, birds and humans. This parasite is responsible for disease or death in humans, usually children, every year in this country.

Signs -
The signs of disease caused by B. procyonis are similar in all species affected and depend on the amount of damage and the organ(s) affected. Signs can include any combination of the following: sudden lethargy, loss of balance, abdominal pain, paralysis of one or both sides of the body, loss of muscle coordination, head tilt, blindness, coma and death. In humans the signs appear approximately 2 to 4 weeks after exposure.

Diagnosis -
In humans there are more options open for diagnosis of this disease. There is a blood test to find out if the person has antibodies to the parasite. This is currently not readily available for rabbits. In humans there is a change in the blood count resulting in a high level of white blood cells called eosinophils. These blood cell also occurs in high numbers in the cerebrospinal fluid (the fluid around the brain and spinal cord). Unfortunately rabbits do not respond consistently in the same way. Finally humans can more easily have dye studies done of the brain or other tissues through the use of CAT scans or MRI's, something that can be cost prohibitive or simply not available for the pet rabbit.

Diagnosis in the rabbit is most often based on the rule-out of other diseases such as infectious, toxic, traumatic or E. cuniculi and the possibility of exposure to material contaminated by raccoon feces. Unfortunately the diagnosis is often not made until after death when the brain and other organs can be examined microscopically for the presence of B. procyonis larvae.

Treatment -
Currently there is no effective treatment for this disease. The problem is that there is a great deal of damage already present by the time the rabbit shows signs of illness. Most antiparasitic drugs cannot penetrate the tissue in high enough doses once the parasite is walled off. Some sources suggest that using an antiparasitic drug anyway might slow down or kill the larvae that are still migrating, but this has not been proven. The current suggestion is to use high levels of corticosteroids immediately upon observation of signs to try to suppress the inflammation that is taking place in the affected tissues. In humans this seems to help alleviate some of the signs as least temporarily. Corticoteroids are not a cure nor will they reverse all the damage, but they may minimize the trauma to the tissue. Corticosteroids have to used with caution in rabbits because they may worsen any bacterial disease present and they may cause alterations in the flora of the cecum. An injection of a short-acting corticosteroid might be helpful initially and then continued based on the rabbit's clinical response.

Prevention -
This is really the best option for controlling this disease. Since this disease is just as dangerous to humans and other pets as it is to rabbits then these precautions are doubly important. Here are some recommendations from Kevin Kazacos, DVM, PhD at Purdue University in W. Lafayette, Indiana. Dr. Kazacos is currently studying this parasite in pets and wild animals and has written a number of excellent articles on this disease.
  • Do not keep raccoons as pets. Not only are they not suitable for pets because they are wild animals, but they may pose a serious health risk.
  • Learn to recognize raccoon latrine areas and either stay away from them or clean them up if necessary. Favorite spots are at the base of trees, in the forks of trees, on fallen logs, large rocks, woodpiles, decks, in attics, garages, chimneys, barns and outbuildings. In addition raccoons like to nest in haylofts and may contaminate hay or straw that is used for bedding or food. Purchase hay or straw from a clean source and dispose of any bales that show evidence of fecal contamination. Do not store the hay you buy in areas that raccoons have access to. Be cautious using and handling fallen timber for firewood.
  • Monitor children closely in potentially contaminated areas. Children are the most easily affected because they frequently put unwashed hands in their mouths. Do not house rabbits on the ground in areas inhabited by raccoons.
It may be possible to have soil samples tested in your yard to see if the area is contaminated. Cleaning up a latrine area can be a challenge. The eggs of the Baylisascaris species are extremely resistant to environmental conditions. The eggs can survive for YEARS. They are resistant to all common disinfectants including bleach. The best way to kill the eggs is through flaming the area (including soil) or burning affected material such as straw or wood cages. Alternately, boiling water can be poured over small areas at a time. In heavily contaminated areas it may be necessary to remove and bury the soil in a deep spot elsewhere. When cleaning up any latrine area, proper protection is a must which should include a dusk mask over the nose and mouth, disposable clothing, disposable gloves and heavy rubber boots that can be cleaned with boiling water.

Prevent further contamination of the area by blocking off access routes for raccoons, not feeding raccoons around the property and using repellents such as mothballs around potential access areas.

 
That is very scary and I'm glad you've posted it for us to see. So should we not let your bunnies eat ground vegetation at all if we know raccoons are in the area (since the eggs can persist for so long)? I don't think my landlord would take kindly to me torching the lawn (even if I did replant it) to kill the eggs.
 
Back
Top