Raccoon Roundworm

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Information about Raccoon Roundworm

Published on April 9, 2008

Author: mbc

Source: slideshare.net

Description

A presentation I gave to my Animal Science 500 class. I chose to speak on raccoon roundworm because, having worked in wildlife rehabilitation, I know that it poses quite a serious concern - as my presentation reveals.

Raccoon Roundworm Meghann Cant March 17, 2008

Overview What is it? What does it do? Why is it a problem? What can be done about it? Michigan Department of Natural Resources

What is it?

What does it do?

Why is it a problem?

What can be done about it?

1. What is it? Baylisascaris procyonis Nematode Parasite Family Ascarididae Distinct species Raccoons are its natural host

Baylisascaris procyonis

Nematode

Parasite

Family Ascarididae

Distinct species

Raccoons are its natural host

Life Cycle The Gable

Eggs Thick, sticky shell Single-celled embryo 63 to 88 μ m by 50 to 70 μ m Centers for Disease Control

Thick, sticky shell

Single-celled embryo

63 to 88 μ m by 50 to 70 μ m

Adults Females: 20 to 22 cm long Males: 9 to 11 cm long Reproduce sexually 115,000 to 179,000 eggs/worm/day Centers for Disease Control

Females: 20 to 22 cm long

Males: 9 to 11 cm long

Reproduce sexually

115,000 to 179,000 eggs/worm/day

2. What does it do? Raccoons Usually subclinical Heavy: 43 to 52 worms Juveniles: 48 to 62 worms Adults: 12 to 22 worms Scott Paulson

Raccoons

Usually subclinical

Heavy: 43 to 52 worms

Juveniles: 48 to 62 worms

Adults: 12 to 22 worms

Prevalence (Gavin et al . 2005)

3. Why is it a problem? Zoonotic Average: 20,000 to 26,000 eggs shed/gram of feces Highest on record: > 250,000 eggs shed/gram of feces It only takes a few to cause disease!

Zoonotic

Average: 20,000 to 26,000 eggs shed/gram of feces

Highest on record: > 250,000 eggs shed/gram of feces

It only takes a few to cause disease!

Accidental Ingestion Birds and rodents Seeds in feces Children Contaminated soil or water Kevin Kazacos

Birds and rodents

Seeds in feces

Children

Contaminated soil or water

Disease Potential Urban areas Latrines University of South Carolina

Urban areas

Latrines

Latrines (Roussere et al . 2003)

Disease Dead-end host Visceral larval migrans Liver, lungs, eyes, brain, spinal cord Ocular larval migrans Eyes Neural larval migrans Brain and spinal cord

Dead-end host

Visceral larval migrans

Liver, lungs, eyes, brain, spinal cord

Ocular larval migrans

Eyes

Neural larval migrans

Brain and spinal cord

Symptoms Tiredness Nausea Loss of muscle control Blindness Paralysis Coma Death

Tiredness

Nausea

Loss of muscle control

Blindness

Paralysis

Coma

Death

Disease Incidence (Gavin et al . 2005)

4. What can be done about it? Eggs remain viable in the environment for years Disinfectants do not work High heat is effective, but often impractical Critter Care Wildlife Society

Eggs remain viable in the environment for years

Disinfectants do not work

High heat is effective, but often impractical

Treatment Humans Albendazole and dexamethasone Start immediately Raccoons Pyrantel pamoate Mebendazole Fenbendazole Research Animal Diagnostic Laboratory

Humans

Albendazole and dexamethasone

Start immediately

Raccoons

Pyrantel pamoate

Mebendazole

Fenbendazole

Prevention Do not feed raccoons Use gloves, boots, and masks Follow quarantine procedures Dispose of latrines properly Meghann Cant

Do not feed raccoons

Use gloves, boots, and masks

Follow quarantine procedures

Dispose of latrines properly

Any questions? Critter Care Wildlife Society

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