to xo car a presentation

7/29/2019 To Xo Car a Presentation

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Order: Ascaridida

Family: Toxocarida

Genus: Toxocara

Species: T. canis

Geography: Worldwide


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Both males and females have three prominent lips Each lip has a dentigerous (teeth bearing) ridge

Eggs are 75-90 micrometers embryonated when laid

Have pits Very resistant to various weather and chemical conditions

Males: 4-6 cm long

Females: 6.5 cm long can be as long as 15 cm

The vulva is about one-third the body length

The uteri can contain up to 27 million eggs at a time.


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Toxocara egg

Larvated eggs


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Larvae


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Adults


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Humans become infected by ingesting infectiveeggs, often due to close contact with puppies orfrom egg infected with soil

Transuterine transmission

puppy can get from mother during

pregnancy or from mothers milk.


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Definitive host: Dog or other canid

Paratenic hosts: mice, rabbits, andmonkeys

Accidental host: Humans


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Toxocara cati

Very similar to Toxocara canis

One of the most common feline helminths


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Toxocara canis causes toxocariasis: azoonotic infection caused by the

parasitic roundworms found in theintestine of dogs.


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1) Ocular larva migrans (OLM):

Toxocara infections can cause an eye disease which can cause blindness.

OLM occurs when a microscopic worm enters the eye

Each year more than 700 people infected with Toxocara experiencepermanent partial loss of vision.

OLM occurs when larvae enter the eye. This results in a loss of vision or severeocular inflammation

http://www.youtube.com/watch?v=-8K9R2M-LfE
http://www.youtube.com/watch?v=-8K9R2M-LfEhttp://www.youtube.com/watch?v=-8K9R2M-LfEhttp://www.youtube.com/watch?v=-8K9R2M-LfEhttp://www.youtube.com/watch?v=-8K9R2M-LfEhttp://www.youtube.com/watch?v=-8K9R2M-LfEhttp://www.youtube.com/watch?v=-8K9R2M-LfE


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2) Visceral larva migrans (VLM):

Repeated Toxocara infections can cause a disease that causes

swelling of the bodys organs or central nervous system.

When the larval parasite migrates through the human body it isknown as larval migrans.

In the UK alone there are over300 cases of toxocariasis diagnosedeach year.


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Symptoms : VLM: include abdominal pain, fever, coughing,

wheezing and asthma

OLM: include ophthalmologic lesions

Often found in children aged between 2 & 7 Can also be asymptomatic


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Is usually made by serology or the finding

of larvae in biopsy or autopsy specimens.

ELISA

positive in 78% of those with visceral larvamigrans

positive in 45% of those with ocular toxocariasi


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Cross-section of Toxocara Larvae in livertissue


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Prednisone

Albendazole or Mebendazole


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Dont allow dogs to lick your face

Wash hands after playing with pets

Avoid infected areas

De-worm dogs


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Small children are susceptible

Prelevant because every puppy is

assumed to have this helminth


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http://course1.winona.edu/kbates/ascarids.htm

http://www.soton.ac.uk/~ceb/Students/Toxocara.htm

http://www.dpd.cdc.gov/dpdx/html/Toxocariasis.htm

http://animaldiversity.ummz.umich.edu/site/accounts/information/Toxocara_canis.html

http://www.merckvetmanual.com/mvm/index.jsp?cfil

e=htm/bc/23505.htm

http://www.scielo.cl/scielo.php?pid=S0717-77122008000100012&script=sci_arttext
http://course1.winona.edu/kbates/ascarids.htmhttp://www.soton.ac.uk/~ceb/Students/Toxocara.htmhttp://www.dpd.cdc.gov/dpdx/html/Toxocariasis.htmhttp://animaldiversity.ummz.umich.edu/site/accounts/information/Toxocara_canis.htmlhttp://animaldiversity.ummz.umich.edu/site/accounts/information/Toxocara_canis.htmlhttp://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/23505.htmhttp://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/23505.htmhttp://www.scielo.cl/scielo.php?pid=S0717-77122008000100012&script=sci_arttexthttp://www.scielo.cl/scielo.php?pid=S0717-77122008000100012&script=sci_arttexthttp://www.scielo.cl/scielo.php?pid=S0717-77122008000100012&script=sci_arttexthttp://www.scielo.cl/scielo.php?pid=S0717-77122008000100012&script=sci_arttexthttp://www.scielo.cl/scielo.php?pid=S0717-77122008000100012&script=sci_arttexthttp://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/23505.htmhttp://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/23505.htmhttp://animaldiversity.ummz.umich.edu/site/accounts/information/Toxocara_canis.htmlhttp://animaldiversity.ummz.umich.edu/site/accounts/information/Toxocara_canis.htmlhttp://www.dpd.cdc.gov/dpdx/html/Toxocariasis.htmhttp://www.soton.ac.uk/~ceb/Students/Toxocara.htmhttp://course1.winona.edu/kbates/ascarids.htm

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