Bites

 

spider_attack.jpg

felix schill www.schillnet.org  Can you tell that this huntsmen spider is afraid of the camera holder?

 

Disclaimer: This page is intended only as supplemental information and should not take the place of professional medical advice.

 

 

  

    Black Widows (Lactrodectus sp.)

    Venom type:  Neurotoxin (affecting the nerve system)

    Symptoms:  varies depending on the person bitten and how much venom has been injected

  • abdomen will become painfully stiff
  • chest will feel tight
  • muscle contractions (alternate tension and relaxation) in legs
  •     increase blood pressure
  •     raise in body temperature and/or white blood cell count
  •     often profuse perspiration, nausea, and swelling in bite area

    Deadly:  not usually

  • death can occur between 14 and 32 hours after being bitten
  • convulsions followed by inability to breath

    Medical Treatment:  Get to a medical facility as soon as possible.  May apply antiseptic to

            bite site.  Bring in the spider for verification!!!

 

   

 

    Brown Recluse or "violin spider" (Loxsoceles reclusa, L. deserta, L. arizonica, L. laeta)

    Venom type: Necrosis (local tissue death) and maybe some neurotoxic effects

    Symptoms:  varies depending on the person bitten and how much venom has been

              

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injected; bite usually painless, but symptoms may appear 6 to 8 hours later.

  • 6 to 8 hours
  •         abnormal redness, tenderness, and/or blister formation in bite area
  • 12 to 24 hours                                                                                                                                                  
  •         a feeling of being ill, chills, fever, and/or nausea
  • 2 to 7 days
  •         skin loss and tissue death near bite
  •         possible liver and/or kidney damage from ruptured blood cells, which can cause death

    Deadly:  not usually

    Medical Treatment:  Get to a medical facility as soon as possible if you think you have been bitten by a brown recluse. 

                Bring in the spider for verification!!!

 

 

 

    Hobo Spider or Aggressive House Spider (Tegenaria agrestis)

    Venom type: Necrosis (local tissue death) and maybe some neurotoxic effects

    Symptoms:  varies depending on the person bitten and how much venom has been

                   injected; bite usually painless, but symptoms may appear 6 to 8 hours later.

  •         abnormal redness, tenderness, and/or blister formation in bite area
  •         possible feeling of being ill, chills, fever, and/or nausea
  •         skin loss and tissue death near bite

    Deadly:  not usually

   

     Medical Treatment:  Get to a medical facility as soon as possible if you think you have been bitten by a hobo spider. 

                Bring in the spider for verification!!! 

             www.srv.net/ ~dkv/hobospider/  This seems to be an excellent site for hobo spider information.

       * there is some debate to the toxicity of the hobo spider.   The necrosis may be from something other than the actual venom of the hobo spider.  This site will be updated when tests confirm where the necrosis comes from.

        

           male                female

 

 

                 

           

 

    Yellow Sac Spider (Chiracanthium sp.)

    Venom type: Possible necrosis (local tissue death)

    Symptoms:  varies depending on the person bitten and how much venom has been injected.

  •         abnormal redness, itchiness, and/or swelling in bite site

    insects.tamu.edu

    Medical Treatment:  Get to a medical facility as soon as possible if you are not sure

what you have been bitten by.  If it is a yellow sac spider then you probably don't need to go,

but it is always better to be sure.

                Bring in the spider for verification!!!

 

  

    Some (Phiddippus sp.)  Red-Backed Jumping Spider

    Symptoms:  varies depending on the person bitten and how much venom has been injected.

  • Reddening and pain in bite site lasting for a few days

Medical Treatment:  Go to a medical facility if you want to, or if symptoms persist or get worse.

                Bring in the spider for verification!!!

 

                                                             http://www.perezmedia.net/droppings/archives/2003_09.html

 

 

Great Sources for Bites

Entomology - Bites and Stings of medically important venomous arthropods

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