Poisonous animal

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  1. 1. Redback Spider 12/11/2015 Shuji Ishitobi 1 Professor Christopher YUKNA
  2. 2. Contents2 What is Redback Spider Habitats Their figure Their lifecycle Venom Symptom Treatment and care Conclusion
  3. 3. What is Redback Spider?3 Adult female Adult male The redback spider (Latrodectus hasseltii), also known as the jockey spider, is a species of poisonous spider indigenous to Australia. The redback is one of the few spider species that can be seriously harmful to humans, and its preferred habitat has led it to being responsible for the large majority of serious spider bite in Australia.
  4. 4. Habitats4 Australia Distribution Areas Japan
  5. 5. Red pattern on the back Color and shape5 Red pattern also stomach Fang (0.7mm) Even if bitten from the top of the clothes, it does not reach the skin.
  6. 6. Size6 Male Female Male : 3~5mm Female : 10~15mm Female only has a poison, there is no poison in the male.
  7. 7. Where does Redback Spider Live?7 Sunny and warm place Where there is plenty of food, such as insects or small animals Where there is a suitable gap to put the nest The back of groove Fence Under the planter
  8. 8. What does Redback Spider eat?8 They can survive for 100 days without any food.
  9. 9. Lifecycle of Redback Spider9 JuvenileAdult Eggs Internal sac of one egg : 100~200 Egg sac Male : 58~75 days Female : 75~104 days They work in June-September
  10. 10. Their venom10 Venom is produced by glands in the cephalothorax, and expelled venom travels through paired ducts from the cephalothorax, exiting through the tip of the spider's hollow fangs. Venom gland Fang Venom protein Muscular layerFang and venom gland of redback spider Microstructure of venom gland of redback spider
  11. 11. Component of the venom11 Name : -latrotoxin (neurotoxin) King Cobra : 1.75mg/kg Redback Spider : 0.59mg/kg Features of -latrotoxin The only toxic to vertebrate Toxin which is effective in the presynaptic membrane Toxic effect of promoting the depolarization of the central nervous system of vertebrates TOXICITY (Comparison of LD50) Their poison is stronger than snakes it.
  12. 12. Actions of -latrotoxin12 1. -latrotoxin is allowed to flow to force the Ca ion by acting from outside the neuron to calcium channels of axon terminals. 2. Neurotransmitter is released all and we provoke such seizures abnormally excited the muscle fibers or neurons 3. Information transmission function of the nervous system is paralyzed.
  13. 13. Symptom13 Immediately after being bitten When redback spider bites, almost no pain topical immediately after being bitten and only feel a slight pain at a site bitten even. In some cases, stab mouth is found one or two. 5~60 minutes after being bitten Local symptoms appear, pain will increase gradually. 60 minutes~ after being bitten Pain bitten over time spread to the entire limb. Local sweating also occur, warmth, itching also often associated with. However, the greatest feature of the local symptoms is pain. There are example that people died by anaphylactic shock.
  14. 14. If we are bitten14 We dont die by their poison because injection amount of their poison is a little. If the treatment is delayed, we cause muscle paralysis or skin rot. However
  15. 15. Bite treatment and care15 If we are bitten by redback spider, we have to wash the area of the bite with soap and water. Even if there is bleeding, it is not necessary to the tourniquet and bandage. Chilled on ice the wound, to go to the hospital.
  16. 16. How to remove16 If you found a redback spider, you must not touch it with bare hands. Spraying Stomping Burning
  17. 17. Conclusion17 The adult female redback spider has a round body about 1 cm long, with long, slender legs. The body is a deep black (occasionally brownish), with a red (sometimes orange) longitudinal stripe on the upper abdomen. The poison that they have is very strong to the vertebrate. However, if you do not do anything for them, they will not bite. If we are bitten by them, appropriate care is necessary.
  18. 18. Thank you!! 18