Ch19 presentation bites_and_stings
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Transcript of Ch19 presentation bites_and_stings
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Chapter 19Bites and Stings
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Animal Bites
• Two concerns result from an animal bite:− Immediate tissue damage− Later infection from microorganisms
• Dogs are responsible for the majority of all animal bite injuries.
© E.M. Singletary, M.D. Used with permission.
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Animal Bites
• Children and older people are especially prone to animal bites.
• Damage mostly occurs on the hands, arms, legs, and face.
• Wild animal attacks occur most often in rural or wilderness locations.
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Rabies
• One of the most ancient and feared of diseases
Data from Centers for Disease Control and Prevention.
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Human Bites
• Human bites can cause severe injury.− Most are acts of violence.− Most common injury location is the hand.
© American Academy of Orthopaedic Surgeons.
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Snake Bites
• About 100,000 people die of snake bites each year.
• In the United States, 7,000 to 8,000 are bitten by venomous snakes annually.
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Snake Bites
• Four species of venomous snakes in the United States− Rattlesnakes− Copperheads− Water moccasins− Coral snakes
© Jones & Bartlett Learning.
© Jones & Bartlett Learning.
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Snake Bites
• At least one species of venomous snake is found in every state except Alaska, Hawaii, and Maine.
© Jones & Bartlett Learning.
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Legitimate Snake Bites
• Bitten before the encounter with a snake was recognized
• Bitten while trying to move away• Most often involve the lower extremities• Are accidental
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Illegitimate Snake Bites
• Person recognized the encounter with a snake
• Did not attempt to move away• Most often occur on the upper extremities• Most often occur when the person tries to
kill, capture, play with, or move a snake
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Pit Viper Bites: What to Look For
• Severe burning pain• Two small puncture
wounds• Swelling• Discoloration• Blood-filled blisters• Nausea, vomiting,
sweating, weakness© American Academy of Orthopaedic Surgeons.
© American Academy of Orthopaedic Surgeons.
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Pit Viper Bites: What to Do
• Call 9-1-1.• When possible, carry the person.• Do not apply a pressure bandage.
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Coral Snake Bites
• America’s most venomous snake• Rarely bite people• Venom is a neurotoxin.• Symptoms begin 1 to 5 hours after the bite
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Coral Snake Bites: What to Look For
• Several hours may pass before the onset of:− Minimal pain− Sagging or drooping upper eyelids− Weakness− Pricking, tingling of skin− Double vision− Difficulty swallowing− Sweating− Abnormal flow of saliva
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Coral Snake Bites: What to Do
• Call 9-1-1.• Apply a wide elastic bandage.• Stabilize the bitten arm or leg and keep it
below heart level.• Do not cut skin or use suction.
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Other Reptile Bites
• Venomous lizards include:− Gila monster− Mexican bearded lizard
• Venomous lizards may hang on chew venom into person’s skin.
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Other Reptile Bites: What to Look For
• Puncture wounds• Swelling and pain• Sweating• Vomiting• Increased heart rate• Shortness of breath
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Other Reptile Bites: What to Do
• Give pain medication.• Call 9-1-1.• Treat the bite the same as you would for a
pit viper bite.
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Insect Stings
• Honeybees• Bumblebees• Yellow jackets• Hornets• Wasps• Fire ants
© Borut Gorenjak/Shutterstock. © Dwight Lyman/Shutterstock.
© pixelman/Shutterstock.
© Heintje Joseph T. Lee/Shutterstock.
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Insect Stings: Wasps, Hornets, and Fire Ants
• Stingers do not embed in person.
• Can sting multiple times
• Most do not die after stinging.
Courtesy of Scott Bauer/USDA
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Reactions to Insect Stings
• Most stings cause only self-limited, local inflammatory reactions.− Pain− Itching− Redness− Swelling
Courtesy of Daniel Wojcik/USDA.
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Spider and Insect Bites
• Most spiders are venomous.• About 60 species in North America
are capable of biting humans.
© Jones & Bartlett Learning.
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Black Widow Spiders
• Also known as brown widow spiders and red-legged spiders
• Only three of the five species are actually black.
© photobar/Shutterstock.
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Tarantulas
• Bite only when provoked or roughly handled
• When upset, scratches abdomen and flicks hairs onto a person
© Nick Simon/Shutterstock.
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Scorpion Stings
• Look like miniature lobsters
• Stings to adults are usually not life threatening.
• Stings to small children are often dangerous.
• http://www.wikihow.com/Kill-a-Scorpion
© David Desoer/Shutterstock.
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Embedded Ticks: What to Look For
• No initial pain• Red area around tick• Rash, fever, and chills• Varies from small
bump to extensive swelling and ulcer
Courtesy of James Gathany/CDC.
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Marine Animal Injuries
• Most marine animals bite or sting in defense rather than attack.
© AbleStock.
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Marine Animals That Sting
• Jellyfish and Portuguese man-of-wars have long tentacles equipped with nematocysts.
Courtesy of NOAA. © Nir Levy/Shutterstock.
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Stingrays
• The tail barb of a stingray easily penetrates human skin and can do significant damage.
© Roger Dale Calger/Shutterstock.