Link

Scorpions to Snakes; Bites and Stings That Hurt the Most

New Scorpion Anti-Venom Shows Promise; Other Stings and Bites Show Nature’s Painful Side

By LAUREN CAHOON
ABC News Medical Unit

May 14, 2009—

 

Certain members of the animal kingdom have a talent for torture, as those of us who have been unlucky enough to experience it can attest.

The perpetrators of burning bites and painful stings are often minuscule. Take, for example, the bark scorpion. Usually measuring in at one to three inches in length, it is a critter that still packs a venomous sting. In children, the poison from a single sting can lead to irregular eye movements, involuntary thrashing of limbs, breathing difficulties and other symptoms.

Its sting made headlines today with the release of a new study in the New England Journal of Medicine suggesting that an experimental anti-venom medication used in Mexico but not approved for use in the United States appears effective in helping children recover quickly.

Researchers at the University of Arizona looked at a total of 15 young children in the small study, all of whom were receiving treatment at a Tucson pediatric intensive-care unit after having been stung by a bark scorpion, which is common to the southwest United States. What they found was that the eight children who received the drug had their symptoms disappear within two hours. The seven children who did not receive the drug, however, suffered for more than four hours and needed sedation and hospitalization before recovering fully.

“This study told us that the dangerous effects of bark scorpion venom can be reversed quickly with the right anti-venom,” Dr. Leslie Boyer, principal investigator of the study and director of the Venom Immunochemistry, Pharmacology and Emergency Response Institute at The University of Arizona College of Medicine, said in a news release issued by the university. “One-hundred percent of the children who received it got better very quickly, meaning that using this anti-venom in the emergency room will make intensive care treatment unnecessary for most patients.”

Of course, not all bites and stings can be ameliorated with a well-timed dose of anti-venom, and some are even deadly. On the following pages are 10 more of the most excruciating stings and bites nature has to offer. Some are potentially fatal, some are not. All are absolutely worth avoiding.

 

Bullet Ant

These inch-long insects are named after their sting; the pain is likened to being shot. Most scientists claim the creature has the most excruciating sting of all insects.

“I have had some of the most painful experiences I’ve ever had from bullet ant stings,” said Randy Morgan, curator of invertebrates, reptiles and amphibians at the Cincinnati Zoo. “For two or three hours, it felt like people had just hauled off and whacked me with a baseball bat. It’s a deep, aching pain.”

The bullet ant sting scores highest on the Schmidt Sting Pain Index, a rating created by entomologist Justin Schmidt, director of the Southwestern Biological Institute, which compares the ouch factors of different insects.

How does he know how much these insects’ stings hurt? He’s willingly endured each of them himself.

Schmidt’s rating gives a poetic description of the bullet ant’s sting: “Pure, intense, brilliant pain. Like fire-walking over flaming charcoal with a three-inch rusty nail in your heel.”

An indigenous tribe in the South America (the bullet ant’s home territory) requires their young men to pass a harrowing trial with bullet ants  the boys must wear special mitts that have been lined with hundreds of the angry insects. Not only must the youths endure the stinging treatment for 10 minutes at a time, they must repeat the process 20 times over again.

Luckily for them, as painful as the sting is, it does no permanent damage.

 

Box Jellyfish

These diaphanous sea creatures are the bane of tropical beaches. Considered to be one of the more dangerous critters in the animal kingdom, their tentacles contain extremely powerful venom that can kill humans.

Along with the poison comes extraordinary, burning pain. The creature’s tentacles discharge tiny needles into the victim’s skin; each needle contains a cocktail of pain-inducing ingredients that make it “the most painful sting. There is no question about it,” according to Dr. Joseph Burnett, past chairman of dermatology at the University of Maryland School of Medicine. “The bullet ant is nothing compared to this.”

What makes the animal so painfully effective are the 10-foot-long, stinging tentacles. Unfortunate swimmers can become draped and entangled in these drifting strands, and the intense doses of venom can induce shock and eventual drowning.

While it may seem like nothing but an instrument of torture, “the box jelly didn’t develop its horrible toxic venom just to torture people at the beach,” said Don Boyer, curator of reptiles and amphibians at the San Diego Zoo. The jellyfish requires its powerful poison to catch and eat its preferred prey, shrimp. Since a struggling shrimp can easily damage the delicate creature, the jellies need to kill their meal as quickly as possible.

 

Rattlesnakes and Their Relations

If there’s a family of snakes you don’t want to anger, it would be the vipers.

While these snakes don’t always have the most deadly bites, they have the most painful ones.

Van Wallach of the Harvard Museum of Comparative Zoology has had several viper bites; the worst one, he said, “came from an African bush viper. It felt like somebody had a blowtorch and was burning you inside your arm. & It went on for three straight days before I had any relief.”

Kelly Zamudio, a biologist at Cornell University, described a similar sensation when she was bitten by another member of the viper family  the rattlesnake.

“It feels like burning, like you’re being branded, but the brand never lifts,” she said.

The key to the excruciating pain of the viper’s bite is its tissue-destroying venom, which dissolves cell walls and causes internal bleeding. As the venom works its way through the body, so does the pain.

Vipers’ tissue-eating venom isn’t designed to hurt humans, but rather, to get a jump on digesting their food. When the snake strikes a rodent, bird or another type of prey, the toxins work quickly to help breaking down the tissue and get the meal ready for eating.

 

Stingrays

Although these animals gained a bad rep after the tragic Steve Irwin incident, stingrays are not aggressive or (usually) lethal animals. However, they have a sting, and on the rare occasion they choose to use it, “it’s very excruciating,” said Edward DeMartini, a research biologist at the National Oceanic and Atmospheric Administration fisheries.

When these gentle animals are stepped on or threatened, they will strike out with a sharp, serrated barb  about the thickness of a golf pencil  located at the base of the tail.

“The physical wound can be pretty intense,” said Jon Hoech, director of husbandry operations at the Monterey Bay Aquarium. “It’s extremely painful, like getting punctured with an eight-penny nail. Also, it’s like a cat scratch, it can carry a lot of bacteria.”

On top of the sizeable puncture wound comes a dose of toxins that cause instantaneous pain.

Stingrays only use their venomous barbs as a defense, not for hunting or attacking. As many marine biologists, scuba divers and snorkelers know, the animals are the ocean’s pussycats.

“I work with rays on a regular basis,” said Hoech. “I swim with them, I feed them by hand, and they’re very benign.” Just be sure to look where you step.

 

Scorpions

There are thousands of scorpion species, all of them equipped with stings. Many species’ stings aren’t much worse than a bee or hornet; but a select few can be a serious source of suffering.

“There are scorpions in the Old World that have extremely painful stings,” said Don Boyer. “It gets worse and worse and worse.”

These types of scorpions  found in Africa and Asia  can be dangerous as well as painful. However, in the Southwestern United States, the Arizona Bark Scorpion doesn’t pose much of a threat to healthy adults. It just means extreme pain.

“If you’re an adult and you get the poison in your finger, it just stays, and fires your pain nerve,” said Dr. Leslie Boyer  no relation to Don Boyer. “It locks the nerve in the on position.”

Leslie Boyer, who is medical director of the Arizona Poison and Drug Information Center, said that the tiny sting will “send shooting sensations up your arm.” If you’re clumsy enough to tap or bump that finger on anything, the pain instantly amplifies.

“You just give it a tap and you’re screaming in pain,” said Leslie Boyer. “Just that one little spot hurts like heck, it radiates up to your arm pit with this throbbing pain  but there’s nothing to see.”

Boyer says that since her practice sees so many painful stings and bites, “I tend to give out morphine like it’s candy.”

 

Spitting Cobra

While this reptile has a poisonous bite, it doesn’t actually induce much pain. Sure, it stops you from breathing, but for the venom to really make you scream, it needs to get into your eyes.

Spitting cobras have perfected the art of defense by shooting venom into an attacker’s eyes, which creates a blinding, burning pain. Like many other pain-inducing animals, the reason for the agony is to keep attackers away, rather than to stage an offensive.

Van Wallach was unfortunate enough to get the spitting treatment from a cobra in the Philippines.

“It is excruciating,” he said. “The only way I could relieve it was to pour milk into my eye about every 15 minutes. I was blind for about four to six hours.”

The cobra’s venom contains a mix of nerve poisons, tissue-destroying chemicals and other nasty compounds designed to elicit severe stinging. In worst case scenarios, it can lead to permanent blindness.

Should you ever encounter a spitting cobra  which is unlikely as they are fairly rare  make sure to keep a good 10-foot distance away from it. Their venom can shoot about four to eight feet.

 

Tarantula Hawk Wasp

This colorful, solitary wasp uses its stinging power to paralyze large tarantulas as food for its young. While the insect is not aggressive and rarely stings humans  “you really have to force them to sting you,” said Leslie Boyer  the experience is fabled to be one of the top most painful stings out there.

According to sting expert Schmidt, the tarantula hawk rates just below the agonizing bullet ant.

“When that one when it hits you, it almost feels like you’ve been hit by a lightning bolt,” said Schmidt. “You’ll be screaming and writhing in agony. & It feels like every gland in your body is purged of all its hormones, you’ll feel absolutely drained from the experience.”

Unlike other animals on this Top 10 list, the tarantula hawk’s venom is not for defense, but for paralyzing its much larger prey, tarantulas. The mother wasp lays a single egg on the comatose spider, dooming it to a horrific death. The egg hatches into a hungry larva, which then literally eats the tarantula alive, using it as a food source as it grows.

 

Stonefish

In terms of a perfect combo of pain and lethality, the homely stonefish’s sting may take first prize.

The stonefish, found in the rocky, shallow waters of tropical oceans, has several extremely sharp spines along its back. Hapless waders can easily mistake the well-camouflaged fish for a rock or hunk of coral  and if they step on the animal, the spines will puncture the skin and inject a complex and deadly venom.

The pain from the sting is described as instant and intense. One victim described the experience on an online aquarium enthusiasts’ forum:

“I got spiked on the finger by a stonefish in Australia & never mind a bee sting. & Imagine having each knuckle, then the wrist, elbow and shoulder being hit in turn with a sledgehammer over the course of about an hour. Then about an hour later imagine taking a real kicking to both kidneys for about 45 minutes so that you couldn’t stand or straighten up. I was late 20s, pretty fit physically and this was the tiniest of nicks. Got sensation back in my finger after a few days but had recurrent kidney pains periodically for several years afterwards.”

Other stories describe sting victims wanting to have their stung limb amputated from their body.

Hoech of the Monterey Bay Aquarium has worked closely with the stonefish, and he agreed that the animal “is definitely at the top of the list” of the most pain-producing creatures.

 

Black Widow Spider

“I never want a bad black widow bite,” said Leslie Boyer, referring to the poisonous spider found all over the southern United States.

Although 95 percent of the spiders’ bites are trivial, if you’re unlucky enough to get nipped by a large, healthy black widow where your skin is thin, the experience can be excruciating.

Leslie Boyer described the time when a rural doctor called her up about an athletic 20-something man who had been bitten.

“The patient had looked at him and said ‘It hurts too much to breathe,’ and then he just stopped,” she said. “To be awake enough to say that, and then willingly stop breathing  that’s got to be intense pain.”

The black widow bite doesn’t hurt initially, as the fangs are small. But an hour and a half later, the venom, which contains a toxic ingredient that interacts with the body’s muscles, causes extreme cramping throughout the body.

“Imagine every muscle in a spasm at the same time, and they won’t relax for days,” said Leslie Boyer.

But people shouldn’t revile the black widow, she stressed. “I have them on my porch and in my house,” she said. “They never leave their webs, you always know where they are  they’re better than a bug zapper.”

 

Gila Monster

This slow-moving lizard from the Southwest United States packs a surprisingly painful bite.

Cecil Schwalbe, ecologist with the U.S. geological survey, was bit by a Gila monster while handling one in an outreach demonstration in front of 200 people. He lists it as the most painful bite in his experience.

“My finger was on fire, the wave of fire moved slowly up my body,” Schwalbe said. Within five minutes I turned pasty green and went into shock. & I had pain in my kidneys, blood in my urine. & All of my sphincters in my body were trying to relax. It was on my finger for two minutes and it bit me five times  every bite went right to the bone.”

The reasons for the pain are twofold. First, the Gila monster has very sharp teeth, each about a quarter of an inch long. When the animal bites, it chomps down hard  and doesn’t let go. Stories are told of bite victims rushing to the hospital with the lizard still attached.

Second, Gila monsters are equipped with specialized venom, full of compounds that break down collagen and vein membranes, a cocktail that is “built to cause inflammation, and just cause pain  it’s all about pain,” said Beck. On top of the pain, the venom’s chemicals cause sweating, diarrhea, vomiting and a drop in blood pressure.

The goal of all this misery is to make predators and enemies stay away. The slow-moving Gila monster can become easy prey, and it relies on its knack for a nasty bite to defend itself.

While the Gila monster’s venom might have caused misery in a few people, it has ended up helping many others; it’s now the source of a new drug, called Byetta, which treats type Type II Diabetes. Researchers believe that this drug is just scratching the surface of the potential that venomous species have  each creature in this list produces complex, potentially lifesaving compounds.

Something to keep in mind next time you curse the existence of that pesky bee or sneaky snake.

Link

30 spiders found in Bogota airport

 

30 spiders, of which the majority deadly, and two scorpions were found abandoned in a Bogota airport bus,reported Radio Caracol Monday.  

Most alarming for the authorities is that 17 of the spiders are poisonous and lethal, speaking of ten tarantulas, four wolf spider, two banana spiders and one black widow.

“Unlike many people believe, these animals are very dangerous because of their venom, some species can easily injure a person with just one bite and some can even lead to death. The person who left these animals behind clearly ignored the risk he exposed to Bogota”, said District Secretary for the Environment, Juan Antonio Nieto Escalante.

The boxes, in which the spiders and scorpions were transported, were marked with a stamp that read “aranario of Colombia”, a company that could not be located by the authorities. 

Link

Heat brings out Yuma’s poisonous predators

Story by Lance Cpl. Austin Hazard 

Photo by Lance Cpl. Austin Hazard

A Mohave rattlesnake stirs in a terrarium in the station pest controller’s office April 14. The snake, which is one of the most deadly North American snakes, was discovered in a field shower tent at the Barry M. Goldwater Range here April 6 during a Weapons and Tactics Instructor course exercise.

With summer approaching, residents here should be wary of increased insect and reptile activity in the area. 

Critters, such as scorpions, spiders and snakes, can be dangerous and are encountered more frequently during the warmer months. 

“The warmer it is, the more active they are,” said Jerry McCluskey, station pest controller. “I’ve already had more snake calls this season than I have the previous two years.” 

The bark scorpion, a common variety in the desert Southwest, can be identified by the way it lays its tail flat and to the side, instead of curved in the air. This allows it to squeeze into small and narrow cracks. Bark scorpions are particularly active at night and prefer dark damp areas. 

Another dangerous critter to look out for here is the female black widow spider. They are identified by their long, thin legs and red or orange hourglass-shaped marks on their undersides. Males are tan in color and considerably smaller. 

Black widow bites can go unnoticed and symptoms may not appear for up to six hours. Bites typically cause inflammation, progressive aches, muscle pain and in some cases may lead to death. 

Snakes, such as the sidewinder, Mohave and diamondback rattlesnakes are other warm-weather creatures to be wary of. 

The sidewinder rattlesnake is the most common snake found here, said McCluskey. It is identified by its sandy coloring, unique sideways movement and the hornlike point over each eye. 

Known to be one of the deadliest snakes in North America, the Mohave rattlesnake has a diamond pattern along its back, with black and white markings near the tip of its tail. The Diamondback rattlesnake, though not as dangerous, can be nearly identical in appearance to the Mohave. 

Despite being native to the area, the Mohave rattlesnake is reclusive and rarely seen, said McCluskey. 

Although a Mohave was recently found in a showering tent on the Barry M. Goldwater Range during the Weapons and Tactics Instructor course here, it was the first report in five years, said McCluskey. 

Younger rattlesnakes are often more dangerous than older ones. 

“The chances of getting bitten by a small rattlesnake are greater than with a large rattlesnake, because they get in smaller spots and they can’t warn you,” said McCluskey. “I usually only see the small ones, because the older ones are smart enough to know to stay away.” 

Younger rattlesnakes also have less control over their venom. An adult rattlesnake can decide how much venom it wants to inject into you, but baby rattlesnakes, they can’t control their venom, said McCluskey. 

Snake bites should always be considered poisonous, said McCluskey. The best thing to do for venomous bites and stings is isolate the injury, keep it elevated above the heart, and contact emergency services immediately. 

While waiting for medical help, victims should remain calm. 

“If you get excited, your heart rate is going to increase, and that’s going to speed up your circulation,” said Art Chavez Jr., station fire department assistant training chief. “With poison in your blood, that’s obviously bad.” 

Victims should not attempt to treat the wound in any way or remove the venom. 

“You can’t suck the venom out.” said McCluskey. “That’s a Hollywood thing.” 

If stung by a scorpion or spider, victims should be careful about removing stingers from the wound. 

“Scrape the stinger away with a credit card,” said Chavez. “Trying to pull it out could squeeze more poison out of it.” 

Anyone unsure if they were bitten by a spider or scorpion should call emergency services immediately. Taking an antihistamine while they wait for symptoms to appear can help reduce potential allergic reactions. 

McCluskey advises people to be aware of their surroundings and be cautious of small, dark, enclosed spaces in order to avoid bites and stings. Also, pay attention to anything that sounds like a rattlesnake’s warning. 

“Don’t ever put your hand where you can’t see it,” said McCluskey. “And be sure to shake out things like shoes, especially when they’ve been left outside.” 

Link

File this one under “makes sense, but seems like something a kid would come up with.” Apparently a diet of scorpions supercharges the snake’s venom!

Scorpion diet makes snakes more venomous

Published: April 10, 2009 at 2:59 PM

BANGOR, Wales, April 10 (UPI) — Deadly saw-scaled vipers that feed on scorpions are far more dangerous than those that eat mammals and reptiles, a Welsh researcher says. 

Axel Barlow of Bangor University began studying the snakes, one of the major killers in West Africa, to determine why anti-venom does not help some bite victims, the North Wales Chronicle reported. He found that the scorpion-eaters’ venom is about 30 times as toxic as that of other saw-scaled vipers.

Barlow is collaborating on his research with the Venom Research Unit at the Liverpool School of Tropical Medicine.

“The West African governments continue to buy this anti-venom from India, but it doesn’t work,” Barlow said. “It’s kind of intuitive that a snake’s venom is going to be more toxic to the type of animals that they feed on.”

Anti-venom is produced by injecting snake venom into horses, causing them to produce antibodies, and then harvesting their blood. To work, anti-venoms must be matched to the type of venom produced by the snake involved in the bite.