10 Cobras mais venenosas do Mundo

10 Most poisonous Snakes in the World
There are many contradictions regarding the most poisonous snakes so this ranking is based on those who have the greatest ability to kill a lab rat and a human with a single bite! All calculations are done in the laboratory, by measuring LD50.
In toxicology, median lethal dose (LD50 or LD50,Lethal Dose) is the dose required for a given substance or type of radiation to kill 50% of a population under test (typically measured in milligrams per kilogram of body weight of individuals tested).
The test was created by JW Trevan in 1927, but is to be deprecated in some jurisdictions at the expense of the testing procedure as a fixed dose, however the concept and calculating the LD50 for comparison are still widely used, although considered weak as a useful measure of toxicity.

10. Surucucu
Lachesis muta
Average by Poison Sting: 400mg
LD50 Rat: 6mg/kg
Estimated at Human LD50: 420mg
Certainty of death from bites: Death of one person for every 1,650 rats
The Bushmaster is found in the rain forests of South America and can easily reach 9 feet (3m) long, sometimes more than 12 feet (4m), making it the largest snakes in the world. They are known internationally under the name Bushmaster.
The Surucucus subfamily of pit vipers are so called because they have a pit on each side of the head, that act as infrared heat sensors, allowing them to trace the body heat of their prey.
Although the poison it is relatively weak in toxicity compared with other poisonous snakes on this list, its average volume of bite yields up to 400mg (one of the largest injections of snake venom in the world).

9. Snake Navy Nozzle
Enhydrina schistosa

Average by Poison Sting: 8.5 mg
LD50 Rat: 0.11 mg / kg
Estimated at Human LD50: 7.7 mg
Certainty of death from bites: Death of one person for every 1930 mice.
This species is found around the coast of the Indian Ocean from Madagascar to Australia. It is notoriously aggressive and aloof; accounting for nine out of ten deaths from snake bites from the sea.
Like most sea snakes, this species is highly poisonous, however, the volume injected into each bite is low and the symptoms of poisoning usually appear trivial or nonexistent. For this reason, victims often do not seek immediate health care until it is too late. Death is usually due to paralysis of the respiratory or cardiac arrest within 12 hours after the bite.

8. Carpet Viper
Echis carinatus

Average by Poison Sting: 20mg
LD50 Rat: 0.15 mg / kg
Estimated at Human LD50: 10.5 mg
Certainty of death from bites: Death of 2 people for every 3300 mice.
I honestly do not know how it is called in Portuguese, but the name literally translated is Carpet Viper Echis carinatus or latin, it is relatively small (up to 30 inches or 75 centimeters) and moody, it is found in Africa (north) and Middle East.
These vipers are fast in the boat and have high mortality rates in people bitten, it is believed that these vipers are responsible for more human deaths than any other snake species combined together. Its poison is very virulent and hemotoxic. The venom causes internal bleeding spontaneous sometimes for several days after the prick has occurred.

7. Russel Viper
Daboia russelii

Average by Poison Sting: 190mg
LD50 Rat: 0.75 mg / kg
Estimated at Human LD50: 52.5 mg
Certainty of death from bites: Death of 3 people for every 6300 mice.
Found in the Indian subcontinent and Southeast Asia, this snake can reach up to 5 feet. The Russell vipers tend to avoid dense forests and are usually found in open fields, grassy areas or thick. These snakes are usually calm and slow and will not react to provocation, unless there is really an abuse, but they can become very aggressive to the point of attack with such force that they raise your entire body off the floor.
Their venom is not the strongest of the vipers but the volume is considerable. Much like the previous vipers, the venom is hemotoxic and will cause massive bleeding. Severe pain in the area of ​​the bite can last up to a month.

6. Black Mamba
Dendroaspis polylepis

Average by Poison Sting: 85mg
LD50 Rat: 0.32 mg / kg
Estimated at Human LD50: 22.4 mg
Certainty of death from bites: Death of four human rats for each 6640.
Unlike what the name suggests, the Black Mamba is not black, at least not from the outside. The name derives from the color black into her mouth. This snake is sub equatorial African record holder for the fastest snake in the world, with speeds of up to 23km, reaching up to 4.3 m in length.
Before the availability of serum antiophidic, the bite of this snake was a veritable death sentence, the mortality rate was 100%. Its venom is dendrotoxin and cause of death of his victims is generally attributed to respiratory muscle paralysis, leading to suffocation. It can potentially kill a human in less than 20 minutes.

5. Cobra Brown
Pseudonaja textilis

Average by Poison Sting: 10mg
LD50 Rat: 0.036 mg / kg
Estimated at ELD50 Human: 2.52 mg
Certainty of death from bites: Death of 4 people per 6950 mice.
A native of Australia, this snake can grow up to 2 meters long. These snakes are known to have the second most powerful venom of all land snakes. Fortunately the Cobra Brown usually shuns humans, although it can be aggressive if provoked or if the snake feel trapped.
Its venom is composed mainly of potent neurotoxins and blood coagulants. The bite results in progressive paralysis and formation of blood clots. The victims usually experience shock, followed by coma and ultimately death.

4. Common Death Adder
Acanthophis antarcticus

Average by Poison Sting: 152mg
Rat LD50: 0.5 mg / kg
Estimated at Human LD50: 35mg
Certainty of death from bites: Death of 4 people per 7600 mice.
The Death Adder is another of snakes native to Australia. They are relatively small - a maximum of up to 1m - but their fangs are among the largest in relation to their body size. The Death Adder is an aggressive snake and will not flee from humans, instead they will remain motionless and imperceptibly mixed with leaves, sand or debris until someone or something passes nearby.
The poison is very strong and the injected volume is pretty high for the size of the snake, which is largely neurotoxic and postsynaptic, causing paralysis of respiratory muscles leading to death essential.

3. Tiger Snake
Notechis scutatus

Average by Poison Sting: 112mg
Mouse LD50 of 0.21 mg / kg
Estimated at Human LD50: 14.7 mg
Certainty of death from bites: Death of 8 people per 13,333 mice.
Can you guess where this snake lives? You guessed it, Snake Tiger happily walks around southern Australia and Tasmania. These snakes can differ widely in their appearance, but they usually have stripes that resemble those of a tigre (hence the name) and can reach a length of up to 2 meters. These snakes are not naturally aggressive to humans, they tend to announce their presence and then try to escape, uffa yet well ..
The Tiger Snake has a powerful cocktail of drugs. The venom is one of the most powerful, is both hemotoxic, neurotoxic and myotoxic. Death usually comes with diaphragmatic paralysis and consequently by asphyxiation.

2. Common Krait
Bungarus caeruleus

Average by Poison Sting: 30mg
LD50 Rat: 0.04 mg / kg
Estimate LD50 in Human: 2.8 mg
Certainty of death from bites: Death of 11 people for every 18,750 mice.
The Kraits exist in a variety of species, there are 12 species in total and they are all extremely lethal. The Common Krait with an average length of 1m is just one of those species that can be found in the jungles and bushes low to the Indian subcontinent. They are predators of other snakes and may even turn cannibalistic. They are not aggressive with humans, even when provoked, preferring to hide the attack. The bites are usually the result of close encounters in populated areas.

1. Inland Taipan
Oxyuranus microlepidotus

Average by Poison Sting: 77mg
Rat LD50: 0,025 mg / kg
Estimated at Human LD50: 1.75 mg
Certainty of death from bites: Death of 44 people for every 77,000 mice.
Guess where it comes from is snake? Of course Australia! This however, has a special place in the list, since it is considered the most venomous snake in the world - the one with the greatest potential to kill. Of course there are other sea snakes whose venom is even stronger when compared dropwise, however, the volume of venom is far from enough to consider them a threat to life.
The Inland Taipan is one of three known species of Taipans, the other path are: the Coastal Taipan and Taipan Central Ranges. The latter two can easily occupy the 2nd and 3rd position in this list because they are more poisonous than the Krait policy, but because of the diversity and since they belong to the same genre I chose to include only the worst of them all, the Inland Taipan .
This Taipan can reach up to 2.5 m in length. Their venom is neurotoxic and also a cocktail as all other snakes with neurotoxins this will mess with the nervous system and cause paralysis, ultimately ending in suffocation.


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