Description
Naja Siamensis Snake Venom | Indochinese Spitting Cobra Venom:
Naja Siamensis Snake Venom | Indochinese Spitting Cobra Venom is extracted from a snake called Naja Siamensis.
More details about Naja Siamensis Snake Venom | Indochinese Spitting Cobra Venom:
| Purity | > 99 % |
| Form | Lyophilized Powder |
| Packaging | In vacuum sealed glass vials, in secured parcel. |
Like most other spitting cobras, its venom is primarily a postsynaptic neurotoxin and cytotoxin (necrotizing or tissue-death).
Like all cobras, this species shows variation in venom toxicity based on different factors (diet, locality, etc.). In a study of specimens from Thailand, the IV LD50 was 0.28 μg/g (0.18-0.42 μg/g).
Fischer and Kabara (1967) listed a value of 0.35 mg/kg via IP route.
Another study gave an LD50 range 1.07-1.42 mg/gram of mouse body weight.
Bite symptoms include pain, swelling and necrosis around the wound. The bite of this snake is potentially lethal to an adult human.
Deaths, which generally happen due to paralysis and consequent asphyxiation, mainly occur in rural areas where the procurement of antivenin is difficult.
Taxonomic Classification:
| Name | Naja Siamensis |
| Common Name(s) | Indochinese Spitting Cobra, Thai Spitting Cobra, Siamese Spitting Cobra. |
| Kingdom | Animalia |
| Phylum | Chordata |
| Class | Reptilia |
| Order | Squamata |
| Suborder | Serpentes |
| Family | Elapidae |
| Genus | Naja |
| Species | N. siamensis |
About Naja Siamensis Snake:
The Indochinese spitting cobra (Naja siamensis) (Thai: งูเห่า, pronounced: nguu hao) also called the Thai spitting cobra, Siamese spitting cobra, is a species of spitting cobra found in Southeast Asia.
Description:
This is a medium-sized elapid, with a more slender build compared to most other cobras within the genus Naja. The body colour of this species is variable from grey to brown to black, with white spots or stripes.
The white patterning can be so prolific that it covers the majority of the snake.
The highly distinctive black and white colour phase is common in central Thailand, specimens from western Thailand are mostly black, whereas individuals from elsewhere are usually brown.
The hood mark can be spectacle-shaped, irregular or missing altogether, especially in adults. Adults average between 0.9 to 1.2 metres (3.0 to 3.9 ft) in length, and can potentially reach lengths of 1.6 metres (5 ft), although this is considered rare.
Body mass for adults can be tends to be around 1,600 grams.
This species should not be confused with the monocled cobra (Naja kaouthia), which has similar habitat, size and appearance.
Another distinguishing feature is that this species is a “true spitter”; it readily spits venom, but rather than a stream of venom as seen with many other “spitting cobras”, this species ejects a “mist” rather than a “stream”.
Further, the reported spitting range of this species is approximately 1 metre (3.3 ft), which is the lowest range of any of the spitting cobras.
Although Wüster (unpublished) reports that N. siamensis readily spits and may have a longer range, closer to 2 metres (6.6 ft), which comes out in a stream.
Scalation:
There are 25-31 scale rows around the hood, 19-21 just ahead of midbody; 153-174 ventral scales, 45-54 subcaudal scales, and basal pairs are sometimes undivided.
Distribution and habitat:
It is found in Southeast Asia, including Thailand, Cambodia, Vietnam, and Laos. May occur in eastern Myanmar but no records are known.
It has been reported from Taiwan where it was released to the wild based on folklore Buddhist practices.
It occupies a range of habitats including lowlands, hills, plains, and woodland.
It can also be found in jungle habitat and it is sometimes attracted to human settlements because of the abundant populations of rodents in and around these areas.
Behavior and diet:
It is a primarily nocturnal species. It shows variable temperament depending on the time of day it is encountered.
When threatened during daylight hours, the snake is generally timid and seeks refuge in the nearest burrow. However, when the snake is threatened at night, it is more aggressive and is more likely to stand its ground, rear up and display its hood and spit out its venom.
If spitting venom doesn’t work, it will strike and bite as a last resort.
When biting, this species tends to hold on and chew savagely. It usually feeds on rodents, toads, and other snakes.
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