Hi:
Rob is right about the animal, it has to be put down but I can tell you the cause because I have seen it 3 times. It is an occurance of Spondylosis secondary to a Salmonella arizoniae infection. I had a male Cerastes vipera necropsied by Zoo Vet Pathologist that is a reptile specialist. That was the diagnosis and no cure.
Put the Naja out of it's pain.
I do think think the poster waited to long to post the picture of the sick Naja and get help but was correct to do so in the end. As sad as the picture is to see, where else is the private venomous community to get help for their sick animals but here on forums like this. One picture is worth a thousand words , although those words could not save this animal but maybe the next one. Visitors should not be be reluctant to ask for this type of help but please ask early and not late as in this case.
Personally I've spent a complete day on the phone to area Vets trying to get one of them to look at a small sick Bitis cornuta. None of the 30+ I called would see a venomous snake, period! I could understand their reluctance if I wanted to come in with a 7 ft Black Mamba but a 7in Cornuta that was in no shape to put up any fight. Beside I would do all of the restraining and take a bite to protect anyone present. One of the AZA's biggest gripe towards the private keepers second only to the lack of A/V is that private keepers cannot care for their animals correctly. This is true to some extent, however, not because we would not spend the $$ on a Vet if one of our snakes needed care but because the Vets don't want anything to do with Hot snakes & their keepers. AZA institutions have staff Vets that like it or not take care of that institutions Hot collection.
Al
A. taylori with occurance of spondylosis in relation to a Salmonella arizoniae infection. Notice the spine is fused on the 2nd through the 6th band. This animal was put down shortly after this picture was taken before it started to rapidly loose weight.

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Confidence is what you feel before you comprehend the situation.