This is Enterobacteria Phage T4. More accurately, it is an amazing glass sculpture of the Phage T4 made by a group of glass blowers in the UK that specialise in such things.
Of all human endeavours, I think glassblowing might be the one I find the most astounding. There are a whole bunch of other works in the Glass Microbiology gallery which are well worth checking out. It looks you can even buy some of the works should you want give somebody AIDS for Christmas.