What are the smallest genomes?

Question

anonymous · Answer

viruses may be some of the smallest

anonymous · Answer

cholera

anonymous · Answer

borrelia burgdorferi
re:users.rcn.com

anonymous · Answer

causes Lyme Disease

anonymous · Answer

It is 1.44 x 10^6,  1738 genes
see "Spirochetes"

anonymous · Answer

STDs

anonymous · Answer

the smallest genome should be the one owned by an artificial cell whose genes have been deleted one by one until only the ones necessary for survival remained. but it is an artificial organism engeneered by Craig Venter. i wouldn't say viruses own the smallest genomes. i know some of them have genomes big enough to question the traditional view of virus genomes as small and limited to genes coding for proteins indispensible for their life cycle.

anonymous · Answer

The "genome" doesn't only refer to the genes of an organism but also to the non-coding DNA/RNA sequences. 
Turning to your question, as a biology undergraduate I've heard that Mycoplasma genitalium is currently known to have the smallest genome (580.000bp).

anonymous · Answer

mycoplasma

anonymous · Answer

Virus 	Bacteriophage MS2 	3,569 	3.5kb 	0.000002 	First sequenced RNA-genome[8]