How do I start libvirt in Fedora 19?

[Singapore Citizen Mr. Teo En Ming (Zhang Enming)]

Hi,

I have just installed virt-manager in Fedora 19. I have looked into the 
/etc/init.d directory but I can't find any init scripts for libvirt.

Is libvirt using systemd, and if so, how do I start it?

Thank you very much.