Ratemiidae is a family of lice within Anoplura that is a parasite of Perissodactyla. Ratemiidae is capable of transferring diseases such as typhus to their hosts. These lice are found primarily in China.
Ratemiidae are capable of transferring the bacteria that causestyphus to their host. This is done when a louse pierces the skin of its host and begins to suction out blood, in the process the louse's saliva is injected, along with the bacteria, into the host.