Fortunately, Australia does not have many of the parasitic worm infect
ions, such as filariasis, onchocerciasis and dracunculiasis, that are
important on a global scale. Nevertheless, several medically important
parasitic worms are endemic in Australia. Intestinal nematodes occur
mostly in the tropical north although threadworm is ubiquitous. Hydati
d disease and tapeworm infections occur especially in sheep and cattle
farming regions.