others are diagnosed too late to prevent the dramatic impact of the disease on the eyes kidneys nerves and circulation in tonga for example traditional lowfat sources of protein such as fish cost between per cent and per cent more than either lamb flaps or imported chicken parts the local taro plant costs more than imported starches such as bread and rice thus not only are the health consequences of these imported foods detrimental but the availability of these cheap imports is also constraining the development of domestic markets in the pacific diabetes is present in per cent of the torres strait islanders of australia per cent of the residents of the kingdom of tonga and per cent of the residents of nauru