Many of Canada's northern First Nation communities experience difficulty recruiting and retaining appropriate nursing staff and must rely on relief nurses for short-term coverage. The latter often are not adequately prepared for the demanding nature of the practice. This study examined the consequences of nursing turnover on the continuity of care provided to residents of three Ojibway communities in northern Ontario. The findings are based on a review of 135 charts of oncology, diabetes, and mental health clients, and on interviews with 30 professional and paraprofessional health-care providers who served the communities. Nursing turnover is shown to detrimentally affect communications, medications management, and the range of services offered; it also results in compromised follow-up, client disengagement, illness exacerbation, and an added burden of care for family and community members.