INTRODUCTION: In 1994 the University of Manchester medical school introduced an integrated undergraduate course using problem-based learning throughout. This study explores differences between the new and old (traditional) course graduates' attitudes to, and conceptualization of, teamwork. METHODS: Semi-structured interviews were conducted with 24 graduates of the traditional course (graduating in 1998) and 23 from the new course (1999 graduates), representing approximately 14% of graduates from each cohort. Theories were then developed from concepts emerging from the data. RESULTS: The new course graduates (NCGs) had a broader view of members of a health professional team. The NCGs believed that the medical team should provide support and were more comfortable consulting them when faced with problems. CONCLUSIONS: The new curriculum has had some impact on conceptualization and attitude to teamwork. However, further development is required if graduates are to see themselves as part of a multi-professional team.