Seracult guaiac tests are a qualitative aid in the diagnosis of colorectal cancer. They are designed for use in routine physical exams in doctors´ offices, hospitals, clinics and laboratories. Tests are available in single-slide, triple-slide or tape design and in kit form for mailing. Each test consists of guaiac-impregnated paper in slide form with front and back flaps. Front flap opens for specimen smear. Back flap opens for development. Simple and easy to use by examiner or patient and easy to read, accurate results.