A laser printer for forming toner images on sheets includes a duct wall and a shutter. The folded main print product has front and rear legs extending from the fold. The intensity of a signal, such as a fluorescent, luminescent or colorimetric signal, at an emission wavelength of a product of the beta-lactamase on the subject is correlated to drug susceptibility. Communication between the TTY device and far-end user may be via a direct connection between the TTY and the associated PBX, or via a connection between the TTY and the PC that is hosting the soft phone application. This invention is for blood coagulation and sterilization applications.