A test strip is provided for visually indicating the effectiveness of selected antibiotics, bactericidal drugs, or the like in combatting microorganisms in specimens taken from a patient. The test strip comprises a porous, water absorbent or adsorbent body which may be made of plastic foam material,...http://www.google.de/patents/US4087332?utm_source=gb-gplus-sharePatent US4087332 - Indicator for use in selection of bactericidal and bacteristatic drugs and method for producing same
