The presence or absence of a predetermined target microbe in a sample is determined by adding a testing medium to the sample, or vice versa. The testing medium provides a selective growth medium for the target microbe and includes a specific nutrient which only the target microbe can metabolize. This specific nutrient is modified by attaching a sample-altering moiety thereto, thereby converting the nutrient to a nutrient-indicator. The sample-altering moiety is activated to alter the sample only if the specific nutrient is metabolized by the target microbe. The sample-altering moiety can be a material which changes the color of the sample (visible or non-visible) or changes an electrical characteristic of the sample, or alters some other detectable characteristic of the sample. The testing media does not have to be kept sterile, and the testing procedure does not have to be performed in a sterile environment.
The present invention provides polynucleotides derived from cDNA of novel type of hepatitis C virus named KHCV, polypeptides encoded therein, and antibodies directed against the polypeptides; and also provide diagnostics and vaccines employing any of the above materials as active ingredient(s).
Method and medium for detecting vancomycin-resistant enterococcus
申请人:Idexx Laboratories, Inc.
公开号:US20020132285A1
公开(公告)日:2002-09-19
A microbe-specific medium for detection of vancomycin-resistant Enterococci in a test sample within 24 hours and preferably within 18 hours. The testing medium provides a selective growth medium for vancomycin-resistant Enterococci and includes specific nutrient indicators which only the target microbe can significantly metabolize and use for growth. The nutrient indicator contain a nutrient moiety and a detectable moiety linked together by a covalent bond. The nutrient indicators produce detectable signals only if the nutrient indicators are hydrolyzed by the Enterococci specific enzymes including &bgr;-glucosidase and pyrrolidonyl arylamidase.
Optionally crosslinkable coatings, compositions and methods of use
申请人:3M Innovative Properties Company
公开号:US20020176997A1
公开(公告)日:2002-11-28
Coatings for hard tissue and surfaces of the oral environment are provided that reduce adhesion of bacteria and proteinaceous substances to these surfaces. Methods of reducing adhesion of these materials to such surfaces, and polymers for incorporation into such coatings arc also provided.