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Biomedical subjects

R L Cohen

Publications and source records attributed to R L Cohen.

108 records · Page 6Linked to original sources
PubMed1972

Hemagglutination inhibition for serogrouping of Neisseria meningitidis.

A hemagglutination inhibition (HI) test has been studied as an alternative to bacterial agglutination (BA) for serogrouping strains of Neisseria meningitidis isolated from clinical specimens. The HI test consists of polysaccharide antigens adsorbed to sheep red blood cells which were then agglutinated by group-specific antisera. Supernatant fluids from suspensions of meningococci were used to inhibit the agglutination. Results of the two tests agreed for 381 (80%) carrier strains. Of the remaining 95 strains, 82 (86%) were identified by HI although they were nongroupable by BA. Thus, the HI test has been shown to be more highly specific and sensitive and to be more economical of reagents and time than the BA test.

Adsorption↗
PubMed1971

Meningococcal infections. 3. Studies of group A polysaccharide vaccines.

Studies with 4 lots of group A meningococcal polysaccharides in 458 adult human volunteers showed that such vaccines are nontoxic and highly immunogenic. Comparisons of jet injection and subcutaneous (needle) methods of administration showed that both were equally immunogenic.

Antibody Formation↗
PubMed1968

Modified biochemical tests for characterization of L-phase variants of bacteria.

Biochemical capabilities of bacterial and L-phase organisms of 15 bacterial strains were examined by using a variety of modified routine diagnostic biochemical tests. The results demonstrated that 13 of the tests examined were suitable for use with L-phase variants, that L-phase variants and revertant bacterial phase organisms retained diagnostically significant capabilities of the respective bacterial or L-phase organisms from which they were derived, and that the 13 biochemical tests could be usefully employed to relate a given L-phase variant to a given bacterial phase organism, to distinguish L-phase variants of different species, and to aid in the identification of nonreverting L-phase variants.

Arginine↗
PubMedDate not supplied

Disseminated histoplasmosis, invasive pulmonary aspergillosis, and other opportunistic infections in a homosexual patient with acquired immune deficiency syndrome.

A homosexual man with the acquired immune deficiency syndrome had an unusually wide array of opportunistic infections. Despite antibiotic treatment over a period of two and a half years, the patient died. Perianal herpetic ulcers, oral candidiasis, cytomegalovirus infection, and disseminated infections with both Histoplasma capsulatum and Mycobacterium avium-intracellulare were diagnosed during illness. An autopsy revealed invasive pulmonary aspergillosis and a cerebellar lesion caused by cytomegalovirus. The latter was probably responsible for the patient's gait disturbance.

Acquired Immunodeficiency Syndrome↗