The roles of pH and ionic species in sulfur dioxide- and sulfite-induced bronchoconstriction.

Sulfur dioxide (SO2) and sulfites are well-described causes of bronchoconstriction in persons with asthma that are chemically related and, therefore, may share a common mechanism of action. When either sulfur species dissolves in aqueous solutions, a pH-dependent equilibrium is established predominantly among bisulfite ion (HSO3-), sulfite ion (SO3=), and SO2. In addition, hydrogen ions may be released.

Successive bacteremias with "Campylobacter cinaedi" and "Campylobacter fennelliae" in a bisexual male.

A bisexual human immunodeficiency virus-seropositive male had successive bacteremias with "Campylobacter cinaedi" and "Campylobacter fennelliae." Because final identification of both isolates was not completed until 1 month after the last admission of the patient, a novel and nonstandardized antimicrobial susceptibility testing method was useful in guiding timely antimicrobial therapy.

In vitro activity of cefmetazole, cefotetan, amoxicillin-clavulanic acid, and other antimicrobial agents against anaerobic bacteria from endometrial cultures of women with pelvic infections.

The MICs of the new antimicrobial agents cefmetazole, cefotetan, and amoxicillin-clauvulanic acid were compared with the MICs of other antimicrobial agents against anaerobic bacteria from endometrial cultures from women with pelvic inflammatory disease or endometritis. The activity of cefmetazole was similar to that of cefoxitin and generally greater than that of cefotetan. Amoxicillin-clavulanic acid was generally more active than all cephamycins tested.

Receptor mediated leukemogenesis: murine leukemia virus interacts with BCL1 lymphoma cell surface IgM.

Murine leukemia virus (MuLV) induced T-lymphomas bear surface receptors specific for the leukemogenic retroviruses they produce. We have proposed that such virus receptors on lymphoid tumors are the antigen-specific receptors present on their normal lymphocyte counterparts. To determine the relationship between immune receptors and virus receptors on malignant lymphocytes, a spontaneous B cell lymphoma, BCL1, was investigated.