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At least 307 records · Page 17Linked to original sources
PubMed2004

Identification of some charcoal-black-pigmented CDC fermentative coryneform group 4 isolates as Rothia dentocariosa and some as Corynebacterium aurimucosum: proposal of Rothia dentocariosa emend. Georg and Brown 1967, Corynebacterium aurimucosum emend. Yassin et al. 2002, and Corynebacterium nigricans Shukla et al. 2003 pro synon. Corynebacterium aurimucosum.

Sixty-three clinical isolates of charcoal-black-pigmented, gram-positive coryneform rods were received for identification by the Centers for Disease Control and Prevention (CDC) and were provisionally designated CDC fermentative coryneform group 4 (FCG4). Forty-five of these were characterized by morphological, physiologic, antimicrobial susceptibility, cellular fatty acids, 16S rRNA gene sequencing, and DNA-DNA hybridization analyses. Nitrate reduction, cellular fatty acid analysis, 16S rRNA gene sequencing, and DNA-DNA hybridization studies segregated these strains into two groups: FCG4a (8 strains) and FCG4b (37 strains). The FCG4a strains, only one of which was from a female genitourinary source, produced cellular fatty acid and biochemical profiles similar to those observed with reference strains of Rothia dentocariosa and Rothia mucilaginosa, while the FCG4b strains were similar to Corynebacterium species. DNA-DNA hybridization analysis demonstrated species-level relatedness among six FCG4a tested strains and showed that they were a charcoal-black-pigmented variant of R. dentocariosa. Sixteen isolates of the FCG4b group, mainly from female genitourinary tract specimens, as well as the type strains of two recently named species, Corynebacterium aurimucosum and Corynebacterium nigricans, were shown by DNA-DNA hybridization analysis and the sequencing of the 16S rRNA gene to be related at the species level and unrelated to the type strain of R. dentocariosa; therefore, the Corynebacterium-like strains were classified as a charcoal-black-pigmented variant of C. aurimucosum, because this name has nomenclatural priority over C. nigricans. These findings indicate that FCG4 represents a heterogeneous group that contains pigmented variants of both R. dentocariosa and C. aurimucosum; hence, the descriptions of both R. dentocariosa and C. aurimucosum have been amended to include charcoal-black-pigmented variants, and C. nigricans is a pro synonym of C. aurimucosum.

Centers for Disease Control and Prevention, U.S.↗
PubMed1999

Beyond overpopulation: a comment on Zawistowski et al. and Salman et al.

The intentional production and destruction each year of millions of companion animals is a sobering fact. The need for meaningful statistical data on this phenomenon is urgent. No less pressing, however, is the need for a conceptual framework to make sense of the empirical findings. The conventional focus on overpopulation is inadequate and places unnecessary limits on the way in which the problem is approached. I propose in its place a market-based model that takes seriously the role of consumer demand and considers the flaws and inefficiencies distorting the market for companion animals. Shifting attention to the choices consumers make in acquiring and discarding animal companions suggests new possibilities for change and provides a useful focal point for further empirical work.

Journal Article↗
PubMed2002

Extreme-ultraviolet thin-film interference in an Al-Mg-Al multiple-layer transmission filter.

Thin-film interference has been observed in the transmittance of a filter consisting of 263.5-nm-thick magnesium with a 32.2-nm-thick aluminum layer on each side. The transmittance, measured by synchrotron radiation, has an oscillatory behavior in the 25-70-nm wavelength range. On the basis of the calculation of the transmittance, the oscillatory behavior results from interference associated with the relatively transmissive magnesium and aluminum layers and the reflection from the oxidized aluminum surface layers. The bandpass performance of magnesium and aluminum layers deposited on a silicon photodiode detector is presented.

Journal Article↗