Seven quinolone antibiotics were tested against 115 isolates of methicillin-resistant Staphylococcus aureus. The MICs for 90% of the strains tested were 0.5 microgram/ml for A-56619, A-56620, ciprofloxacin, and ofloxacin; 2.0 micrograms/ml for amifloxacin and enoxacin; and 4.0 micrograms/ml for norfloxacin. Killing kinetic studies showed a similar killing rate for all seven antibiotics.

Ammonium chloride added to normal resident mouse peritoneal macrophages reduced the rate of killing of ingested Saccharomyces cerevisiae. It is suggested that this is attributable to the inhibition by ammonia of phagosome-lysosome fusion or of lysosomal protein degradation and that, consequently, lysosomal mechanisms contribute to the normal killing of these yeasts.

a radio assay employing 14c-uridine to measure the intracellular killing of candida albicans by phagocytes is presented. the principle of this new method is that after killing of candida albicans by phagocytes rna synthesis stops and therefore uridine uptake is diminished whilst viable candida in cultures would take up uridine and as a result, high cpm counts can be obtained within 135 min. of ...

Shayegani, Mehdi G. (U.S. Veterans Administration Hospital, Philadelphia, Pa.), and Stuart Mudd. Role of serum in the intracellular killing of staphylococci in rabbit monocytes. J. Bacteriol. 91:1393-1398. 1966.-Although some intracellular killing occurs in rabbit monocytes with heated normal serum or even in monocytes washed three times with Hanks' solution and with staphylococci not exposed t...

A recombinant Escherichia coli K-12 strain, transformed with a modified bacterial luciferase gene (luxABCDE) from Photorhabdus luminescens, was constructed in order to monitor the activity of various antimicrobial agents on a real-time basis. This E. coli-lux emitted, without any addition of substrate, constitutive bioluminescence (BL), which correlated to the number of viable bacterial cells. ...

Meiotic drivers (MDs) are selfish genetic elements that able to become overrepresented among the products of meiosis. This transmission advantage makes it possible for them spread in a population even when they impose fitness costs on their host organisms. Whether an MD can invade population, and subsequently reach fixation or coexist stable polymorphism, depends one hand biology organism, incl...