Paul W. Johnson

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Methane enrichment of twenty-three 100-ml portions of seawater from three stations in the Sargasso Sea yielded the same obligate type I methanotroph. It is pigmented white, requires NaCl, grows well in seawater with either methane or methanol, but not on other C1 compounds nor on C−C bonded organic matter, and it uses either ammonia or nitrate but not(More)
The entomopathogenic fungus Metarhizium anisopliae is highly pathogenic to the black-legged tick, Ixodes scapularis. Spore concentrations of 10(8)/ml for engorged larvae and 10(7)/ml for engorged females resulted in 100% tick mortality, 2 wk postinfection. The LC50 value for engorged larvae (concentration to kill 50% of ticks) was 10(7) spores/ml.(More)
OBJECTIVE The purpose of this study was to evaluate the diagnostic utility of specific characteristics on T1-weighted MR images in the diagnosis of pedal osteomyelitis. MATERIALS AND METHODS The study included all adult patients who underwent MRI of the foot for evaluation of suspected osteomyelitis over an 11-month period. Images were retrospectively(More)
Natural killer (NK) cells have been proposed as a first level o f defense against the initiation and spread of tumors in vivo (1). Recent studies with syngeneic mice have directly corre la ted levels o f NK activity with resistance to t u m o r growth (reviewed in 2). However , most o f these investigations have used longpassaged t ransplantable t u m o r(More)
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