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D-values for Salmonella in a ground beef system were established at 125, 135 and 145 F (51.6, 57.2 and 62.7 C). The D-values determined at these temperatures were 61–62, 3.8–4.2 and 0.6–0.7 min, respectively. These values were used to develop a processing table that insured elimination of 10 million inoculated Salmonella in the center of beef roasts at temperatures sufficiently low to maintain the characteristic red color of “rare” roast beef. The effectiveness of the processing values in eliminating 107 Salmonella was confirmed by processing inoculated beef roasts under commercial conditions. Additional processing procedures necessary to insure elimination of Salmonella from the surface of dry roasted beef were also developed, since it was found that Salmonella could survive on the dry roasted beef surfaces under some circumstances.

Three late, serai‐exotic corn (Zea mays L.) synthetics were selected (5% level) for early silking by sib‐mating over a six‐generation period; then the seven cycles (including original forms) were compared in performance trials at three plant densities over 2 years. Virtually every ' trait measured changed significantly due to selection only for early flowering. Effect per cycle averaged: 1.00 q/ha yield increase; 1.2 points of percent H2O decrease; 2.8% stalk breakage increase; 7.2‐cm plant height decrease; 5.2‐cm ear height decrease; 1.8 days less to flower; and 0.3 days less silk delay. The decrease in silk delay suggests that the method may be useful in selecting materials for adaptation to high plant densities. We observed a maturity‐influenced cycle‐by‐year interaction for yield where early flowering cycles had a distinct advantage in a cool, short season.

Abstract: Mass screening for SARS-CoV-2 infection in long-term care facilities revealed significantly higher prevalence of infection in facilities that screened in response to a known infection compared to those that screened as a prevention measure. Response facilities had a SARS-CoV-2 prevalence of 28.9% while prevalence in preventive facilities was 1.6% (p <0.001).

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