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1 Research and Development Division, Smith, Kline, and French Laboratories, Philadelphia, Pa.
The appropriate selection of commercially obtained, adult, intact, male rats, has provided a means of screening compounds for their pharmacodynamic ability to evoke the alarm reaction. The selection of these rats was based on the following criteria: 1) an initial blood eosinophil count of more than 62 eosinophils per c.mm. blood; 2) an eosinopenic response of less than 15 per cent to an intraperitoneal injection of glucose solution; and 3) an eosinopenic response of greater than 25 per cent to an intraperitoneal injection of epinephrine.
Submitted on June 23, 1952