SPECIFIC AND NONSPECIFIC RESISTANCE 



Virus Strain Mortality ratios at 1** days*** 



2° C 21° C 



B-1* U/U 1/U 



B-2* !/*♦ 0/U 



B-3* U/U 3/U 



B-U* 1/U 0/U 



B-5* 1/U 0/U 



B-1 (Conn. 5)** 2/U 0/U 



Cold Control 0/U 



Table XIV. Compuridon of liiffcrenl Tyi)c I^ Coxsackie virus strains on mortality 

 production in unacclinializLni adult mice. •University of Utah, Department of Micro- 

 biology Stock Strains. ••Obtained from Dr. D. L. Walker. •••All challenge doses 

 approximately 5 x 10"* PFU i. p. 



Virus Mortality ratios at lu days* 



20 c 21* C 



University of Utah, B-1 19/20 0/20 



Conn. 5, B-1 9/20 0/20 



Table XV. Mortality ratios of unacclimatized adult mice challenged with Type B-1 

 Coxsackie virus. *Challenge dose = 5 x 10*^ PFU i. p. 



183 



