BOTULISM AND HOME CANNING 27 



16. Some spores of CI. botulinum are very heat resistant and practical boiling 

 water bath process times are inadequate to destroy them. Six to twelve hours in 

 a boiling water bath would be necessary to give the same degree of sterilization 

 as the recommended process times at 240°F. (116°C.). 



17. Experimental data indicate that many 240^F. (116^C.) process times for 

 vegetables as recommended at present are more severe than necessary and can 

 be reduced, Avith a resulting improvement in the quality of the canned products 

 when additional information is available and home-canning techniques are 

 improved. 



18. It is important that pressure canners be kept in good operating condition 

 and be correctly used. Otherwise understerilization mav result. 



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 Bronfenbrenner, J., and Schlesinger, M. J., Soc. Expt. Biol, and Med. Proc 



18:304-305 (1920). 

 Burke, G. S., J. Bact. 4:541-553 (1919). 

 Burke, G. S., J. Infect. Dis. 32:433-438 (1923). 

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prevention. 8 p. (1943). 

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(.1943). 

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Co., Baltimore, Md. 266 p. (1928). 

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meeting, Soc. Am. Bact. In press, Food Res. (1945). 

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Geiger, J. C, U. S. Pub. Health Serv. Repts. 38:(39), 2249-2252 (1923). 

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119 p. (1922). 

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