Michigan State University Extension
Preserving Food Safely - 01600953


     Do  not taste food from a jar with an unsealed  lid  or
food  which  shows signs of spoilage.  You can  more  easily
detect  some types of spoilage in jars stored without  screw
bands.   Growth of spoilage bacteria and yeast produces  gas
which  pressurizes  the food, swells lids,  and  breaks  jar
seals.  As each stored jar is selected for use, examine  its
lid  for  tightness and vacuum.  Lids with  concave  centers
have good seals.                                            

     Next,  while  holding  the jar upright  at  eye  level,
rotate  the jar and examine its outside surface for  streaks
of  dried food originating at the top of the jar.   Look  at
the contents for rising air bubbles and unnatural color.    

     While  opening the jar, smell for unnatural  odors  and
look for spurting liquid and cotton like mold growth  (white
blue, black, or green) on the top food surface and underside
of lid.                                                     

     Carefully  discard any jar of spoiled food  to  prevent
possible  illness  to you, your family,  and  pets.   Before
discarding, detoxify spoiled low-acid food.  Remove the  jar
lid; then place the jar, its contents, and the loose lid  in
hot  water and add enough water to cover the jar.  Boil  all
items  in  the water for 30 minutes.  Cool and  discard  jar
contents  in  garbage or bury in soil.   This  will  prevent
accidental poisoning.                                       

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