Dead rats examined for lesions of plague in the United States.
United States USA Date:1932 Duration:3 min 0 sec Sound:NO SOUND
A study of rats and diseases harbored by rats. Scientists and technicians in a laboratory comb rats for lice, mites and fleas. They mount and suspend the rats over a bowl and comb them. The insects collected in the bowl looked at through a microscope lens. Fleas, mites and lice as seen through a lens. A solution dropped on them and transferred to another bowl. Dead rats examined for lesions of plague. Technicians dissect the dead rats with a pair of scissors. A building with a sign that reads 'Fertilizer Company'.
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