Germ Theory Calendar

Date	1680
Author	Leeuwenhoek
Contribution	Observed and recorded what were probably parasitic protozoa, in gut of horse-fly.
Reference	Foster
Notes	Letter (in Dutch) of 12 November, 1680; published in part, in English, in 1681; see Dobell, 1932. The organisms were probably trypanosomes in a vector tabanid fly. This appears to be the first record of a parasitic protozoon.
Category	Microscopy
Pathogen Class	Protozoa

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