Adelchi Negri (16 July 1876[1] – 19 February 1912) was an Italian pathologist and microbiologist born in Perugia.
Negri performed extensive research in the fields of histology, hematology, cytology, protozoology and hygiene.
A few months later, Paul Remlinger (1871–1964) at the Constantinople Imperial Bacteriology Institute correctly demonstrated that the aetiological agent of rabies was not a protozoan, but a filterable virus.
In 1906 he married his colleague Lina Luzzani and six years later, at the age of thirty-five, died of tuberculosis.
Negri was buried in the Monumental Cemetery of Pavia (Viale San Giovannino), along the central lane, on the left, near the tombs of other two important medical scientists, the anatomist Bartolomeo Panizza and his teacher, the Nobel Prize–winning Camillo Golgi.