Medical Dictionary

Koch–Weeks bacillus

noun \-ˈwēks-\

Medical Definition of Koch–Weeks bacillus

  1. :  a bacterium of the genus Haemophilus (H. aegyptius) associated with an infectious form of human conjunctivitis—compare pfeiffer's bacillus

Biographical Note for koch–weeks bacillus



John Elmer

(1853–1949), American ophthalmologist. Weeks founded a clinical laboratory for ophthalmology which came to be known for its outstanding work in bacteriological and pathological studies. His personal accomplishments included the development of a method for using X-rays to locate foreign bodies in the eye, an operation for the surgical reconstruction of the orbit, methods for the surgical treatment of trachoma and glaucoma, and the invention of a new instrument for the extraction of cataracts. In 1886, independently of Robert Koch, he isolated the bacterium, now known as the Koch-Weeks bacillus, which causes an infectious form of conjunctivitis. He confirmed the identification by successfully inoculating one of his own eyes.

Seen and Heard

What made you want to look up Koch–Weeks bacillus? Please tell us where you read or heard it (including the quote, if possible).


feeling or affected by lethargy

Get Word of the Day daily email!