Haemophilus influenzae biogroup aegyptius

Haemophilus influenzae biogroup aegyptius (Hae) is a causative agent of acute and often purulent conjunctivitis, more commonly known as pink eye. It was discovered independently by Koch and Weeks in the 1880s.

During the mid-1980s to early 1990s, a highly virulent clonal group of Haemophilus aegyptius, localized in and around the São Paulo State of Brazil, was found to be responsible for Brazilian purpuric fever, an acute septicemic fulminant illness affecting children.