This report describes the presence of type 1 fimbriae on Shigella boydii 5
which agglutinate guinea pig erythrocytes and feature mannose-sensitive adh
erence. Morphologically; the fimbriae were thin, rigid cylinders 2-5 mu m i
n length and 3-5 nm in diameter, and the organella retained axial holes, Th
is is the first study to have revealed the existence of type 1 fimbriae on
S. boydii.