title: The fine structure of granules in eosinophil leucocytes from aquatic and terrestrial birds.
abstract: The ultrastructure of eosinophil granules from various aquatic and terrestrial birds has been described. Granules of three basic types were found. The first had a crystalline internum and was found only in the order Anseriformes, which included the black-necked screamer, ducks, geese and swans. The crystals occurred in three morphological forms. The second and least common granule examined contained a non-crystalline internum which was either homogeneous or composed of microfilaments or microtubules. The largest and most common group of birds had a homogenous granule with no internum shown. Homogeneous granules occurred less frequently than did those with interna.
mesh_terms: D000818:Animals; D001717:Birds / Q000097:blood*; D010856:Columbidae / Q000097:blood; D003370:Coturnix / Q000097:blood; D003460:Crystallization; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D003599:Cytoskeleton / Q000648:ultrastructure; D004372:Ducks / Q000097:blood; D004804:Eosinophils / Q000648:ultrastructure*; D005777:Geese / Q000097:blood; D008870:Microtubules / Q000648:ultrastructure; D011200:Poultry / Q000097:blood*; D014422:Turkeys / Q000097:blood