title: Development of Babesia gibsoni in the midgut of the nymphal stage of the tick, Rhipicephalus sanguineus.
abstract: Studies were made on the development of Babesia gibsoni in the midgut of the nymphal stage of the tick, Rhipicephalus sanguineus. Six hr after repletion, merozoites of B. gibsoni, free of erythrocytes, were observed in the midgut contents of the ticks. After that, within 24 hr, those merozoites were transformed into ring-forms which were relatively large ring 1-2 microns in diameter. Later, the ring forms developed into spherical forms which were somewhat elliptical in shape and 3-4 microns in diameter. Within 2-4 days, bizarre forms (5-6 microns in diameter) developed into elongated forms (5-6 microns in length). About 5-6 days after repletion, large round or elliptic zygotes (7-9 microns in diameter) were observed in the ticks gut.
authors.affiliation: Department of Internal Medicine, School of Veterinary Medicine and Animal Sciences, Kitasato University, Aomori, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Higuchi
authors.forename: H
authors.initials: H
authors.lastname: Kuroda
authors.forename: H
authors.initials: H
authors.lastname: Hoshi
authors.forename: S
authors.initials: S
authors.lastname: Kawamura
authors.forename: Y
authors.initials: Y
authors.lastname: Yasuda
mesh_terms: D000818:Animals; D001096:Arachnid Vectors; D001403:Babesia / Q000254:growth & development*; D004064:Digestive System / Q000469:parasitology; D009758:Nymph / Q000469:parasitology*; D013045:Species Specificity; D013987:Ticks / Q000469:parasitology*