title: Development of Babesia ovata in the midgut of the tick, Haemaphysalis longicornis.
abstract: Studies were made on the development of Babesia ovata in the midgut of the nymphal tick vector, Haemaphysalis longicornis. In 12 hr post-repletion, merozoites were observed outside of erythrocytes infected with B. ovata in the contents of the midgut of the tick. After that, these merozoites were transformed into ring-forms which were comparatively large ring 2-3 microns in diameter. Within 48-72 hr post-repletion, ring-form protozoa developed into spherical form 4-5 microns in diameter. Within 3-4 days post-repletion, fission-forms were transformed into fission-bodies 2-3 microns in diameter. Within 4-6 days post-repletion, fission-bodies developed into bizarre-forms 6-7 microns in diameter. At this time, elongated form protozoa which were considered as microgametes, 6-8 microns in length, are also seen. Within 6-8 days post-repletion, round-formed protozoa which were considered as zygotes in 9-10 microns in diameter were observed in the gut. About 10 days after repletion, those round-formed protozoa were transformed into vermicule-formed and round-formed protozoa, 13-15 microns in length, appeared again in the gut epithelial cells.
authors.forename: S
authors.initials: S
authors.lastname: Higuchi
authors.forename: K
authors.initials: K
authors.lastname: Ezura
authors.forename: M
authors.initials: M
authors.lastname: Hamana
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 / Q000469:parasitology*; D001403:Babesia / Q000254:growth & development*; D004912:Erythrocytes / Q000469:parasitology; D007422:Intestines / Q000469:parasitology; D013045:Species Specificity; D013987:Ticks / Q000469:parasitology*; D013997:Time Factors