| 释义 |
leptomonad Zool.|lɛpˈtɒmənæd|
[f. lepto- + monad.]
a. = leptomonas a.
b. Any flagellate of the family Trypanosomidæ when existing in an elongated form with a flagellum emerging from the anterior end and arising near a kinetoplast at this end, which form is assumed only in the invertebrate host (and in culture); freq. attrib. or as adj.
1909Jrnl. R. Microsc. Soc. 362 (heading) New leptomonad in muscids. 1931R. R. Kudo Handbk. Protozool. xi. 145 Genus Leishmania Ross... In culture the organism develops into leptomonad forms. 1942D. L. Belding Textbk. Clin. Parasitol. xi. 143 The species of the genus Crithidia occur in the leishmanian, leptomonad and crithidial forms. Ibid., The species of the Phytomonas pass through both leishmanian and leptomonad stages. 1961M. Hynes Med. Bacteriol. (ed. 7) xxviii. 433 In man leishmaniæ appear as ovoid organisms with no flagella, but in insects and in culture they turn into flagellated leptomonads. 1962J. D. Smyth Introd. Animal Parasitol. v. 52 Genus Leptomonas. The leptomonads are exclusively parasites of invertebrates. Ibid. 64 The morphological changes [of leishmanias] within the sandfly gut are simple. In the mid gut they become leptomonad flagellates which multiply rapidly, spreading forwards to enter the oesophagus and pharynx by the fourth or fifth day. When introduced into the mammalian skin by a bite, the flagellates become rounded and assume the leishmanial form. |