| 释义 |
rhabditis|ræbˈdaɪtɪs|
Also Rhabditis.
[mod.L., f. Gr. ῥάβδος rod; coined in Fr. by F. Dujardin in Hist. nat. des Helminthes (1845) 239.]
A nematode worm of the genus so called (family Rhabditidæ), the members of which are found in soil, water, and decaying organic matter and in the larval stage are facultative parasites of mammals.
1876van Beneden's Anim. Parasites (1883) 156 This worm is evidently a Rhabditis. 1884Sedgwick tr. Claus' Text-bk. Zool. I. ix. 350 Numerous generations of the Rhabditis form may succeed one another. 1906P. Falcke tr. Braun's Animal Parasites of Man 276 In the papules [on a boy's skin] the observer found one or more rhabditis. 1967P. A. Meglitsch Invertebr. Zool. viii. 278 (caption) Anatomy of Rhabditis, a typical nematode. 1971A. F. Bird Structure of Nematodes x. 235 Mapes..was unable to detect breakdown of food in the posterior bulb of Rhabditis and concluded that the principal role of the bulb flaps was a valvular rather than a crushing one.
b. Comb., as rhabditis-form, a form (of a nematode worm) characterized by a rhabditiform œsophagus; rhabditis-like a. = rhabditiform a.
1886W. E. Hoyle tr. Leuckart's Parasites of Man 96 Such is the case with..Rhabdonema (Ascaris) nigrovenosum.., whose Rhabditis-form, living in the excrement of frogs, differs very little from the animals related to it. 1897Parker & Haswell Text-bk. Zool. I. vi. 287 The embryos [of the Nematode Ascaris nigrovenosa] pass from the lungs into the enteric canal of the host, are expelled with its fæces, and develop in water into a sexual Nematode, called the Rhabditis-form, in which the sexes are separate. 1906P. Falcke tr. Braun's Animal Parasites of Man 276 It must have belonged to the rhabditis-like larva of a Nematode.
Hence rhabˈditic, rhabˈditiform (also rhabdiform) adjs., characteristic of, or of the form of, Rhabditis; also spec. having or being a short, thick œsophagus with a bulb at the proximal end and another medially, as in the free-living, non-parasitic larval stages of certain nematodes.
1890Cent. Dict., Rhabditic. 1897Allbutt's Syst. Med. II. 1040 Development proceeds under certain circumstances so rapidly that in one to two days a rhabditiform embryo..is born. Ibid. 1088 The various species are heterogamous, each species including a free, bisexual, and rhabditic form. 1924Jrnl. Helminthol. II. 58 The latter [sc. the œsophagus of Rhabdias fuscovenosa] has completely lost its rhabditiform shape and is now very narrow for the greater part of its length. 1951L. H. Hyman Invertebrates III. xiii. 304 The developing eggs pass into the host's buccal cavity and thence are swallowed into the digestive tract where they hatch into rhabdiform young, so called because of the rhabditoid form of their pharynx. 1969A. M. Dunn Vet. Helminthol. i. 10/2 The oesophagus [in Nematoda]..differs in form according to the higher taxon to which the worm belongs... It may be filariform..; rhabditiform, with anterior and posterior swellings, in many free-living and plant-parasitic adult nematodes and..in the free pre⁓infective stages of the strongylates; bulb-shaped, [etc.]. 1973T. C. Cheng Gen. Parasitol. xvii. 607/1 After molting, rhabditiform larvae become filariform larvae. |