Abstract
The fine structure ofSetaria digitata based on histological assessment is described. The cuticle is thick and multilayered. The well developed longitudinal muscles consists of fibrillar zone only and cover about 65–70% of the circumferences throughout its body, the rest being occupied by the very voluminous lateral hypodermal chords. The digestive system is well developed and the intestine possesses a narrow simple tube consisting of a single layer of epithelial cells. The paired genital tubes run through almost the entire length of the body until the two uteri unite to form a short unpaired vagina. Morphologically distinct spermatheca is absent, but posterior part of uterus serves the function. Gradation of developmental stages—fertilized egg to microfilariae—occur from posterior to anterior part of uterus. The developing embryos are interconnected and also connected to the uterine wall. This condition commences from early embryogenesis and exists up to hatching stage. Probable function of these connections in the synchronised development of embryos and as ‘nutritive channels’ for the supply of nutrients has been discussed.
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References
Anderson R C 1960 A Study ofFilaria martis Gmelin, 1979 fromMartis foina andFedetis coffer;Can. J. Zool. 38 157–167
Balinsky 1976An Introduction to embryology (Philadelphia, London: WB Saunders and Co.)
Bartlett C M and Anderson R C 1985 On the filaroid nematodes (Spiendidofilaria spp) from pulmonary arteries of birds;Can. J. Zool. 83 2373
Bird A F 1971The structure of nematodes (New York: Academic Press)
Bird A F and Bird J 1969 Echinodermata, Nematoda and Acathocephala;Chem. Zool. 3 253–288
Boulenger C L 1921 On some filaroid parasites of cattle and other ruminants;Parasitology 12 344–349
Buttner D W, Albiez E J, von Essen J and Erichsen J 1988 Histological examination of adultOnchocerca volvulus and comparison with the collagenase technique;Trop. Med. Parasitol.39 390–417
Chitwood B C and Chitwood M B 1950An introduction to nematology (Baltimore, Maryland: Monumental printing Co.)
Hirchmann H 1971 Comparative morphology and anatomy: inPlant parasitic nematodes (eds) B M Zuckerman, W F Mai and R A Rhode (New York: Academic Press) vol. 1, pp. 51–58
Hyashi N 1959 Studies onLitomosoides carinii (Nematoda) III. On the secretion and excretion systems of adult;Acta Sch. Med. Gifu. 7 175–190
Kagei N 1960a Morphological studies on thread worm, Filarioidea. Report 1. Morphological structure ofSetaria cervi;Acta Med. Univ. Kagoshima 2 142–149
Kagei N 1960b Morphological studies on thread worm, Filarioidea. Report 2. On the microstructure of body wall and uterus of adultSetaria cervi;Acta Med. Univ. Kagoshima 2 150–157
Kagei N 1963 Morphological studies on thread worm, Filarioidea. Report 5. On the microstructure of male ofLitomosoides carinii (Travassos, 1919), Filaria of cotton rat;Acta Med. Univ. Kagoshima 5 43–53
Lee D L 1972 The structure of the helminth cuticle;Adv. Parasitol. 10 347–379
Maplestone 1931 Parasitic nematodes obtained from animals dying in the Calcutta Zoological gardens. Parts 4–8;Rec. Indian Mus. 33 71–171
Pearse A G E 1968Histochemistry—Theoretical and applied (London: J and A Churchill Ltd.)
Raillet A and Henry A 1911 Sur une Filaire Peritoneale des Porcins;Bull. Soc. Pathol. Exot.4 386–389
Schulz-key H 1988 The collagenase technique: how to isolate and examine adultO. volvulus for the evaluation of drug effects;Trop. Med. Parasitol. 39 423–440
Sheng Y L 1958 The differentiation ofSetaria cervi andSetaria digitata, the two species commonly found in ruminants in Asia (Demonstration);Trans. R. Soc. Trop. Med. Hyg. 52 11
Sheng Y L 1959 A revision of the Nematode genusSetaria Viborg, 1795, its host-parasitic relationship, speciation and evolution;J. Helminthol. 33 1–98
Striebel H P 1988 Proposed form to evaluate some histological aspects of macrofilarial morphology, its age dependent alterations and drug related changes in nodules ofOnchocerca volvulus andO. gihsoni;Trop. Med. Parasitol. 39 367–389
Thwaite J W 1927 The genusSetaria;Ann. Trop. Med. Parasitol. 21 427–466
Triantophyllou A C and Hirchmann H 1966 Gametogenesis and reproduction in the wheat nematode,Anguina tritici;Nematologica 12 437–442
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Decruse, S.W., Raj, R.K. Histological studies on femaleSetaria digitata (von Linstow 1906), a filaria of bovine,Bos indicus . Proc Ani Sci 99, 103–112 (1990). https://doi.org/10.1007/BF03186378
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DOI: https://doi.org/10.1007/BF03186378