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Proceedings of the Helminthological Society of Washington 48(1) 1981

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Proceedings of the Helminthological Society of Washington 48(1) 1981 Volume 48 January 1981 Number 1 PROCEEDINGS -->--;^' V-•... A The Welminthological Society f V "/lew^r'-'^r TV >'''.' 2N"1 £ "/<:V : -'.-''^ -';-' '••?' \'f-:^'?'-r'---'\'^-^J- A sem/onnua/ journal 6f :res&arch^^devofed io He/minfho/ogy and a// branches of Parasifo/ogy , ^--^•- >s. vi^V \ Brqytpn H. RqnsomMemoriarTrast Fund ^v -?-.,••'•• >':•''-'} ,v- '~"; . '""•', /.'/;' ;- .'^y-. '"' T ' Subscription $18.00 a Volume; Foreign, $19iOO if CONTENTS i \ROBERT C.;AND BARBARX/AL WERNER.' Nematospiroides v jlis, ,1926 ,(iSyn. Heligmosomoides polygyrus (Duj.,' 184$ Railliet<et 1909) from/ the Uinta Ground Squirrel, Spermophilusl armatus Keiinicdtt, ,:;, 1863 from.Tetpn National Park, Wyoming •:..—.....,j..^:.^.,...^.^..L.^i..._: ,13 BROOKS, DANIEL R.^ MQNTE X; .MA^ 9C^3^9^4^^^^oii80N~ Systematic "'/Review of Ge.stodes.^ infecting Freshwater Stingrays ((ChondrichthyesiiPoYamo- j / ^trygcinidae) Including Four New Species from Venezuela . ____ i.— li--— -— — , ____43 BUTTERWORTH, ERIC W AND MARY^EVERLEY-BURTON. Observations on the ]-^;' Prevalence and Intehsity of fapillaria • spp. (Nertiatoda: Trichuroidea) in Wild Carni vora, from Ontario, Canada :.- _____ :— ..... ---i--/-J-»--..Jv----------L v.-u---.^ 24 - CHRISTENSEN, BRUCE M. A Taxonomic Review/ of the. Genus f:1! c ^Digenea: Lecithodendfiidae) with a Description ,of Loxogendides loborchh ; ' ^p. n. from:'Riuna cQtesbeiana ShaW ;in"Western Kentucky --..__L.L_.._j2.:._.C::r. 65 cFiscHTHAL, JACOB H. ATMD ROBERT E( KUNTZ. Additional Records'''o f Digehetic (' , Treniatbdes of Mammals from Taiwan— . ______ j_-_^_"._: _______ ^1 _____ ..^... __ 771 • " ' ."'' J. ' '''' : •':'' '• , f V ' /'-' ' '•' '• -.'' ' ; ' ' .' -- '' ', T'- t " .-'• V ,FRIED,BER^ARD<AND .MARTIN S.'SeHNitR.:, Infectivity of Arhblosoma - , (Trematoda: Brachylaimidae) in the Domestic ^Ghick' ,„. !.„ ..^J^li.^^ :83 . n. (Nematoda: Fjlarioidea) frofrithe : ^ Common GraCkle (Qiiiscalus^quisculdy.ersicohr) St _________ 1^ ____ ;' ___ ,_. ___ ^^_:_X 17- /; ^ x v , (.Continued on BdchCover) , /"" . ' _• , k. '•''•--- •'•^.- .' |vCopyright; © 2011, The Helminthological Society of Washington _ I/ ~ THE HELMINTHOLOGICAL SOCIETY 6f WASHINGTON \THESOClEffi;meets once/a month from October through May for the'presentation^nd discussion of papers ifa.any and all branches of parasitology or related scieiices. All interested persons;are invited to attend. \,5\ /r'-. 5 i-v.'y.- X ~< . " • ;> '.'•'. -Persons /interested in membership in <the HeJ(minthological'Society 'of Washington may obtain ap- plication blanks from the Recording Secretary, Milford N. Lunde, Laboratory of Parasitic Diseases, NIH NIAID, Bldg.^Sj'Bethesda, Maryland 20014. A year's subscription to/the Proceedings is in- cluded iitthe annual dues ($12.00). \ , \' ' N/'V . •'.< ."" V " .-i '••'•\' ^ r/V . OFFICERS OF THE SOCIETY FOR 1981 ;. / -1: President: .NANCY D. PACHECO , J, ^'.;.^. Vice President: LOUIS:S. DIAMOND \ , ' : ; v , !t'v Corresponding Secretary-Treasurer: SHERMAN S. HENDRIX._• Assistant Corresponding Secretary-Treasurer: RAYMOND V."REBOIS - H; ,, > Recording Secretary: -MILFORD N. ^UNDE '•' - \ r ^ ,x< p^^ ^-'^' -: :.,'-" Archivist: fDAVID R. LINCICOME \) , l > \% '^^-^' - Custodian of Back Issues: EDGAR ArfSTECK , / V- X ;^ Y Librarian: --PATRICIA A. PILITT r^.\- X^ X'.7-X Representative to the Washington Academy of Sciences': ROBERT S. ISENSTBIN (1976-; ) , {Representative to the American Society of Parasitologists: HARRY HERLICH (1975- ) 1 'U Executive Committee Members-ai-Large: FRANK'W. DOUYRES, 1981 • X - ^-\ ^---•<•?"•• X ,XX~ ;^.,;' : •'• JEFFREY W.iBIER, 1981 ] _,\^^^;^-^- ; ;•.;•.: ..X'/^'v."^^-/-'.^-"^ :;'%; :.c- THOMAS w. SIMPSON, 1982 ^ '•;•..;• 'i •' ; ^ . Immediate Past President: J.RApH LIGHTEN FEjJS ^( ^ Vv }. XTHE:PROCEEDINGS OF THE^ELMINTHOLOGICAL SOCIETY OF WASHINGTON THE PROCEEDINGS are published^emiannually at ^Lawrence, Kansas^by the'HelmintholOgical Society,of Washington/Papers needino^t be presented at-a meeting to be published in the Proceedings. MANUSGRIPTSshouid:be sent to the EDITOR, A- 'James'Haley, Department 0f Zoology, Uni- versity ;of Maryland, College >Park,\y land 20742. Manuscripts must be typewritten, double spaced, and in finished form. The original andVtwp copies are/retjuired. Photocopies of figures and drawings \rnay be submitted for^review purposes; originals will be requested 'after acfeejitance of the manuscript. Papers are accepted with the Understanding that'they i will be published only in the Proceedings. /REPRINTS! may be ordered from the PRINTER at the same timenhe^correetfed proof is returned ,BAGK VOLUMES Of the Proceedings are available. Inquiries concerning back volumes and current subscriptions shouldjbe directed to: Helminthological Society of Washington, c/o Allen Press, Inc., 1041 New Hampshire St.,.Lawrence, Kansas 66044, JJ,S.A. ;, r ; X BUSINESS OFFICE. The Society's business office is at fLawrence, Kansas. All inquiries con^ Deeming subscriptions or'back issues and all payments for dues, subscriptions, and back issues .should be addressed to: Helminthologiical Society of Washington, c/o Allen Pfess.^Inc., 1041 New Hampshire St., Lawrence, Kansas 66044, U.S.A. v ' - ^EDITORIAL BOARD 1 A. JAMES HALEY,;Editor -,498! |// j;r v • mi ^ ' AZ "WILLIAMC. CAMPBELL RAYMOND Mr DANIEL R. BROOKS ; JOHN C. HOLMES GERALD W. ESCH >OHN L. CRITES v :x T. xx KALPH J. LICHTENFELS DONALD FAYER\ ;, GILBERT F. OTTO J JOHN S. MACKIEWICZ DONALD J. FORRESTER ROBIN M.XDYERSTREET MARIETTA OGE NORMAN D. LEVINE HARLEY G.'SHEFFIELD •/ 'N"v v Copyright © 2011, The Helminthological Society of Washington Proc. Helminthol. Soc. Wash. 48(1), 1981, pp. 1-7 Differentiation of Late Fourth and Early Fifth Stages of Ascaris suum Goeze, 1782 (Nematoda: Ascaridoidea) in Swine P. A. PlLITT, J. R. LlCHTENFELS, F. G. TROMBA, AND P. A. MADDEN Animal Parasitology Institute, U.S. Department of Agriculture, Science and Education Administration, Agricultural Research, Beltsville, Maryland 20705 ABSTRACT: The morphology of late fourth and early fifth stages of Ascaris suum in swine was studied with light and scanning electron microscopy. Late fourth-stage larvae have dome-shaped lips, that are broadest at the base and incompletely separated laterally. The lips bear coarse, triangular denti- cles, irregularly spaced on the internomedial and internolateral walls. Large double papillae are lo- cated on the middle of the external lip surface. The cervical region gradually increases in width posteriorly. The late fourth-stage cuticle is marked by a coarse transverse striation and bears incom- plete longitudinal ridges, creating a brickwork pattern; longitudinal alae are present. Late fourth and early fifth stages have overlapping body lengths; late fourth-stage larvae at 21-24 DAI range from 13 to 27 mm long, and early fifth stages at 23-24 DAI range from 22 to 36 mm long. Early fifth-stage lips are truncate, broadest at the level of the prominent double papillae, constricted at the base and widely separated laterally. The lips bear a single row of fine, regularly spaced denticles on the internal margins. The prominent double papillae are located slightly anterior to the middle of the external lip surface. The cervical region sharply increases in width giving a shouldered appearance. The cuticle of early fifth stages is finely striated without markings; longitudinal alae are absent. Reliable anatomical characters and morphometrics for the late developmental stages of Ascaris suum are still lacking although the species has been studied by many investigators. Douvres et al. (1969) described the life cycle and the early development of A. suum in swine from the ingested infective egg through early fourth-stage larvae. The present report describes the structure of late fourth and early fifth stages of A. suum in swine. Materials and Methods Purebred Hampshire swine from the closed breeding herd maintained at this institute were inoculated with a single oral dose of 500 A. suum eggs. The dose level of 500 eggs was selected for reasons explained by Tromba (1978). The swine had been farrowed and maintained under conditions precluding previous exposure to A. suum. Procedures for preparation of inocula and necropsy were those reported by Douvres et al. (1969) and Madden and Tromba (1976). Ascaris suum in late fourth stage (includes larvae closely enveloped in a sheath), fourth ecdysis, and early fifth stage were recovered from washings of the small intestine. The nematodes were killed and fixed in Bles1 fixative (Meyer and Olsen, 1971), cleared for study in phenol-alcohol, and studied in temporary wet mounts. Photomicro- graphs were taken with a 35-mm camera, mounted on a microscope equipped with an interference contrast attachment. Scanning electron micrographs were prepared according to the methods of Madden and Tromba (1976). Morphological terminology follows Chit wood and Chit wood (1950). Nematodes have been de- posited in the U.S. National Parasite Collection as USDA Parasite Collection Nos. 68501, 68518, and 68519 for specimens collected 21, 23, and 24 days after inoculation (DAI), respectively. Copyright © 2011, The Helminthological Society of Washington 2 • PROCEEDINGS OF THE HELMINTHOLOGICAL SOCIETY Table 1. Comparison of characters useful in differentiating late fourth and early fifth stages of Ascaris suum. Characters Late fourth stages Early fifth stages Lips Dome-shaped Truncate Broadest at base Broadest at level of double Incompletely separated laterally papillae, lip base narrow External surface rounded Widely separated laterally
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