PROCEEDINGS of the HELMINTHOLOGICAL SOCIETY of the Esophagus and in the Number and Esophagus Can Have Either the Structure De- Arrangement of Male Supplements

PROCEEDINGS of the HELMINTHOLOGICAL SOCIETY of the Esophagus and in the Number and Esophagus Can Have Either the Structure De- Arrangement of Male Supplements

Volume 38 January \1971 •"'•Number;;!. • •,'-- ....'....• , . ..- X! - '. '•-. ^ -••',-- ' -,- '-, -;., '»•• •• ^ • Th'' e ' Helminthoilogica' ' l Society ''''.semiannual /oi/i^ia/ q research ele^ofetf^ to Helmirithology and-all branch&s^of ^Paraisifd/oigy jin part by the: ' ferayJan H. Ransom Memorial T^ust F^ncl Subscription '$9>OD a' ; JFpreigrC $9^0 v r 'Vv V -'•'';v; "r.:'- CONTENTS ;';V";; '';-' '•'.•;-'' ( - "" |f> ;:- -v>"x :-, ; -/•/ v:-';v. -/:^':, ;'';/"7,-'. ' . -, • '5v' '!'! -1V.;,' ;'>'-; v( r' \ BECKER, C, DALE, Cestrahelmins rivularis sp. n. (Digenear'perbpristiidae) ^ : ifrpm White Sturgeon, -Acipenser transmonidnus, in the Golurnbia Riv^r,, / Washington „—-.__„-— -_l-^_ -— .^i— —_ ...L-^— llu-,._-.;..^-j—J:L:_^.>uV:: j_-" '?, '23 BRPGE, J. I., ^M. D. RIJFF, J. E. WP^LIAMS, P. TORTI, AND G. SIKKEMA. Corn- v pa/ative Respiration of the Life Cycle Stages of Paragbhimus ohirai, MiyA- ' : ; :. ^ tyki, I939'.,-^-..-.;^-.— !„-_,— .„....-....._„.._: ____ ^...l^-^i...^.-..^-;:.^':' 56. BUSCHER, ^ HENRY N., AND A. JAMES HALEY. Intestinal .Hehninths of Rott«^ ro««^ from Urban and Rural Areas ,in the Punjab Region of West Pakistan 96 CHRISTIAN, 'FREDERICK A. Pseudoscmsiiiotrema ' ccrtesbeianae sp^ n. ( trema- toda: Pleurogenidae), from tiie Bullfrog, Rano catesbeianft Shaw „— l..^_x 37^ , H,, AJ^XH.^C.'McCA^^BEijL.,, An^h6lrijintic ,-;Ef f icacy of >our ;I)ofce .; '/ Levels of Carnbendazole in Cattle.-.: — ._^_^- .r_.^..:_..^ __ h--l _J.;^-l- -~- . ;40 n^LiAM, R.,' DATUS M. HAMMOND, AND MERTHYR , L. MINER. : ~~A:m-> • < - jiroliurn Treatrhent <of Six- fto Twelverrnprith-old Calves Experirrientally C " Infecte.d with Coecidia.. _,..ii__. „. _____ :-l;'.L^-r:.-: . ; .(•,_/'_ ____ i_LL...L-__ —^.-^.-'J- '!-''''! 17 i I. L., M. L. COLOLAZIER,' M. L. CRANDAtiL, AND iR. L. WlLSON. Effect c ^ of. Management -Systems on, the Growth :of iliambs and Development of / ' Internal Pafasitism. V. Field Trials Comparing Early Weaning Versus iate , Weaning and Involving Medication >wjth "-Thjiabend'a^ole and Purified Mif7 ' cronized Phenothiazine ,-— _________ — - _iC/;_i;_j — „_ '--.^ ____ .„ .::.:.. ______ .:._ '/_^.— _.:•- 27 ' ^ v v; '-'.'; •-'. '...'• (Continued on T$ack Cover) , ' 'ji 7 ;'i Copyright © 2011, The Helminthological Society of Washington 1 THE eMELMINTHOLOGICAl. SOCIETY OF WASHINGTONr "//v ••-.„;. :^ ,' -• ' •' . '• • , <- . ' .,' • '.,-•• •• '•'• • J /" ' ''• v • 'f •"••'•• • , •'-,.-•' •'.:•' -; ;/pv • /.- -.' '' •/ ':i ':ii.. s ; '.'•'-,• ••"• ' - . ' x, I. ' '' ' •'' '--"•' - ••- '• '••/'.- - •• _„_ '.-•::• ,.- - ,"'•- . ', - 7 -TH^fe SOCIETY meets once a month from October through May for -the presentation and discussiori, of papers irl any 'and att Branches t>f parasitolbgy or felated/ sciences.^ All interested , persons are invited to attend.. •<• ^ '-•, .;;-v ' *C ••',vi-7,'.^;^c'- ,J;;':/'* '/")^- ;•! '"r~; '• . "'''''• ' Person's vinfer6steid in membership in the ilelminthplogic^| Society of Washington niay obtam ^application blanks frorrfthe Cbrresponding Secretary-Treasurer, , Miss Edna Jvl. Buhrer, Nafaonalr Aniinai Parasit6 Laboratory; /Agricultural' Research Service, Beltsvjlle, Maryland 207Q5.' A year's subscnptton to tiie Pibeeedings ,is included in ^ the annual dues, ($8.00). "t / -r>-^ ^. OF THE President:' E. J.;L. 'SbXlLSBY '.,~''~-:' ''.U'" '-|;V:"..;:;::'Lfv.;U:.;k, V;V.. ;^ce President: "FRANK W, DOUVRES '•: y, N^ -: _ , • ' .V^^;-.v.-;';,'-V; ^ '-^; •^ Corresponding Secretary-Treasurer: EDNA M.:BUHRER / •?'-. 'y- , '" •/ v ->:r / Asso^ae Tteaswer: LLOYD E. ROZEB.O0M Ov:v' ' ^ ,>'" ^^^'S^^-^ Asswfcn* Corresponding Secretary-Theastirefr HALSEY H. VEGORS ' . " V!- Reporting Secretary: ' THOMAS k. SAWYER^ f. ,.( ';K -^ •"• ; -r ''•';:' :','•; •.-•"•>.;. Librarian^ JUDITH M.f HUMPHREY (1962- fl ''• .", > CM V '> 7;i- "^ ^' ,'Aroferoirti - JUDITH M;, HUMPHREY {1970- '•, l£'*t*£M '"• ^'~ "''^'',^ -,f Representative to the, W&riington ..'Academy -of Sciences: AUREL O. FOSTER ,(1065- Representfltive to the American Society of Parasitologists: - : r ;, ';\5 ~ W: LUTTERMOSER (196^- ; )v '= $$:>' "ov^M «". .''?';'--->' ;KEND ALL. G., POWERS, 1972 GILBERT F^OTTO.,. 1971v-/ • ••ROBERT,- M. KOCAN,V1971 /; . , . : ., .., . THE^PROCEEDINGS OF THE HELMINTHOLOGICAt SOCIETY OF WASHINGTON S. THE PiROCEEDlNGS are published- serniannually/ at Lawrence, Kansas by the Helrnintbp^ fogicals Society of Washington. '.Papers need not be. presented at -a meeting to be ^pubh'she<i in the Proceedings. However, non-members /may pubhsh'in the Proceedings only if they coritribyte ^ the-full cost of publication. :' ,;,',, /, ^ / "'. ' ; ;'/ ; , ,c - x : MANUSGRIPTS should be sent' to the EDITOR, HkrleybV Sheffield; Laboratory of ^Parasitic - • Diseases j "Building -i5, Room, 112, National Institutes of Health, Bethesda, Maryland 20014. Manuscripts must.be typewritten, double spaced, arid in finished form. T,he bniginal and one cppy are : required. ^Photocopies of figures and drawings may be submitted ; for review. purposes; * ;ojiginals will be requested after acceptance of the, manuscript.-- Papers are accepted with 'the wm ^understanding that ^^ they will be ^published only in the Proceedings. ' ^ :' v J C" .\ may be ordered -from /the PRINTER at the same time trie corrected proof r >.'•/ ' _•-• -• <•!$ !?";NT 5 ,,,'v-v:/ -jl -iC'!l ' ''V,'/.-'; BACK VOLUMES of the Proceedings are" available. Inquiries concerning /back volumes '^d current subscriptions should be directed to: Helmintliolbgical ;Soeiejty of Washington, ;e/o Alleri Press, Ind., 1041 New Hampshire, St., .Lawrence, Kansas 66044, U.S.A. <£$. '^ BUSINESS OFFICE. The Society's business office is at Lawrerice, Kansas. AU,jriquiries eoncerriing subscriptions orvbadk issues and all payments for dues, subscriptions, dnd back issues should be addressed to: vHehriinthologieal Society ,of Washington, c/c ^ Allen Press, Inc., :1041, New Hampshire St., Lawreriqe, Kansas 66044, -TJvS.A. ; , , :>-/;• .5 ^ J '•• '•• & ^V ; /" : . -rv1/;/ -^ k ', '^': ,; . G- ^'SHEFFIELD, -Editor-1 '. *--Mr> ^y^/---- i? ; MAY BELLE CHITWOOD WILLIAM E: NICKLE ^>''. ll -;- v,r; i'V 1;/;-•;'. JACOB He .FISCHTHAI/, :.' GILBERT F. OTTO •'•\fi' V^'/"' V' ,. •.V^'-.Y;^'^ GLENN -L. HOFFMAN'-- > \• ^ ''';// "ARMEN C./TARAN ^•'J->^^^: ;t:OREN,R. KRUSBERG ; , > V/"' ^ 7*X: IOHN ' ' '->:l-.v :'-W.-'-'. .' JOHN T. LUCKER • '' v-> WEINSTEIN: JOHN S. MACKIEWICZ _ f ( ,K-C? Copyright © 2011, The Helminthological Society of Washington VOLUME 38 JANUARY 1971 NUMBER 1 The Ultrastructure of Developing Metacercarial Cysts of Ascocotyle leighi Burton, 1956 (Heterophyidae)1 PAUL C. STEiN2 AND RICHARD D. LUMSDEN:! Laboratory of Parasitology, Department of Biology, Tnlane University, New Orleans, Louisiana ABSTRACT: Electron microscopy of encysting A. leighi metacercariae in the btdbus arteriosus of Poecilia (= Mollienesia) latipinna (LeSeuer) indicates that the material composing the cyst wall is of parasite origin. The bulbus tissue bordering the cysts includes endothelial cells, fibroblasts and a diffuse mesh- work of reticular collagen fibers. Immediately following the penetration of the btilbtiv endothelium by the parasite, a thin primary lamella condenses around the cere-aria. Additional matrix material is then added to the inner surface as granular secretions from the metacercarial tegument. A moderate fibrosis of the surrounding host tissue is evidenced by some infiltration of fibroblasts and increased density of retic- ular collagen, though this collagen does not form an integral component of the cyst wall. In heavy infec- tions, the metacercarial cysts severely occlude the primary lumenal space of the bulbiix. In such cases, there is some recanali/ation of the endothelium, providing secondary channels for blood flow. No cyto- logical indication of an inflammatory or immune response was apparent at any time during the encyst- ment process. Dixon and Mercer (1967) described the tissues, respectively, of their second interme- ultrastructure of the metacercarial cyst wall diate hosts have suggested that the metacer- of Fasciola hepatica at various stages in its cariae become enveloped by host fibroblasts development. The cyst structure of this free which contribute a layer of collagen around the encysting trematode species differs significantly periphery of an inner cyst wall, probably of from that of many forms which encyst within parasite origin (Sogandares-Bernal and Lums- the tissues of an intermediate host. As recog- den, 1963, 1964). Variation in cyst wall struc- nized by Hughes (1928), Macy (1934), Hunter ture of otherwise seemingly identical Asco- and Dalton (1939), Bogitsh (1962), and others, cotyle metacercariae has been interpreted as such cysts may be formed from material con- reflecting differences in magnitude of the host tributed by both the host and parasite or fibrocytic response (Sogandares-Bernal and composed entirely of host connective tissue. Lumsden, 1964). In a subsequent electron Metacercariae of the Ascocotyle complex of microscopic investigation of the cyst wall of species commonly utilize brackish water fishes A. chandleri, a species encysting in the liver as second intermediate hosts. Specificity of the of cyprinodontid fishes, Lumsden (1968) found parasites for a particular organ is marked, and no collagen incorporated within the structure the encysted worms are invariably located in of the metacercarial cyst wall, though collagen close proximity to the circulatory system. Pho- fibers were sometimes present in the adjacent tomicroscopic studies on the encystmcnt of A. host tissues.

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