Life Sciences Commons^™

Cinemicrography Of Selected Parasites Of Fishes And Of Free-Living Stages Of Haemonchus Contortus, Stephen Homer Hilton

Theses and Dissertations

Two 16 mm color films were made to help fill a general need for instructional motion pictures in the area of Parasitology. One film "Haemonchus contortus, a Sheep Stomach Worm," deals with a nematode parasite of sheep, showing all stages of its external development and including a time-lapse sequence of the embryonation of the egg. The other film, "Some Parasites of Freshwater Fishes," shows six parasites; Ichthyophthirius multifiliis, Cotylurus erraticus, Dactylogyrus sp., Lernaea cyprinacea, Trichodina sp., and Diplostomum spathaceum for the first time in motion pictures. The films were photographed through a Wild dissecting scope and a Reichert Universal Camera …

A Possible Function Of The Fibrillar Coat In Acanthocephalus Jacksoni Eggs, David F. Oetinger, Brent B. Nickol

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Discusses a possible function of the fibrillar coat in Acanthocephalus jacksoni eggs.

Cetacean Notes. I. Sei And Rorqual Whales On The Mississippi Coast, A Correction. Ii. A Dwarf Sperm Whale In Mississippi Sound And Its Helminth Parasites, Gordon Gunter, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

I. Gunter and Christmas (1973) described the events leading to the stranding of a baleen whale on Ship Island, Mississippi, in 1968, giving the species as Balaenopteru physalus, the Rorqual. Unfortunately the identification was in error, but fortunately good photographs were shown. The underside of the tail was a splotched white, but there was no black margin. The specimen also had fewer throat and belly grooves than the Rorqual, as a comparison with True’s (1904) photograph shows. Dr. James Mead (in litt.) pointed out that the animal was a Sei Whale, Balaenoptera borealis. This remains a …

An Estuarine Low Temperature Fish Kill In Mississippi, With Remarks On Restricted Necropsies, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

In January 1973, large numbers of Mugil cephalus (striped mullet), weighing approximately 250 gm each, died in two freshwater localities in tidewater bayous of Jackson County, Mississippi. Fish identified as Mugil curema, M. cephalus, Megalops atlantica, Dormitator maculatus, and Fundulus grandis were found dead in other low saline estuarine areas. Fish-kills during cold periods are less commonly encountered in Mississippi than in Texas or Florida. This particular incident is attributed to conditions of stress for fishes incompletely acclimated to the encountered low temperatures. The most deleterious stress was the low saline water which probably allowed a breakdown in the …

Review Of Suomen Nisäkkäät [Mammals Of Finland] By L. Siivonen (Otava Publishing Company, 1972), Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Review of Suomen Nisäkkäät [Mammals of Finland] by L. Siivonen (Otava Publishing Company, 1972).

Helminths Of Three Species Of Goby (Pisces: Gobiidae) From Mission Bay, San Diego, Daniel R. Brooks, Edward B. Brothers

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

From August 1971 to June 1973, 351 gobies representing three species, Ilypnus gilberti (Eigenmann and Eigenmann), Clevelandia ios (Jordan and Gilbert), and Quietula y-cauda (Jenkins and Evermann), were collected by Brooks from Mission Bay, San Diego, California, and examined for helminths. The worms were removed from the organs to saline solution, fixed in 40% isopropyl alcohol or warm AFA, and stored in 70% ethanol. All platyhelminths were stained in Mayer's hematoxylin and mounted in Canada balsam. Nematodes were cleared in glycerine and mounted in glycerine gel. Representative mounts are on deposit with the H. W. Manter Laboratory, Division of Parasitology, …

Differentiation Of Microsporidian Spore-Tails In Inodosporus Spraguei Gen. Et Sp. N., Robin M. Overstreet, Earl Weidner

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

The new genus Inodosporus was erected to accept I. spraguei, a new species having eight sporoblasts per pansporoblast with each subsequent spore possessing three or four basal spore-tails and one branched apical one. It is primarily by the apical tail that the species is separated from the only other recognized species, I. octospora (Henneguy, 1892) comb. n., formerly Thelohania octospora.

Spore-tails of I. spraguei are membranous channels which originate within differentiating pansporoblasts during genesis of sporonts into sporoblasts. During the switch from vegetative to spore-forming development, cytoplasmic constituents of I. spraguei segregate into two distinctive domains for which …

On Some Anoplocephaline Cestodes From Pikas, Ochotona Spp. (Lagomorpha), In Nepal, With The Description Of Ectopocephalium Abei Gen. Et Sp. N., Robert L. Rausch, Masashi Ohbayashi

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Three species of anoplocephaline cestodes, Anoplocephalinae gen. et sp. indet., Schizorchis cf. altaica Gvozdev, 1951, and Ectopocephalium abei gen. et sp. n., are reported from pikas, Ochotona roylei (Ogilby) and O. macrotis (Giinther), from central Nepal. The taxonomic status of Schizorchis esarsi Lovekar et al., 1972, and of Schizorchodes dipodomi Bienek and Grundmann, 1972, is discussed, with the conclusion that both species belong in the subfamily Linstowiinae, near the genus Atriotaenia Sandground, 1926. Ectopocephalium gen. n. is distinguished from other genera in the subfamily Anoplocephalinae by the modified anterior portion of the strobila, which is embedded in the tissue of …

Concurrent Infections Of Trypanosoma Equiperdum And Trichinella Spiralis In Mice, Pauline A. Nembhard

Loma Linda University Electronic Theses, Dissertations & Projects

In concurrent infections of Trichinella spiralis and Trypanosoma equiperdum, the survival times vary in the early stages of the Trichinella infection. On Days 1 and 4, the mean survival times are significantly increased, and on Days 3 and 7 they are markedly decreased. This decrease is probably due to intestinal tissue invasion. Mice infected with trypanosomes after the 7th day of the Trichinella infection have survival time increases to a significant point and a steady leveling off to Day 21. It is suggested that the antibodies produced against the Trichinella worms slow down multiplication of trypanosomes and increase the …

Herpetomonas Megaseliae: Architectural Rearrangements During Amastigote Formation, John J. Janovy Jr., P. M. Daggett, K. W. Lee

John Janovy Publications

The ultrastructure of Herpetomonas megaseliae Daggett, Dollahon, and Janovy, 1972, culture forms has been described in detail by Janovy et aI. (1974, J. Prot. 21: 53-59). Pellicular microtubules were described in pro- and opisthomastigotes as parallel to the longitudinal axis of the body and to the axis of the flagellar pocket. Microtubules lay in an electron translucent zone directly beneath the limiting membrane, and the flagellar pocket opened at the anterior end.

Unpublished studies in this laboratory have indicated that Herpetomonas megaseliae and a number of other "lower" trypanosomatid parasites are capable of transforming into amastigotelike forms upon phagocytosis by …

The Effects Of Temperature On The Oocysts Of Isospora Canis, Ray Loveless

Theses and Dissertations

Oocysts of Isospora canis, an important protozoan parasite of dogs, must sporulate in the external environment in order to become infective. To determine the tolerance of these oocysts to different temperatures, oocysts ware collected from freshly passed feces, cleaned, and subsequently stored in unsporulated, partially sporulated, and completely sporulated conditions at temperatures ranging from +50 C to -50 C. Observations on survival for each group were determined periodically thereafter at intervals up to 64 days. The rate of sporulation was followed at 6 hr intervals for temperatures of 20, 25, 30, and 38 C. Completely sporulated oocysts ware more resistant …

The Great Potato Debate, James D. Hudson

Honors Theses

Anencephaly and spina bifida cystica are two of the most common severe congenital malformations consistently observed in human populations. Both represent defects in the neural tube and share a significant number of similar epidemiological associations among them, occupational class, geography, sex ratio, maternal age, year and season of the year. In anencephaly most of the brain and upper skull never form usually resulting in death within a few hours of birth. Spina bifida cystica is a malformation of the spinal cord often causing paralysis, vulnerability to infection, and early death. In 1972, Dr. J.H. Renwick presented a controversial hypothesis which …

The Chromosomal Complement Of The Yellow-Cheeked Vole, Virginia R. Rausch, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

The karyotype of Microtus xanthognathus (Leach) is described, based on material from one female and one male vole. The diploid chromosomal number was found to be 54, and the fundamental number 62. The metacentric X-chromosome was of medium size and averaged 6.6% of the haploid complement. The designated Y-chromosome was near acrocentric. The specific distinction of M. xanthognathus and Microtus chrotorrhinus (Miller) was confirmed by the recognition of major differences in karyotype and differences in fundamental number. The distributional history of M. xanthognathus is briefly discussed.