Microbiology Commons^™

Mast Cell Histamine Release Induced By Portuguese Man-Of-War (Physalia) Venom, A. Lester Flowers

Loma Linda University Electronic Theses, Dissertations & Projects

Richet and Portier studied the immunization of dogs against attenuated toxic extracts of the sea anemone and showed that, when given secondary injections of sublethal amounts of native toxic extracts, the dogs experienced severe pruritus and insensitivity followed by death. They called this increased sensitivity to the toxins, anaphylaxis. Richet and Portier, and later Jacques and Schachter, and Uvnäs also studied the direct pruritic and histamine releasing effects of cnidarian (e.g. Physalia, Actinia, Cyanea), toxic extracts. While the anaphylactic effect, discovered by Richet and Portier, has been extended by numerous studies to provide the foundation of our current knowledge of …

Evidence For The Horizontal Acquisition Of Murine Akr Virogenes By Recent Horizontal Infection Of The Germ Line, Stephen J. O'Brien, Janet L. Moore, Malcolm A. Martin, James E. Womack

Biology Faculty Articles

Several recent reports have established the biological and molecular genetic similarity between the endogenous AKV virus of strain AKR, and an N-ecotropic endogenous virus found in the genome of feral Japanese mice, Mus musculus molossinus. The similarities are so striking as to suggest a common origin of these viruses, which are present in some, but not all, inbred mouse strains. The virogenes of AKR mice may have been acquired by either: (a) common descent of AKR (and other AKV⁺ strains) from a common ancestor of AKR and molossinus animals, or (b) horizontal germ line infection of the AKR …

Enzyme Linked Immunosorbent Assay For Anatid Herpesvirus, Margaret Anne Lewis

Biological Sciences Theses & Dissertations

Duck plague virus causes a hemorrhagic disease affecting the family Anatidae, resulting in 60-80% mortality in captive flocks. Plaque and neutralization assays for Anatid herpesvirus (AHV) require 5-10 days for completion and are restricted by the seasonal availability of fertile duck eggs. The enzyme linked innnunosorbent assay (ELISA) is rapid and specific and avoids the use of living cells. The Holland strain of AHV was grown on duck embryo fibroblasts and purified by banding on CsCl gradients. The resulting virus was used to raise antisera in prebled New Zealand white male rabbits. Antibody production was confirmed in double diffusion plates …

Presence Of An Unusual Eosinophilic Staining Substance In The Blood Of Snakes, James J. Daly Sr., Charles H. Calhoun

Journal of the Arkansas Academy of Science

No abstract provided.

Bvr-1, A Restriction Locus Of A Type C Rna Virus In The Feline Cellular Genome: Pleiotropic Restriction Of Endogenous Balb Virus In Cat X Mouse Somatic Cell Hybrids, Stephen J. O'Brien, Janice M. Simonson

Biology Faculty Articles

Bvr-1 is a dominant X-linked feline gene which restricts the replication of B-tropic murineleukemia virus (B-MuLV) in somatic cell hybrids between murine BALB/c-RAG cells and FL-74 feline cells. Since the hybrids were originally derived by the hypoxanthine aminopterin thymidine selection scheme, counter selection experiments on 6-thioguanine result in preferential survival of hybrid cells which have spontaneously lost the feline X-chromosome on which is located the structural gene for hypoxanthine guanine phosphoribosyl transferase (IMP: pyrophosphate phosphoribosyl transferase, E.C. 2.4.2.8) and Bvr-1. Back selected Bvr-1^- cells express high parental levels of B-MuLV. Bvr-1^- effectively restricts the IdU-mediated induction of …

Lumpy Wool May Increase By Dipping : Research Roundup, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

Lumpy wool, or mycotic dermatitis, is an infectious disease on the skin of the sheep caused by the bacterium Dermatophilus conglensis. The organism invades the wool and hair follicles, causing formation of skin lesions producing scabby material which binds the wool fibres into a hard mass.

Research shows that 'dipping' may increase the incidence of lumpy wool with some chemicals a greater risk than others.

Lupinosis, M R. Gardiner

Journal of the Department of Agriculture, Western Australia, Series 4

In spite of many years of intensive investigation lupinosis remains a remarkably complex and baffling problem. Current research is throwing new light on the disease and it is now much better understood— although far from beaten.

Lupinosis research is co-ordinated by the Department of Agriculture's Lupinosis Committee, on which are represented all groups working on the disease. These include veterinary surgeons and pathologists, chemists, plant pathologists and animal husbandry specialists.

Chairman of the Committee is Dr M. R. Gardiner, Chief of the Department's Animal Division and a veteran of lupinosis research.

In this article Dr Gardiner summarises the current state …

Karyotype Of Geomys Pinetis (Mammalia: Geomyidae), With A Discussion Of The Chromosomal Relationships Within The Genus, S. L. Williams, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Summary. Four of the five subspecies of Geomys pinetis were karyotyped. All specimens examined had a diploid number of 42 and a fundamental number of 80. This karyotype was compared with the described karyotypes of other species of Geomys and was considered to be derived from an ancestoral form having a karyotype of about 70 acrocentric elements.

Lactic Dehydrogenase Isozyme Isolation By Disc Electrophoresis In Eight Species Of Fringillid Birds, Michael Edwin Darling

Dissertations and Theses

Disc electrophoresis of tissue homogenates from eight species of fringillid birds showed five forms of lactic dehydrogenase. The relative amounts of isozymes were characteristic for each species. This paper classifies some members of the families Fringillidae and Carduelidae in terms of lactic dehydrogenase isozymes and compares the results to other methods of classification.

Studies On The Nutritional Aspects Of Tubificid Worms, Thomas Nelson Seng

Masters Theses

No abstract provided.

The Comparative Morphology Of The Female Gonads Of Two Members Of The Nematode Order Tylenchida, Owen G. Coker

Masters Theses

No abstract provided.

Can Mastitis Be Eliminated?, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

Can mastitis be eliminated from a dairy herd? The results of a 12-month continuous study of four commercial herds show that it could be done.

Swine Fever And African Swine Fever, V W. Smith

Journal of the Department of Agriculture, Western Australia, Series 4

PIGS may become infected by viruses which also cause disease in other animals (for instance foot-and-mouth disease) but there are two virus diseases worthy of special mention because they cause clinical disease in pigs only.

A Survey Of The Incidence Of Salmonellosis In Three Groups Of Wild Animals, James T. Heiberger

Masters Theses

No abstract provided.

Biological Studies Of Selected Reaches And Tributaries Of The Colorado River, Nelson Thomas, Federal Water Pollution Control Administration

Publications (WR)

This report fulfills the request of the Colorado River Basin Project, Denver, Colorado, to determine the effects of municipal and industrial wastes on the aquatic life in selected waters of the Colorado River Basin. These studies were conducted with the assistance of personnel from the Colorado River Basin Project.

Some Aspects Of Carbohydrate Metabolism In The Cercariae Of Schistosoma Mansoni Sambon, 1907, A. Eugene Dunham Jr.

Loma Linda University Electronic Theses, Dissertations & Projects

Cercariac of Schistosoma mansoni were studied for glycogen utilization, uptake of glucose from solution, lactic acid production, and respiration.

Using the anthrone method of determination of carbohydrate, the amount of glycogen used by a single cercaria in 4 hours is determined as 43.2 x 10^-4 μg ± 6.6 x 10^-4 μg.

Glucose was not observed to have been used from solution under the conditions of the experiment, even in the presence of trehalose. The determinations were made by the Glucostat method.

After deproteinization and desugarization, aliquots of supernatant from cercarial suspensions were analyzed for lactic acid using p-phenylphenol …

Studies On The Planktonic Protozoa And Other Microbiota Of A Eutrophic Lake, Neil Howard Chance

Masters Theses

No abstract provided.

A Balanced Salt Culture Medium For Halteria Grandinella, Yee Wan Mark

All-Inclusive List of Electronic Theses and Dissertations

The animals that the writer worked with liere the unicellular organisms called liaJ,tez:ia grandil.!iilJ.a• They belong to the Pl~lum Protozoa and are placed in the Class Ciliata and the Order Oligotrichia. llftltez'A gDJ}gini•U, like most protozoa, ll ve in waters but they seem to prefer qUiet pools, lakes, and ponds in which aqua i;;!c plants are growing and in which there is much organic matter.

Life History Of A Haemogregarine, Hepatozoon Sp. In The Chuckwalla: Sauromalus, John E. Lewis

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

A Study Of The Coprophilous Ascomycetes Of Utah, David L. Hanks

Theses and Dissertations

Specimens of animal dung were collected from various areas of the state of Utah. These were cultured by placing a few small pieces in a culture dish over moistened sphagnum moss and filter paper. The cultures were observed periodically and specimens were studied as they matured upon the substratum. A total of eighty-four species representing three orders and fifteen genera are reported. Of these, nine species have not previously been described. Included is one species, Tripterospora erostrata, from the order Plectascales of the Series Plectomyceteae. Cited from the order Sphaeriales of the Series Pyrenomyceteae are forty-nine species as follow: Coniochaeta, …

Back Flushing On Milking Machine Teat Cups, G W R Scott, K. Needham

Journal of the Department of Agriculture, Western Australia, Series 4

THE possibility of replacing the dipping of teat cups between cows with a system of back flushing with water has been investigated for some time by different workers.

Chemical Sterilisers In The Dairy Industry, D N. Tulloch, N. Ingleton

Journal of the Department of Agriculture, Western Australia, Series 4

There is concern in the cheese industry that residues from new chemical sterilisers used by dairy farmers could affect cheese making processes.

The sterilisers could also affect tests for antibiotic residues in milk. The responsibility of seeing that chemical sterilisers do not enter the milk belongs to the dairy farmers.

They should follow the manufacturers' recommendations and use the chemicals with care.

Variations In Cream Tests, J F. Brennan

Journal of the Department of Agriculture, Western Australia, Series 4

DURING the year dairy farmers are often concerned about variations in the butterfat test of cream they supply to the butter factory.

Why do these tests vary? Is the variation the fault of the farmer or the butter factory?

Pullorum Tested Poultry Flocks : 1962, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

THIS year's pullorum tests of poultry flocks have revealed the lowest incidence of reactors since the tests began.

Results are recorded below.

Mycotic Dermatitis (Lumpy Wool) And Fleece Rot Of Sheep, J Shilkin

Journal of the Department of Agriculture, Western Australia, Series 4

Matted and sometimes discoloured specimens of wool are often received at the Department of Agriculture during seasons of heavy rainfall.

Two similar but quite distinct diseases are recognised as having caused this condition.

They are mycotic dermatitis (lumpy wool) and fleece rot. Both conditions damage the fleece and render affected sheep susceptible to blowfly strike.

Detergents For The Dairy Farm, H Maslin

Journal of the Department of Agriculture, Western Australia, Series 4

CLEANLINESS in both the physical and bacteriological sense is essential to the production of high quality dairy products, and high quality in these products is essential to both the health of the community and the successful and economic operation of the industry.

Detergents have an important place in maintaining dairy hygiene—but they must be properly used if they are to be really effective.

In this article Dairy Instructor H. Maslin, M.D.D., describes the qualities of a good dairy detergent and explains how it should be fitted into the regular cleaning routine.

Cleansers For The Milking Machine, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

WITH the opening of the flush season dairy farmers should make sure milking machines are working at maximum efficiency.

Machines not working efficiently can cause production losses and damage to cows as well as wasting farmers' time.

Is Your Water Supply Safe?, D C. Mickle

Journal of the Department of Agriculture, Western Australia, Series 4

THERE can be no doubt in anyone's mind that the need for a clean, safe and adequate water supply is essential for the production of high quality milk and cream.

It naturally follows, that, even though every possible care has been taken in an endeavour to produce clean, germ-free milk and cream, contamination by bad water can render these efforts void.

Preliminary Report: Monolayer Behavior Studies, 1959, Bureau Of Reclamation

Publications (WR)

During the fall of 1959, monolayer behavior studies were made on two lakes in the southwest; Boulder Basin of Lake Mead, Nevada, and Lake Sahuaro near Phoenix, Arizona. These studies were made to evaluate the effect of geographical and climatological conditions on movement and behavior of monolayers. The Lake Sahuaro tests also were used to provide data for design and development of improved methods of application and maintenance of a film on this lake in anticipation of full scale, evaporation-reduction tests to be performed there during the summer of I960. The Lake Mead studies produced the following general points of …

Natural And Experimental Infections Of Thelazia Californiensis Price (1930, Nematoda: Thelaziidae) With Descriptions Of The Adult And Larval Parasites, Howard S. Burnett

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this work was to determine the extent and effects of infestation of the eye worm of mammals, Thelazia californiensis, and to elucidate through experimentation or observation the mode of transmission.

A survey of literature revealed that thelaziasie (infestation by Thelazia species) may cause serious pathological changes in the eye and its adnexa, sometimes resulting in blindness. It was found that reports of thelaziasis in the United States were (with two exceptions) of cases in California. It was further found that T. californiensis has been reported in a wider variety of host than has any of other …