Gene/Protein Disease Symptom Drug Enzyme Compound
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 58,342 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Two water soluble products currently recommended for the treatment of syngamiasis were tested in pheasants and turkeys. Dichloroxylenol (Rotgape; Adams & Moulson), was found to have no efficacy. Although tetramisole (Game Bird Wormer; ICI) administered in drinking water had a moderate efficacy against three- and four-day-old larvae (47 to 71 per cent), its level of efficacy against infections associated with disease, those of seven days and older, was poor (5 to 29 per cent). It is concluded that neither product is likely to be of value in field outbreaks of syngamiasis.
Vet Rec 1977 Jul 09
PMID:Efficacy of tetramisole and dichloroxylenol against Syngamus trachea in pheasants and turkeys. 14 49

Most disease problems affecting farmed salmonid fish are either caused or exacerbated by bad husbandry and poor environmental conditions. The aspects of water quality and nutrition which are significant in causing husbandry problems are considered. The clinical aspects of these diseases are decribed in terms of the life cycle of salmonids, and methods of prevention are discussed.
Vet Rec 1975 Jul 19
PMID:Veterinary aspects of salmonid fish farming: husbandry diseases. 16 80

The activity of the electrolyte transport enzyme, sodium, potassium-activated adenosine triphosphatase (Na+,K+-ATPase), in the gills of the pinfish, Lagodon rhomboides, increased markedly following transfer of fish from brackish water to seawater. Cytochemical localization of Na+,K+-ATPase via its potassium-dependent phosphatase (K+-NPPase) activity in the branchial epithelium of pinfish adapted to seawater demonstrated that chloride cells are the major sites for the enzyme. Subcellularly, the heaviest depositions of reaction product were observed lining the cytoplasmic membrane surfaces of the labyrinth of anastomosing plasma membrane tubules that ramifies throughout the chloride cell cytoplasm. Enzyme activity was demonstrated also on the cytoplasmic surface of the apical crypt membrane and on the cytoplasmic surfaces of vesicles in the cytoplasm subjacent to the crypt. Deletion of potassium from the cytochemical incubation medium or inclusion of 10 mM ouabain abolished the reaction products associated with these membranes. The significance of these cytochemical results is discussed with reference to current hypotheses of chloride cell function.
Anat Rec 1979 Jan
PMID:Ultracytochemical localization of Na+,K+-activated ATPase in chloride cells from the gills of a euryhaline teleost. 21 85

A knowledge of environmental requirements is important in order to obtain good growth and health when farming salmonid fish. Biological requirements are discussed, including water quality parameters and nutritional aspects. The main techniques used for farming salmonids are described together with the annual cycle of operations undertaken on a commercial trout farm.
Vet Rec 1975 Jul 05
PMID:Veterinary aspects of salmonid fish farming: husbandry. 23 32

Tight junctions (zonulae occludentes) create a pericellular barrier to the diffusion of large molecules in non-keratinizing mammalian epithelia. However, in cornifying epithelia such as the epidermis, the importance of tight-junctional elements versus secreted intercellular lipid for barrier function is uncertain. In an attempt to resolve this question, we compared membrane structure in the stratum granulosum and stratum corneum of epidermis, esophagus, and vagina of newborn and adult humans and mice under both normal and various experimental conditions. We incubated pieces of epidermis in organ culture and infused tissues with lanthanum or horseradish peroxidase in vivo and in vitro. All were processed for electron microscopy of freeze-fracture replicas or thin sections. Lanthanum seeped outward to the stratum granulosum in all tissues examined--further apical migration was halted by lamellar-body contents in skin. A similar pattern of intercellular lamellar lipid deposition and membrane structure occurred in all epithelia studied. Freeze-fracture replicas of these obstructive regions revealed occasional, incomplete junctional strands (particularly in moist epithelia) and abundant lamellar material, but complete zonulae occludentes were never encountered. A possible relationship between moisture and tight junction formation was further suggested by organ culture experiments during which brief incubations stimulated an increase in the number of junctional strands and diminished numbers of lamellar bodies. We conclude that, in the epithelia studied, the deposition of secreted lamellar body contents forms the barrier to water-soluble tracer loss: tight-junctional elements are either absent or too fragmentary to constitute an effective barrier.
Anat Rec 1977 Dec
PMID:Membrane alterations during cornification of mammalian squamous epithelia: a freeze-fracture, tracer, and thin-section study. 33 80

In a herringbone milking parlour, teat cup liners were deliberately contaminated in turn with Staphylococcus aureus, Escherichia coli, Streptococcus agalactiae and Sterp uberis. Contamination was achieved by filling the liners with milk that contained 10(6) test organisms per ml. After the clusters had been back-flushed with water at 85 degrees C for five seconds, normal swabbing methods failed to recover any contaminating organisms from the teat liners in 56 tests out of 64. After 10 seconds back-flushing no recoveries were made in the same number of tests. The apparatus developed to effect this back-flushing for a particular herringbone parlour is described, with details of its routine use during milking. For a 100-cow herd, the running cost of such equipment using a five-second back-flush is estimated at no more than 4 pounds per week and, in its present form, would not add more than 10 seconds to the total milking time for each cow. Improvements in design of the apparatus, and in milking techniques arising from the routine use of the device, are also considered.
Vet Rec 1978 Jan 14
PMID:Apparatus for pasteurising teat cup liners between cows in a herringbone parlour. 34 97

A series of infections in a herd of dairy cows by different salmonella serotypes over a seven year period is described. The source of infection appeared to be the private water supply contaminated by seagulls.
Vet Rec 1979 Dec 08
PMID:The possible involvement of seagulls (Larus sp) in the transmission of salmonella in dairy cattle. 39 68

Brief descriptions are given of the common skin diseases in aquarium fishes. Many of these diseases are secondary to poor water quality and aquarium conditions and this primary cause should always be considered.
Vet Rec 1977 Aug 13
PMID:Diseases of aquarium fish--2: skin diseases. 41 Dec 32

Electron microscopic observations and measurements were made on thin-sectioned chromatin fibers and fibrils obtained from nuclei of mature chicken erythrocytes. The nuclei were isolated in low ionic strength gum arabic and octanol then extracted sequentially with (1) 0.14 M NaCl, (2) 0.25 N HCl, (3) buffer saturated phenol, (4) hot 5% SDS and 0.14 M 2-mercaptoethanol and, (5) 0.4 N NaOH. The amount of nuclear protein removed at each of the first four extraction steps was 1, 86, 3 and 11% of the total, respectively. Each extract was characterized by electrophoretic profiles. At each extraction the chromatin was fixed by adding large quantities of a mixture of equal volumes of sodium cacodylate buffered 8% (w/v) glutaraldehyde (pH 6.8) and 2% OsO4 (w/v), directly into (1) an aliquot of the chromatin in extraction fluid, and (2) an aliquot of the chromatin after water washing and swelling. Three size classes of chromatin structure were seen in thin sections prepared for high resolution transmission electron microscopy and stained with uranyl acetate and lead citrate. A thick fiber of about 25 + nm diameter was the predominant large fiber seen in freshly isolated nuclei or in nuclei after salt extraction. This 25 + nm fiber has a substructure consisting of 3.2-5.2 nm diameter fibrils. After water swelling of such freshly isolated or salt extracted nuclei a fiber of about 10 nm diameter was the predominant large fiber instead of the 25 nm diameter fiber. The HCl extraction step which is known to remove histones, caused the disappearance of both the 25 nm and the 10 nm fibers. High magnification (600,000 x) micrographs of the chromatin at all procedural steps, except the last NaOH step, reveal the fibril to be omnipresent. This fibril tends to decrease somewhat in diameter during the protein extraction steps to a 2.5 nm diameter fibril after the hot SDS extraction. A fibril of 2.5 nm diameter is expected of naked double helical DNA stained with a positive stain. The NaOH, which is known to denature DNA, completely destroyed the remaining fibril. We inerpret our results to indicate that the larger chromatin fiber seen in micrographs of thin-sectioned chromatin has a fibrillar substructure which probably represents a double coil of native DNA which may have a thin protein coating of its own. The latter fibril may in turn be wrapped around a hydrophobic histone domain, perhaps reflected in the 10 nm diameter fiber which is seen upon swelling of the chromatin. This 10 nm diameter fiber is thought to be further packaged by folding into the 25 + nm diameter chromatin fiber most frequently reported in thin sections of eukaryotic cell nuclei in situ.
Anat Rec 1979 Aug
PMID:Chromatin substructure: an electron microscopic study of thin-sectioned chromatin subjected to sequential protein extraction and water swelling procedures. 47 16

Daily water consumption in pheasants varied from 240 ml per kg at three weeks of age to 80 ml per kg at 12 weeks. Variations in temperatures within the range 10 to 25 degrees C exerted little influence on water intake. The amount of water consumed increased at a given age as dietary protein level increased. Only a small increase (14 per cent) in water intake accompanied a more than doubled increase in the normal dietary salt level. Total daily water intakes were similar in pheasants fed three times a day and in those fed ad libitum but their patterns of consumption throughout the day were widely different.
Vet Rec 1979 Apr 21
PMID:Water consumption in growing pheasants. 55 2


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