Showing papers in "Journal of Invertebrate Pathology in 1979"

TL;DR: Direct evidence is presented to show that conidia can also germinate inside of spiracle openings and could invade larvae by this route, and extensive surface hyphal growth, with or without eventual penetration of the integument, is evident.

TL;DR: Explants and swabs from the pericardium and mantle of three strains of Biomphalaria glabrata, two of them resistant to infection with Schistosoma mansoni, have yielded small amoebae, 3–5μm in diameter, in culture.

TL;DR: In this paper, the response to a single injection of E. coli LPS was dose dependent and persisted for at least 5 days; however, additional injections had no effect on serum lysozyme level.

TL;DR: The data do not permit conclusions with respect to memory in these molluscan immune responses, but do imply a qualitative “improvement” in this quasi-immune response of M. californianus.

TL;DR: The pathogenesis and midgut histopathology which resulted when larvae of the blackfly were exposed to Bacillus thuringiensis at various temperatures and periods of exposure were investigated, with gross signs of disease included cessation of feeding and tetany with brachytosis.

TL;DR: Adult females of Culex salinarius, transovarially infected with the microsporidium Amblyospora sp.

TL;DR: In crayfish cuticle, proteins with associated phenoloxidase activity were attached to cell walls of Aphanomyces astaci as well as to those of S. cerevisiae .

TL;DR: Electron microscopy has confirmed that the particulate fraction of the calyx fluid is composed of virus particles and it appears that this virus, injected with the egg at oviposition, actually reduces host weight gain.

TL;DR: Nonoccluded virions have been isolated from the extracellular fluid of cultured Spodoptera frugiperda cells that have been infected with Autographa californica nuclear polyhedrosis virus and two major proteins of MW 65,000 and 42,000 have been found.

TL;DR: Results show that B. sphaericus remains viable and infective 9 months after application as a larvacidal agent of mosquitoes in a roadside ditch.

TL;DR: Streptococcus faecalis, the only bacterium occurring almost invariably at high populations in guts of Galleria mellonella larvae, suppresses bacteria ingested with food by producing bacteriocin, an antibioticlike substance having a narrow range of bactericidal activity, and by releasing a lysozymelike enzyme.

TL;DR: The polyhedral envelope of the nuclear polyhedrosis virus of Heliothis virescens was separated from the matrix proteins and nucleocapsids by alkaline dissolution and differential centrifugation as discussed by the authors.

TL;DR: The cytotoxic effect of δ-endotoxin, unlike that of valinomycin, seemed to be a general breakdown of ion regulation on the cell level.

TL;DR: It is postulated that hemagglutinin binding to the surface of larval helminths may “mask” them from being recognized by the snail host's cellular defense system.

TL;DR: It was ascertained quantitatively that oyster hemocytes are attracted to live E. coli, B. megaterium, and M. varians but not to heat-killed bacteria, and the chemoattractant is some molecule emitted by living vegetative cells of certain Gram-positive as well as Gramnegative bacteria.

TL;DR: It is demonstrated that low prevalence rates during the early instars result mainly in larval mortality of older instars which ultimately leads to the greatest production and persistence of polyhedra in the forest ecosystem.

TL;DR: It was determined that challenge with heat-killed bacteria sesulted in significant elevations in acid phosphatase activity in both cells and serum at 1, 2, and 4 hr postinjection, with the level being highest at 2 hr.

TL;DR: Small thermal injuries were used to examine the ability of Anthopleura elegantissima to establish a successful inflammatory response and a zone of repair formed which contained distinctly atypical cells morphologically suited for the production and secretion of unknown substances.

TL;DR: The genus Ameson, observed with the electron microscope in muscles of the crabs Carcinus maenas and C. mediterraneus from the coast of France, was found to be structurally similar to the type species A. michaelis, and is transferred to family Unikaryonidae.

TL;DR: The nematode Heterorhabditis bacteriophora serves as a vector enabling its bacterial associate to reach the hemocoel of its host, the seventh-instar larva of Galleria mellonella.

TL;DR: The sequence of events as the water mold develops and enters mosquito larvae through the cuticles of these insects is established and there is a correlation of cuticular texture with adhesion patterns of cysts.

TL;DR: Comparison of restriction endonuclease EcoRI cleavage patterns of DNA isolated frompolyhedra used as inocula and from polyhedra obtained after cross-inoculation showed that cross infection did not occur, indicating that latent viruses were activated in both insects.

TL;DR: Interactions between V. necatrix and three other pathogens of Heliothis zea were evaluated with dose-mortality studies in order to find a synergistic combination which could be tested for field control of H. zea.

TL;DR: A recent report (Leibovitz et al., 1979) described a serious disease of hatchery-reared larval Pacific oysters, Crassostrea gigas, and electron microscopy showed both complete and incomplete particles as mentioned in this paper.

TL;DR: The large Mytilus edulis cells possess many ultrastructural properties that are characteristic of certain malignant vertebrate cells, however, alternative explanations for their structure and function are also possible.

TL;DR: Triplosporium (Entomophthora) fresenii overwinters on citrus trees in Israel as zygospores which germinate in March and April by means of capillary conidiophores bearing capillispores (anadhesive conidia) in synchronization with spring buildup of Aphis spiraecola populations on citrus.

TL;DR: The ovotestes and accessory genitalia of snails infected with S. douthitti were much reduced in size in comparison with uninfected control snails, and these effects were most pronounced in snails which had been infected for over 100 days.

TL;DR: Tenlipase-negative mutants from a lipase-positive virulent strain of Beauveria brongniartii were found to be avirulent, similar to lipase -negative strains isolated from nature.

TL;DR: The first picornavirus from crustacean hosts is reported, widespread in the tissues of an isopodan parasitic castrator and its shore crab host, collected in San Francisco Bay, California.