摘要:

RESUMEL'étude détaillée du cortex et des organelles buccaux deCyrtolophosis mucicolamontre que ce Cilié possède une organisation structural corticale comparable à celle deWoodruffia, Platyophrya, Kuklikophryaet desColpoda. Tout en restant conforme au plan général d'organisation de ces derniers, il a des variations spécifiques décelées au niveau des organelles buccaux qui confirment la position deC. mucicoladans la famille desCyrtolophosididae, incluse dans le sous‐ordre des P

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04230.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

SYNOPSISThe galactosephilic and mannosephilic hemagglutinins ofPseudomonas aeruginosaadsorbed ontoEuglena gracilis, Chlamydomonas reinhardi, andTetrahymena pyriformis. Furthermore, peroxidase binding to the 3 protozoan species was shown to be mediated by these lectins. Binding ofPseudomonaslectins toE. gracilisandC. reinhardicaused their specific agglutination, whereas no agglutination was observed withT. pyriformis, even after treatment by papain or by NaF. Added to the culture medium, thePseudomonashemagglutinins stimulated growth ofE. gracilisandT. pyriformisdue to their binding to these protozoa: this effect was partly inhibited by the specific sugar.

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04231.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

SYNOPSISInteracellular membrane potential and spontaneous changes associated with motile responses in the zooid of Vorticella convallaria Linnaeus were recorded by conventional electrophysiological technics. an all‐or‐none large transient depolarization (large pulse) occurs in association with a spontaneous contraction of the zooid. A small transient potential change (small pulse) was observed in association with periodic contraction of the contractile vacu

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04232.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

SYNOPSISLeishmania donovani amastigote‐to‐promastigote transformation is inhibited by homogenates of infected hamster liver and spleen. This inhibitory activity is localized in the 100,000 g pellet fraction. Tests with lysates of adherent (macrophyages) and nonadherent (lymphocytes) spleen cells indicated that the inhibitory activity resided in the lymphocytes, specifically in the 100,000 g pellet fract

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04233.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04234.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

SYNOPSISDeer micePeromyscus maniculatus(Wagner) were trapped near Hammett, Idaho, as a possible source ofBesnoitia jellisoniFrenkel and species of Sarcocystis to be used for life cycle studies. Forty‐nine deer mice were necropsied; 20 (40.8%) were positive for sarcocysts structurally identical with those of Sarcocystisidahoensissp. N. the source of S. idahoensis used for life cycle studies was a Great Basin gopher snakePituophis melanoleucus deserticolaStejneger killed near Hammett, Idaho; 20 sporulated sporocysts measured 11.1 × 13.4 (11‐12 × 13‐14) μm. Structurally identical sporocysts were found in 7 of 14 Pacific gopher snakesP. m. catenifer(Blainville), and in 6 of 10 San Diego gopher snakes,P. m. annectensBaird&Girard. Totals of 148 deer mice and 17 gopher snakes were necropsied in the course of life cycle studies. Development of the first generation meronts took place within the hepatocytes of deer mice 2‐10 days post‐inoculation (PI) with sporulated sporocysts. Rosette‐shaped meronts (6‐8 days PI) contained tachyzoites attached by their posterior poles to a residual body. After release from the residual body, tachyzoites were initially retained in a meront wall and later released from the hot cells Within muscle cells a single tachyzoite‐shaped structure was found 11 days PI and PAS‐negative metrocyte‐containing sarcocysts (2nd generation meronts) 13‐34 days PI. PAS‐positive material was first seen in sarcocysts 34 days II at which time bradyzoite formation became apparent. At 160 days PI, 10 sarcocysts measured 0.4 × 5.8 (0.2‐0.9 × 1.8‐9.9) μ and appeared to be mature and structurally identical with those from naturally infected deer mice. After ingestion ofS. idahoensis‐infected deer mice by gopher snakes, bradyzoites developed directly into microgamonts and macrogametes. These stages were first seen 5 days PI. Microgamonts were generally located above and macrogametes below the epithelial host cell nucleus. Seven to 11 days PI microgamonts were seen with mature microgametes, and oocysts which had not yet begun sporogony were found with oocyst walls. Clinical signs of illness were generally not observed in infected gopher snakes; however, one snake developed anorexia and cachexia, and became moribund after repeated ingestion of heavily infected deer mice. Acute hepatitis associated with developing meronts often was noted in deer mice given over 15,000 sporocysts each. Five to 6 days PI anorexia, weakness, ataxia, and dyspnea were observed: these clinical signs increased in severity until 6‐8 days PI, when mice became recumbent and died, or were killed while moribund. Hepatosplenomegaly, petechial hemorrhage o the serosal and cut surfaces of the liver, and icterus were common. Diffuse coagulative necrosis with cellular infiltration (primarily neutrophils)

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04235.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04236.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

SYNOPSISAntibodies induced in rabbits againstParamecium multimicronucleatumsyngen 2 prevent sexually reactive cells from clumping, pairing, and forming cytoplasmic fusions. A biologic assay for the detection of these antibodies (designatedblocking antibodies) is described. the blocking antibodies, unlike the immobilization antibodies, are produced against breis of sexually reactive cells and nonreactive cells of 2 types, nonstarved and immature. Isolated cilia from reactive cells of either mating type are weak immunogens for blocking antibodies. No correlation between the mating type specificity (III or IV) and these antibodies has been detected. Blocking antibodies can be absorbed with living cells, of which sexually reactive ones are the most effective absorbers, while immature ones are the least effective.

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04237.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

SYNOPSISIn the ciliate Euplotes crussus, doublet cells of 3 complementary mating types were mixed and multiconjugant complexesobtained. The cells were not uniform in the G, stage at the time of mixing. Despite asynchrony, the nuclear events of conjugationstarted and progressed coordinately in all the members of each complex, leading to a synchronous exchange of pronuclei. An adjustmentof the cellular timing takes place before the nuclei of multiconjugants begin dividing. This adjustment probably occurs through specificciliary contact during preconjugant interaction.

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04238.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

SYNOPSISNosema algerae, a microsporidan parasite of anopheline mosquitoes, was successfully replicated in 3 insect cell culture lines:Trichoplusia ni(TN‐368);Heliothis zea(IPLB‐1075); andMamestra brassicae(IZD‐Mb‐0503). Infectious spores were producedin vitro.Spores were observed at 48 h postinfection, and some cells were filled with sproes by 72 h.The number of parasites per cell increased with time. At 72 h postinfection, the infection rates for the 3 cell lines ranged from 23 to 32%. Infected cell lines were subcultured, and by the 6th passage spore production had

ISSN:0022-3921    

DOI:10.1111/j.1550-7408.1980.tb04239.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY