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  • Articles  (2)
  • Barcelona zoo (Spain)  (1)
  • Cellular inclusions  (1)
  • Springer  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Exocytosis of cortical granules from activated oocytes of the toad, Bufo arenarum (1984)
    Springer
    Cell & tissue research 237 (1984), S. 191-194 
    Details
    ISSN: 1432-0878
    Keywords: Cellular inclusions ; Cortical granules ; Exocytosis ; Oocytes ; Amphibians (Bufo arenarum)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Observation of the cortical region of oocytes of Bufo arenarum by transmission electron microscopy reveals modifications on their surface and in the contents of the cortical granules (CG) during activation. In non-activated oocytes only amorphous cortical granules (ACG) can be observed. Activated oocytes display ACG, intermediate cortical granules containing both amorphous and membranous material (ICG), and a third type containing only membranous material (MCG). During exocytosis, CG release their contents into the perivitelline space, where the amorphous and membranous materials are found. The three types of CG found during oocyte activation suggest transformation of ACG to MCG and indicate that the different components of the cortical granules, when released into the perivitelline space, might play different roles in prevention of polyspermy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229217
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  • 2
    Electronic Resource
    Electronic Resource
    Further report on Cryptosporidium in Barcelona zoo mammals (2000)
    Springer
    Parasitology research 86 (2000), S. 318-323 
    Details
    ISSN: 1432-1955
    Keywords: Key wordsCryptosporidium ; Endemicity ; Primates ; Herbivores ; Barcelona zoo (Spain)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The prevalence of fecal shedding of Cryptosporidium in 36 primates (21 species and subspecies) and 62 herbivores (36 species and subspecies) housed at the Barcelona zoo was studied. Cryptosporidial oocysts were found in stool samples of 14 Primate, 18 Artiodactyla, 2 Perissodactyla, and 1 Proboscidea species. None of them showed symptoms related to the parasite. Neither the sex nor the group condition (alone or in a group) of the animals studied appeared to be correlated with parasitic prevalence. The results extend the host species range of the protozoan to 18 new animals (6 Primate, 10 Artiodactyla, 1 Perissodactyla, and 1 Proboscidea species) and confirm the endemic status of Cryptosporidium at the Barcelona zoo. We conclude that maintenance of the parasitic endemic status is probably due to the presence of animal carriers as well as to the physical features of some facilities where oocysts could remain viable and infectious.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004360050049
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    Paper (German National Licenses)
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