Ultrastructure of an unidentified microsporidium from the convergent lady beetle, Hippodamia convergens Guérin-Méneville

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dc.contributor.advisor Bjørnson, Susan Eleanor
dc.creator Le, Jeffrey
dc.date.accessioned 2011-06-13T15:06:03Z
dc.date.available 2011-06-13T15:06:03Z
dc.date.issued 2009
dc.identifier.other QL596 C65 L4 2009
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/22985
dc.description vi, 36 leaves : ill. ; 29 cm. en_CA
dc.description Includes abstract and appendix.
dc.description Includes bibliographical references (leaves 31-34).
dc.description.abstract An unidentified microsporidium was found in adult Hippodamia convergens Guérin-Méneville that were obtained from a commercial insectary for aphid biological control. Ultrastructure of the microsporidium was examined by transmission electron microscopy. All stages of the microsporidium were diplokaryotic and the pathogen developed in direct contact with host cell cytoplasm. Two morphologically distinct spores were observed. The first type had a thin exospore, thickened endospore, and typical internal spore structures. The second spore type was atypical in appearance, lacking any discernable internal structures. Typical and atypical spores measured 3.5 ± 0.2 x 2.06 ± 0.19 μm ( n = 10) and 3.38 ± 0.8 x 2.13 ± 0. 16 μm ( n = 10), respectively. Based on spore dimensions and pathogen ultrastructure, the results of this study indicate that the microsporidium in question is likely Nosema hippodamiae Lipa & Steinhaus. Further evidence based on molecular techniques is required for continuation. en_CA
dc.language.iso en en_CA
dc.publisher Halifax, N.S. : Saint Mary's University en_CA
dc.subject.lcc QL596.C65
dc.subject.lcsh Ladybugs -- Parasites
dc.subject.lcsh Hippodamia -- Parasites
dc.subject.lcsh Microsporidia
dc.title Ultrastructure of an unidentified microsporidium from the convergent lady beetle, Hippodamia convergens Guérin-Méneville en_CA
dc.type Text en_CA
thesis.degree.name Master of Science in Applied Science
thesis.degree.level Masters
thesis.degree.discipline Biology
thesis.degree.grantor Saint Mary's University (Halifax, N.S.)


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