Characteristics of the genus Bacillidium Janda, 1928 (microspora, mrazekiidae) — Reinvestigation of the type species B. criodrili and improved diagnosis of the genus

Larsson, J.I. Ronny

doi:10.1016/s0932-4739(11)80201-4

Cited by 11 publications

(4 citation statements)

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“…To date, ultrastructural observations on the development of Bacillidium spp. have suggested that they are diplokaryotic throughout their development (Larsson, 1994). However, as Bacillidium infections are rarely encountered, these observations have all been conducted after the onset of sporogony when spores are clearly observable within hypertrophied cells.…”

Section: Discussionmentioning

confidence: 99%

“…Microsporidia of the genus Bacillidium are typically parasites of oligochaetes (Larsson & Gotz, 1996). This atypical microsporidian genus currently comprises 7 species, characterized by a large, rod-shaped spore, an exospore composed of 2 distinct components and a polar filament with an anterior manubrium (Larsson, 1994). The manubrium is a unique form of extrusion apparatus that is considered analogous to the polar filament of other microsporidia (Gotz, 1981).…”

Section: Introductionmentioning

confidence: 99%

“…This has confirmed that they are disporoblastic producing diplokaryotic spores. To date, all stages of development described using electron microscopy have been diplokaryotic and it has been proposed that the Bacillidium are diplokaryotic during both sporogony and merogony in the oligochaete host (Larsson, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructural and molecular characterization of Bacillidium vesiculoformis n. sp. (Microspora: Mrazekiidae) in the freshwater oligochaete Nais simplex (Oligochaeta: Naididae)

Morris

Terry²,

Ferguson³

et al. 2004

Parasitology

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The development of a new species, Bacillidium vesiculoformis n. sp. (Microspora, Mrazekiidae), is described from the freshwater oligochaete Nais simplex (Oligochaeta, Naididae). Initial stages of parasite development consist of a monokaryotic merogony within a haemocyte of the intestinal blood sinus. The resulting hypertrophied haemocyte is attached to the chloragocytes of the sinus by fine cytoplasmic extensions with the sinus around the cell becoming greatly enlarged. The meronts within the haemocyte form diplokaryotic sporonts that undergo sporogenesis directly within the cytoplasm of the host cell. The infected cell becomes packed with spores and developmental stages, causing it dramatically to increase in size, eventually rupturing the oligochaete and cell. Sporogony appears to be disporoblastic. Released spores were observed to have an adhesive quality. Transmission studies conducted with mature spores failed to transmit the parasite horizontally although vertical transmission was observed. Phylogenetic analysis of the parasite demonstrated that B. vesiculoformis clustered with microsporidian parasites of bryozoa and two other microsporidians, Janacekia debaiseuxi and an unidentified Bacillidium sp.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultrastructural and molecular characterization of Bacillidium vesiculoformis n. sp. (Microspora: Mrazekiidae) in the freshwater oligochaete Nais simplex (Oligochaeta: Naididae)

Morris

Terry²,

Ferguson³

et al. 2004

Parasitology

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“…The SV enclosing the sporogonial plasmodium divides with the plasmodium so that each spore is enclosed in its own SV. In contrast, the disporous genus Bacillidium is diplokaryotic throughout the life cycle and produces Bacillus-like spores from which a double membrane-like exospore layer may separate as a sac around individual spores (Larsson 1994). The sacs resemble SVs but have a different origin.…”

Section: Discussionmentioning

confidence: 99%