First Report on the Occurrence of an Actinosporean Stage (Myxozoa) in Oligochaetes from Spanish Freshwaters

Székely, Cs; Sitjà‐Bobadilla, Ariadna; Álvarez-Pellitero, Pilar

doi:10.1556/004.48.2000.4.6

Cited by 17 publications

(9 citation statements)

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“…The aurantiactinomyxon is a taxon-rich collective group composed of more than 20 actinospore types in previous studies (Styer et al 1991;Yokoyam et al 1993;Trouillier et al 1996;McGeorge et al 1997;El-Mansy et al 1998b, c;Xiao and Desser 1998b, c;Székely et al 2000Székely et al , 2003Székely et al , 2004Negredo and Mulcahy 2001;Özer et al 2002;Oumouna et al 2003;Holzer et al 2004;Marcucci et al 2009). The aurantiactinomyxon type examined differed from these types with much longer, slight downward curved and spines or rays-like caudal process, pointed process tips and 64 secondary cells in sporoplasm.…”

Section: Discussionmentioning

confidence: 94%

“…Many studies have widely reported the actinospore fauna from fish farms and natural water, and the life cycle of many myxozoan species in Europe El-Mansy et al 1998a, b;Xiao and Desser 1998a, b, c;Hallett et al 1999Hallett et al , 2002Székely et al 2000Székely et al , 2002aSzékely et al , b, 2003Székely et al , 2004Székely et al , 2005Negredo and Mulcahy 2001;Özer et al 2002;Oumouna et al 2003;Marcucci et al 2009) and eastern Asia (Yokoyam et al 1993;1995). However, until now, few actinospores have been reported in China, and no myxozoan life cycle.…”

Section: Introductionmentioning

confidence: 99%

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Three actinosporean types (Myxozoa) from the oligochaete Branchiura sowerbyi in China

Zhang

Xie

et al. 2013

Parasitol Res

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Three actinosporean types-raabeia, aurantiactinomyxon, and guyenotia-from the oligochaete Branchiura sowerbyi Beddard collected from a crucian carp (Carassius auratus gibelio) pond are described in this report. Compared with the actinospores described previously, the raabeia type presents similar spore shape with the actinospore of Myxobolus cultus, except a much longer caudal process, 250.8 μm (217.5-276.3). The aurantiactinomyxon and guyenotia type significantly differ from other actinospores in its same collective group with different caudal process shape (taper and leaf-like) and dimension, 170.8 μm (167.5-176.3) and 18.5 μm (16.5-20.6), respectively. The partial 18S rDNA sequences of raabeia and aurantiactinomyxon types, and myxospores M. cultus, Myxobolus wulii, Myxobolus pyramidis, and Thelohanellus wuhanensis detected from pond-reared crucian carp were determined. Based on DNA sequences analysis, the raabeia type showed high genetic similarity (99.5-100 %) with myxospore M. cultus Yokoyama, Ogawa & Wakabayashi, 1995 on the gills of crucian carp sampled from the same pond. The aurantiactinomyxon showed no more than 85.2 % sequence similarity with myxospores determined in this report and other myxozoans available from GenBank.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Three actinosporean types (Myxozoa) from the oligochaete Branchiura sowerbyi in China

Zhang

Xie

et al. 2013

Parasitol Res

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“…Until now, only Yokoyama et al (1993), Yokoyama (1997), El-Mansy et al (1998a,b) and Székely et al (2000) have recorded aurantiactinomyxon types of the relatively large-sized Branchiura sowerbyi. The prevalence of actinosporean infection was relatively low, significantly less than found by El-Mansy et al (1998b) in Lake Balaton or by Székely et al (2003) in Japan, but corresponded to results obtained in other similar surveys (Xiao & Desser 1998, Negredo & Mulcachy 2001, Özer et al 2002and Oumona et al 2003.…”

Section: Discussionmentioning

confidence: 99%

Description of a new actinosporean type from South African freshwaters

Székely¹,

Avenant‐Oldewage²,

Molnár³

2004

Dis. Aquat. Org.

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Actinospore infection of oligochaetes collected from the mud of 2 freshwater biotopes in South Africa was studied. Using the 'cell-well plate method', a new aurantiactinomyxon type was found in 1.1% of the examined Branchiura sowerbyi oligochaete specimens from the Rietvlei River, north of Johannesburg, Gauteng, South Africa. In 1.5% of B. sowerbyi collected in a pond (Padda Dam), near the Rand Afrikaans University, Johannesburg, the same aurantiactinomyxon type was found. Infected oligochaetes were found only after collection and no actinosporean release was recorded in Branchiura specimens kept alive for several weeks. Actinospore infection showed a high intensity in oligochaetes in both positive cases. Until now, no actinosporean stages of myxosporeans have been described from South Africa. The aurantiactinospore type presented in this communication differs from the known types already described in the literature.KEY WORDS: Myxosporea · Aurantiactinomyxon · Actinospore · Branchiura sowerbyi · Oligochaete · Alternate host · Padda Dam · Gauteng · Rietvlei River · South Africa Resale or republication not permitted without written consent of the publisherDis Aquat Org 61: [95][96][97][98][99][100][101][102] 2004 cell-well plates (according to Yokoyama et al. 1991). Starting the following day, the water layer above each oligochaete in each of the wells was examined daily for 3 d for the presence of released actinospores. Then, the oligochaetes were kept in plastic tubes for 1 wk and the water in each tube was changed daily in order to keep the oligochaetes alive. The oligochaetes were then transported to Hungary and monitored for actinospore release for an additional 2 mo.If examination with a stereomicroscope indicated the presence of spores, the actinospores floating or adhering to the walls of the cell-well plates were examined on a slide with a light microscope at higher magnification. Microphotographs were then taken of the spores using a Zeiss Axioplan 2 compound microscope attached to a computer and the digital pictures were archived by Axiovision software. Subsequently, drawings were made of the actinospores and their measurements were taken. The characteristic dimensions of actinospores (size of polar capsules, diameter of spore body, length and width of caudal processes, largest span of processes) and the number of secondary cells in the sporoplasm were recorded by measuring newly released spores according to the guidelines suggested by Lom et al. (1997). To determine the dimensions of actinospores, measurements of 10 mature spores were averaged. A part of the released actinospores were fixed in 80% ethanol and transported to Hungary for further morphological studies. Measurements of spores were calculated from specimens on digitised photographs in South Africa and some additional measurements were made on 20 actinospore specimens fixed in ethanol. The measurements of these latter spores were measured with the help of a WinImago ® program. Some of the representative oligochaetes from all th...

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“…In the past 20 years, more than 200 actinosporean types (18 collective groups) have been described by numerous authors from across the globe, including Canada, Hungary, Ireland, Australia, and Japan et al (eg. El-Mansy et al 1998a, b;Xiao and Desser 1998a, b;Rácz and Timm 2002;Lom and Dyková 2006;Székely et al 2000Székely et al , 2003. Sixteen of these actinospores have identified its counterpart myxozoan species by morphological, histolomolecular, and experimental infection methods (El-Mansy et al 1998c;Negredo and Mulcahy 2001;Orsolya et al 2004;Dennis et al 2005;Kallert et al 2005a, b;Atkinson et al 2007;Atkinson and Jerri 2009;Caffara et al 2009;Székely et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Identification and characterization of one novel type of Triactinospomyxon with short spore axis

2011

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This study identifies and characterizes one novel type of triactinospomyxon in oligochaete specimen of Branchiura sowerbyi Beddard collected from a fish pond used for rearing gibel carp located in Caidian Experimental Station of the Institute of Hydrobiology. It is nominated as Triactinospomyxon caidianensis type. The spore is of characteristic triactinomyxon "anchor" shape and possesses a spore body with sporoplasm containing 32 germ cells, 3 polar capsules, and 3 caudal processes. Compared with other triactinomyxon spores described previously, T. caidianensis type has a short spore axis with 76.5 μm in length and a very short style with 38.9 μm in length. Molecular analyses on 18S rDNA sequences indicate that the novel T. caidianensis type is most closely related to Triactinomyxon sp SA-2005, Antonactinomyxon sp KAB-2001, and Synactinomyxon sp KAB-2001 with 80.33% to 81.92% identities. On the basis of spore morphology and genetic data, the T. caidianensis type presented in this paper differs from those already known and described in the literatures.

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First Report on the Occurrence of an Actinosporean Stage (Myxozoa) in Oligochaetes from Spanish Freshwaters

Cited by 17 publications

References 0 publications

Three actinosporean types (Myxozoa) from the oligochaete Branchiura sowerbyi in China

Three actinosporean types (Myxozoa) from the oligochaete Branchiura sowerbyi in China

Description of a new actinosporean type from South African freshwaters

Identification and characterization of one novel type of Triactinospomyxon with short spore axis

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