Seasonal fluctuation and histopathology of Henneguya ghaffari (Myxozoa: Myxosporea) infection in the gills of the Nile perch, Lates niloticus, in the River Nile: a new locality record

Abdel‐Baki, Abdel‐Azeem S.; Sakran, Thabet; Zayed, Eman; Al‐Quraishy, Saleh

doi:10.1007/s00436-014-3786-z

Cited by 11 publications

(2 citation statements)

References 18 publications

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“…Therefore, M. dajiangensis n. sp. might destroy the functional respiratory surface of the gills if the infection was serious enough ( Abdel-Baki et al, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Morphological description and molecular identification ofMyxobolus dajiangensisn. sp. (Myxozoa: Myxobolidae) from the gill ofCyprinus carpioin southwest China

Wang

Zhang

Zhao

2022

PeerJ

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Background Myxosporean diversity is a hot topic since they are difficult to accurately identify and classify. Many Myxobolus parasites have been named as Myxobolus koi because of their similar morphological features with the species originally reported. However, the distinctions in fine morphological features, host specificity, and molecular data have given rise to the attention of researchers. Methods The classical morphometric and histological methods were used to describe the Myxobolus dajiangensis n. sp. in morphology. The common techniques in modern molecular biology and the methods of phylogenetic analyses were combined to identify the species. Results Plasmodia of interlamellar-vascular type were found in the vascular network of gill lamellae. Mature myxospores of M. dajiangensis n. sp. were elongated and pyriform from the frontal view. The myxospores were 14.8 ± 0.4 (13.9–15.6) µm in length, 8.0 ± 0.5 (7.2–9.1) µm in width, and 5.5 µm in thickness. The two polar capsules were pyriform and slightly different in length. The length of the larger polar capsules was 8.0 ± 0.4 (7.1–8.8) µm, and it was 7.4 ± 0.4 (6.1–8.0) µm for the smaller ones. The width of both polar capsules was 2.5 ± 0.2 (2.0–3.2) µm. The polar filaments within the polar capsules were each coiled nine to 11 turns. Comparative analysis of both the morphological and molecular data between the present speices and other similar species revealed that the present species is a novel species, Myxobolus dajiangensis n. sp. Also, M. koi (FJ710800) was misidentified and the congener with M. dajiangensis n. sp., depending on the secondary structures of SSU rRNA and phylogenetic analysis. Moreover, the cryptic species existed in the M. koi parasites.

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“…Therefore, M. dajiangensis n. sp. might destroy the functional respiratory surface of the gills if the infection was serious enough ( Abdel-Baki et al, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Morphological description and molecular identification ofMyxobolus dajiangensisn. sp. (Myxozoa: Myxobolidae) from the gill ofCyprinus carpioin southwest China

Wang

Zhang

Zhao

2022

PeerJ

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“…), and for Henneguya ghaffari (Abdel‐Baki et al. ). Some other myxosporean species, however, have showed a higher prevalence in summer and a lower prevalence during other seasons (Abdel‐Baki et al.…”

Section: Discussionmentioning

confidence: 99%

Molecular and Morphometric Characteristics of Ceratomyxa hamour n. sp. (Myxosporea: Bivalvulida) Infecting the Gallbladder of the Orange‐spotted Grouper Epinephelus coioides from the Arabian Gulf, Saudi Arabia

Mansour

Al-Qahtani

Al‐Quraishy

et al. 2014

J Eukaryotic Microbiology

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Ceratomyxa hamour n. sp. was found to infect the gallbladder of the orangespotted grouper, Epinephelus coioides located off the Saudi Arabian coast of the Arabian Gulf. The infection was reported as a free-floating spore in the bile, and pseudoplasmodia were not observed. Mature spores were crescentshaped and measured on average 7 lm in length and 16 lm in thickness. The polar capsule, meanwhile, had length to width measurements of 4 lm and 3 lm on average. A periodical survey was conducted throughout a sampling period between December 2012 and December 2013, with the results showing that the parasite was present throughout the year with a mean prevalence of 32.6%. The objective of this study was to characterize this new species based on its morphological and molecular differences from previously described species. Molecular analysis based on the partial sequence of the SSU rDNA gene, showed the highest similarity (97.8%) to Ceratomyxa buri, reported in the cultured yellow tail Seriola quinqueradiata in Japan. Indeed, C. buri and the new species described here formed an individual cluster with a high degree of bootstrap support. This is the first reported species of genus Ceratomyxa from the Arabian Gulf fishes off Saudi Arabia.

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Morphology, phylogeny and seasonal prevalence of Ceratomyxa arabica n. sp. (Myxozoa: Myxosporea) infecting the gallbladder of Acanthopagrus bifasciatus (Pisces: Sparidae) from the Arabian Gulf, Saudi Arabia

et al. 2014

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A new myxozoan species was recovered from the gallbladder of Acanthopagrus bifasciatus from the Arabian Gulf in Saudi Arabia. The overall prevalence of infection was 28.6 % (32/112), with the highest prevalence 42.9 % (12/28) in winter and 10.7 % (3/28) as the lowest in autumn. The new species is described using its morphological characteristics and small subunit (SSU) rDNA. Spores of Ceratomyxa arabica n. sp. are stubby-shaped with unequal shell valves, 8 (7-9) μm in length × 12 (10-14) μm in thickness. Polar capsules are sub-spherical, unequal, 3 (2.5-3.5) × 2 (1.5-2.5) μm. The polar filament has three turns and is slightly slanted towards the longitudinal axis of the capsules. The small subunit rDNA (SSU rDNA) sequence confirms that the present species is a member of the genus Ceratomyxa, being most closely related to Ceratomyxa cardinalis with a sequence similarity of 97.77 %.

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Seasonal fluctuation and histopathology of Henneguya ghaffari (Myxozoa: Myxosporea) infection in the gills of the Nile perch, Lates niloticus, in the River Nile: a new locality record

Cited by 11 publications

References 18 publications

Morphological description and molecular identification ofMyxobolus dajiangensisn. sp. (Myxozoa: Myxobolidae) from the gill ofCyprinus carpioin southwest China

Morphological description and molecular identification ofMyxobolus dajiangensisn. sp. (Myxozoa: Myxobolidae) from the gill ofCyprinus carpioin southwest China

Molecular and Morphometric Characteristics of Ceratomyxa hamour n. sp. (Myxosporea: Bivalvulida) Infecting the Gallbladder of the Orange‐spotted Grouper Epinephelus coioides from the Arabian Gulf, Saudi Arabia

Morphology, phylogeny and seasonal prevalence of Ceratomyxa arabica n. sp. (Myxozoa: Myxosporea) infecting the gallbladder of Acanthopagrus bifasciatus (Pisces: Sparidae) from the Arabian Gulf, Saudi Arabia

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