Quadriacanthus aegypticus n. sp., a monogenean gill parasite from the Egyptian teleost Clarias lazera

El-Naggar, M.M.; Serag, Hanaa M.

doi:10.1007/bf00009869

Cited by 13 publications

(3 citation statements)

References 10 publications

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“…The anterior portion of the pharynx of M. clarii was reported by El-Naggar and Serag (1987) to protrude during feeding, as has been described for other monogeneans, namely E. soleae and Acanthocotyle sp. (Kearn 1963), M. polpteri (Khalil 1970), Dactylogyrus hemiamphibothrium and D. amphibothrium (see El-Naggar and Kearn 1980), and Quadriacanthus aegypticus (see El-Naggar and Serag 1986). The mechanism by which this is achieved is not known.…”

Section: Discussionmentioning

confidence: 93%

Neuromusculature of Macrogyrodactylus clarii, a monogenean gill parasite of the Nile catfish Clarias gariepinus in Egypt

et al. 2004

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Phalloidin fluorescence technique, enzyme cytochemistry and immunocytochemistry in conjunction with confocal scanning laser microscopy have been used for the first time to describe the nervous and muscle systems of the viviparous monogenean gill parasite, Macrogyrodactylus clarii. The gross spatial arrangement of muscle and associated cholinergic, peptidergic and aminergic innervations has been examined. The central nervous system (CNS) consists of paired cerebral ganglia from which emanate three pairs of longitudinal ventral, lateral and dorsal nerve cords, connected at intervals by transverse connectives. The CNS is better developed ventrally than dorsally or laterally, and has the strongest reactivity for all neuroactive substances examined. Structural and functional correlates of the neuromusculature of the pharynx, haptor and reproductive tracts have been examined. Results implicate acetylcholine, FMRFamide-related peptides (FaRPs) and serotonin in sensory and motor function in this monogenean, although confirmatory physiological data are obviously required.

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Section: Discussionmentioning

confidence: 93%

Neuromusculature of Macrogyrodactylus clarii, a monogenean gill parasite of the Nile catfish Clarias gariepinus in Egypt

et al. 2004

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“…The anterior portion of the pharynx of the gyrodactylid monogeneans was reported to protrude during feeding (El-Naggar and Serag 1987;Arafa 1999;El-Naggar and El-Abbassy 2003) as well as other monogeneans, namely, Entobdella soleae and Acanthocotyle sp. (Kearn 1963), Macrogyrodactylus polypteri (see Khalil 1970), D. hemiamphibothrium, D. amphibothrium (see El-Naggar and Kearn 1980) and Quadriacanthus aegypticus (see El-Naggar and Serag 1986). Protrusion of the anterior region of the pharynx of M. congolensis may be controlled by the extrinsic muscles attached to this region.…”

Section: Discussionmentioning

confidence: 98%

Neuromusculature of Macrogyrodactylus congolensis, a monogenean skin parasite of the Nile catfish Clarias gariepinus

et al. 2006

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Phalloidin fluorescence technique, enzyme cytochemistry and immunocytochemistry, in conjunction with confocal scanning laser microscopy, were used to describe the neuromusculature of the monogenean skin parasite Macrogyrodactylus congolensis from the Nile catfish Clarias gariepinus. The body wall muscles are composed of an outer layer of compactly arranged circular fibres, an intermediate layer of paired longitudinal fibres and an inner layer of well-spaced bands of diagonal fibres arranged in two crossed directions. The central nervous system consists of paired cerebral ganglia from which three pairs of longitudinal ventral, lateral and dorsal nerve cords arise. The nerve cords are connected at intervals by many transverse connectives. Both central and peripheral nervous systems are bilaterally symmetrical and better developed ventrally than laterally and dorsally. Structural and functional correlates of the neuromusculature of the pharynx, haptor and reproductive tracts were examined. Results implicate acetylcholine, FMRFamide-related peptides and serotonin in sensory and motor function. The results were compared with those of Macrogyrodactylus clarii, a gill parasite of the same host fish C. gariepinus.

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“…Some samples were prepared for morphological investigation. The collected Q. aegypticus monogenean parasites were identified according to the studies of Paperna [68] and El-Naggar and Serag [69]. Following the feeding period, the fish were exposed using the bath exposure method to a solution of Q. aegypticus (40 individuals/L) [70].…”

Section: Parasitic Challenge Testmentioning

confidence: 99%

Growth Retardation, Oxidative Stress, Immunosuppression, and Inflammatory Disturbances Induced by Herbicide Exposure of Catfish, Clarias gariepinus, and the Alleviation Effect of Dietary Wormwood, Artemisia cina

El-Houseiny

Anter

Arisha

et al. 2023

Fishes

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The present study evaluated the impact of chronic herbicide (oxyfluorfen; OXY) exposure on catfish, Clarias gariepinus, in terms of growth, hematobiochemical parameters, immune response, antioxidant- and immune-related gene expression, and resistance to monogenean parasites, Quadriacanthus aegypticus. In addition, the protective role of Wormwood, Artemisia cina (AC) against OXY exposure through diet inclusion was also analyzed. The catfish fingerlings were exposed to OXY (1.16 mg/L) for 60 days and fed diets without AC supplementation (control) and with 5% AC supplementation. The results demonstrated that exposure to OXY stunted growth; decreased survival, erythrograms and leukograms, serum protein, and acetylcholinesterase; and negatively altered the antioxidant status. On the contrary, AC supplementation significantly reduced OXY’s negative impacts on growth and hematological, biochemical, and antioxidant balance. In addition, exposure to OXY markedly increased levels of biomarkers of hepatorenal damage, stress indicators, and DNA damage, which were alleviated with AC supplementation. OXY exposure induced immunosuppression manifested by a decrease in lysozyme activities, complement c3, nitric oxide levels, and phagocytic activity. Furthermore, exposure to OXY negatively regulated the expression of immune-antioxidant genes (CAT, GPX1, SOD1, GST, and TGF-Β1). However, it upregulated the expression of CYP1a, IL-1β, and TNF-α in the liver, anterior kidney, and intestine of C. gariepinus. Meanwhile, the addition of AC to the OXY-exposed fish diets notably restored immune components and remedied the altered immune-related gene expressions. Likewise, the AC supplementation significantly alleviated the OXY-induced reduction in the fish survival rate after Q. aegypticus challenge. Accordingly, AC dietary supplementation in catfish diets could alleviate the negative impact of exposure to OXY on growth performance, physiological status, and some immune-antioxidant-related gene expression.

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Quadriacanthus aegypticus n. sp., a monogenean gill parasite from the Egyptian teleost Clarias lazera

Cited by 13 publications

References 10 publications

Neuromusculature of Macrogyrodactylus clarii, a monogenean gill parasite of the Nile catfish Clarias gariepinus in Egypt

Neuromusculature of Macrogyrodactylus clarii, a monogenean gill parasite of the Nile catfish Clarias gariepinus in Egypt

Neuromusculature of Macrogyrodactylus congolensis, a monogenean skin parasite of the Nile catfish Clarias gariepinus

Growth Retardation, Oxidative Stress, Immunosuppression, and Inflammatory Disturbances Induced by Herbicide Exposure of Catfish, Clarias gariepinus, and the Alleviation Effect of Dietary Wormwood, Artemisia cina

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