Lateral line depigmentation (LLD) in channel catfish, Ictalurus punctatus (Rafinesque)
Identifieur interne : 000309 ( Main/Exploration ); précédent : 000308; suivant : 000310Lateral line depigmentation (LLD) in channel catfish, Ictalurus punctatus (Rafinesque)
Auteurs : J. Corrales [États-Unis] ; A. Ullal [États-Unis] ; E J Noga [États-Unis]Source :
- Journal of Fish Diseases [ 0140-7775 ] ; 2009-08.
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Abstract
Head and lateral line erosion (HLLE) is a chronic dermatopathy affecting a number of fish that presents as depigmented skin along the lateral line system of the trunk and head. We present microbiological, immunological and histopathological features of this lesion in channel catfish, Ictalurus punctatus (Rafinesque), that developed after exposure to a chronic nutritional stress. Depigmention was limited to skin that was adjacent to the lateral line. The epidermis of affected fish was thin and reduced to a one‐cell‐thick layer over the lateral line. Melanocytes were depleted at the dermo‐epidermal junction and formed aggregates in the epidermis. Innate immunity was weaker in affected fish than that previously measured in well‐fed channel catfish. Because the pathology and apparent aetiology of HLLE described in various fish species are highly variable, HLLE appears to be a clinical sign, rather than a disease or syndrome. Thus, we propose that this clinical sign be referred to as lateral line depigmentation (LLD), because this description more accurately encompasses all cases of this presentation reported in fish. As nutritional requirements of channel catfish and lateral line neuroanatomy are well‐known, the ability to reproducibly induce LLD in this species could provide a useful model for understanding its pathogenesis.
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DOI: 10.1111/j.1365-2761.2009.01069.x
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We present microbiological, immunological and histopathological features of this lesion in channel catfish, Ictalurus punctatus (Rafinesque), that developed after exposure to a chronic nutritional stress. Depigmention was limited to skin that was adjacent to the lateral line. The epidermis of affected fish was thin and reduced to a one‐cell‐thick layer over the lateral line. Melanocytes were depleted at the dermo‐epidermal junction and formed aggregates in the epidermis. Innate immunity was weaker in affected fish than that previously measured in well‐fed channel catfish. Because the pathology and apparent aetiology of HLLE described in various fish species are highly variable, HLLE appears to be a clinical sign, rather than a disease or syndrome. Thus, we propose that this clinical sign be referred to as lateral line depigmentation (LLD), because this description more accurately encompasses all cases of this presentation reported in fish. As nutritional requirements of channel catfish and lateral line neuroanatomy are well‐known, the ability to reproducibly induce LLD in this species could provide a useful model for understanding its pathogenesis.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Caroline du Nord</li></region></list><tree><country name="États-Unis"><region name="Caroline du Nord"><name sortKey="Corrales, J" sort="Corrales, J" uniqKey="Corrales J" first="J" last="Corrales">J. Corrales</name></region><name sortKey="Noga, E J" sort="Noga, E J" uniqKey="Noga E" first="E J" last="Noga">E J Noga</name><name sortKey="Ullal, A" sort="Ullal, A" uniqKey="Ullal A" first="A" last="Ullal">A. Ullal</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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