Renal sphaerosporosis in cultured grouper Epinephelus malabaricus

Supamattaya, K.; Fischer-Scherl, T.; Hoffmann, R.; Boonyaratpalin, S

doi:10.3354/dao008035

Cited by 16 publications

(7 citation statements)

References 6 publications

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“…Severe glomerular destruction associated with Sphaerospora spp. has been noted in a number of fish species (Molnar 1980; Meyers & McPherson 1985; Supamattaya et al. 1990), as also seen in this study.…”

Section: Discussionsupporting

confidence: 89%

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Mass mortality associated with a Sphaerospora‐like myxosporidean infestation in juvenile cobia, Rachycentron canadum (L.), marine cage cultured in Taiwan

Chen

Kou

et al. 2001

Journal of Fish Diseases

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Cultured cobia, Rachycentron canadum, of 45±80 g exhibited anaemia and ascites, and a mottled red and grey, extremely enlarged kidney with cream-coloured patches or spherical nodules. Cumulative mortality was about 90% within 1 month. Extrasporogonic or sporogonic stages of a myxosporean appeared in the blood, glomerulus, renal tubules and renal interstitium. The renal tubules were the main target tissue of the parasite and were completely occluded by sporogonic pseudoplasmodia at various degrees of maturity. Many sporogonic stages were attached to the brush border of the epithelium of the renal tubules. Mature spores were seen in the lumen of the tubules. They were elongated or spherical with numerous refractile granules in the cytoplasm. The polar ®lament formed 3±5 coils. No bacteria or viruses were isolated from the diseased ®sh. Based on the results of microbiological, histopathological and electron microscopical examinations, the cobia disease was believed to be caused by a Sphaerospora-like myxosporean. This is the ®rst report of a myxosporean in cobia in aquaculture.

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Section: Discussionsupporting

confidence: 89%

“…However, more recently, Sphaerospora spp. were found in South‐East Asia (Supamattaya, Fischer‐Scherl, Hoffmann & Boonyaratpalin 1990; Supamattaya et al. 1991).…”

Section: Discussionmentioning

confidence: 99%

Mass mortality associated with a Sphaerospora‐like myxosporidean infestation in juvenile cobia, Rachycentron canadum (L.), marine cage cultured in Taiwan

Chen

Kou

et al. 2001

Journal of Fish Diseases

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“…This paper describes a viral agent associated with mortalities of the grouper Epinephelus malabaricus cultured in Thailand. Many parasitic infestation and bacterial infection have been reported in fingerling and adult grouper cultured in cages (Supamattaya et al 1990(Supamattaya et al , 1991, but none of those organisms were proven to be the causative agents of mass mortality in grouper fingerlings associated with the signs of black tail, loss of equilibrium and corkscrew-swimming. Nutritional disorder is another suspected cause, but many nutritional ingredients have been tested on grouper and the signs of deficiency of each diet have not corresponded to the clinical signs observed.…”

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confidence: 99%

Picorna-like virus associated with mortality and a spongious encephalopathy in grouper Epinephelus malabaricus

Boonyaratpalin¹,

Supamattaya²,

Kasornchandra³

et al. 1996

Dis. Aquat. Org.

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A picorna-like virus was detected from diseased fry and fingerling grouper Epinephelus malabaricus cultured in southern Thailand. Affected grouper exhibited dark coloration of the head and tail, loss of equilibrium and corkscrew-like swimming. Pathological changes of affected fish showed vacuolating encephalopathy and retinopathy. Intracytoplasmic inclusions were observed in the nerve cells. From electron microscopic studies, virus particles could be detected in the brain and eyeball of affected fishes. They were round to icosahedral, without an envelope, 20 to 25 nm in diameter and had an electron dense core of 16 nm. Filtrates (0.45 pm) of affected brain and eyeball tissues can produce the same clinical signs in healthy grouper after injection, and the identical virus particles could be observed in the brain and retina of experimentally infected fish.

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“…Renal sphaerosporosis was found in cage-cultured grouper (Epinephelus malabancus) from estuarine areas of southern Thailand in 1989-1 990 [35]. Morphological and histopathological features of the myxosporean parasite found in the kidney tubules of diseased grouper were reported, but n o fresh material was available for fully describing the species.…”

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confidence: 99%

Sphaerospora epinepheli N. Sp. (Myxosporea: Sphaerosporidae) Observed in Grouper (Epinephelus malabaricus)

Supamattaya

Fischer-Scherl²,

Hoffmann³

et al. 1991

The Journal of Protozoology

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Sphaerospora epinepheli n. sp. is described from grouper, Epinephelus malabaricus, in cage-cultured and wild fish collected from both coastal lines of southern Thailand. Subspherical to spherical spores and mono- or disporous pseudoplasmodia were observed in the lumen of kidney tubules. Pseudoplasmodia were round to elongate, size range 15.6-22.9 microns (length) x 8.4-21.6 microns (width). Spores were 7.8-10.0 microns (length) x 12.3-14.5 microns (thickness), and 7.0-9.5 microns (width) with two spherical polar capsules of equal size measuring 2.9-4.4 microns in diameter and containing polar filaments with six or seven windings. Two uninucleate sporoplasms showed iodine vacuoles. Blood stages, similar to C-blood protozoans observed from freshwater fish in Europe, were found from peripheral blood smears of grouper. Ultrastructural studies of blood stages showed a similar structure to unidentified mobile protozoans from the blood of carp. Electron dense bodies were observed in the cytoplasm of the primary cell blood stages. Infected proximal-tubular epithelial cells showed highly vacuolated cytoplasm and pycnotic nuclei.

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Renal sphaerosporosis in cultured grouper Epinephelus malabaricus

Cited by 16 publications

References 6 publications

Mass mortality associated with a Sphaerospora‐like myxosporidean infestation in juvenile cobia, Rachycentron canadum (L.), marine cage cultured in Taiwan

Mass mortality associated with a Sphaerospora‐like myxosporidean infestation in juvenile cobia, Rachycentron canadum (L.), marine cage cultured in Taiwan

Picorna-like virus associated with mortality and a spongious encephalopathy in grouper Epinephelus malabaricus

Sphaerospora epinepheli N. Sp. (Myxosporea: Sphaerosporidae) Observed in Grouper (Epinephelus malabaricus)

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