Th. Fischer-Scherl

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Myxobolus cotti (Myxozoa: Myxosporea) is described as found in the central nervous system of the bullhead (Cottus gobio) caught in the Alpine lake Königssee and in a brook in the Bavarian Forest, Federal Republic of Germany (El-Matbouli and Hoffmann 1987). Aggregations of spores and polysporoblastic trophozoites compressed and replaced large areas of the(More)
Presporogonic (blood) stages of Sphaerospora epinepheli Supamattaya, Fischer-Scherl, Hoffmann, Boonyaratpalin, 1990 were observed in the circulating blood, sinus of kidney, glomerurar capillaries and liver arteries of grouper Epinephelus malabaricus. The earliest detectable stage was a primary cell with one secondary cell. After cell divisions, nine to 16(More)
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(More)
High losses due to metacercaria of Bucephalus polymorphus especially in cyprinids were observed in summer 1984 during a period of a sudden increase in water temperature. Pathology of diseased fish is described. Factors, such as eutrophication of the water system and overcrowding of distinct fish species, are discussed to be the main causes provoking(More)
The effects of the herbicide atrazine (2-Chlor-4-ethyl-amino-6-isopropyl-amino-s-triazine) on the kidney of rainbow trout (Oncorhynchus mykiss) were studied by exposing them to sublethal concentrations of 1.4 and 2.8 mg atrazine per liter of water for 96 h (acute exposure) respectively to 5, 10, 20, 40, and 80 micrograms/L for a period of 28 days (chronic(More)
Rainbow trout (Oncorhynchus mykiss) developed a post-infectious chronic membranous glomerulonephritis 15 months after they had been experimentally infected with Renibacterium salmoninarum. Histologically, peritubular and periglomerular fibrosis, hypercellular glomeruli with occluded Bowman's space, and partial or complete adhesion to Bowman's capsule were(More)
In November 1987 high losses of carp (Cyprinus carpio) with the main symptom of skin ulcera were observed in a farm in northern Greece. Sixty-six isolates of bacteria, characterized mainly as Aeromonas hydrophila or Pseudomonas spp. could be isolated from lesions of diseased fish. Transmission experiments with these isolates using mirror carp showed that(More)
Important diseases of reptiles are described with references to the diagnostic material and patients of the Institute of Zoology and Hydrobiology between 1984 and 1990. The commonest causes of mortality were pneumonia, parasites and poor husbandry. Problems associated with the increasing popularity of reptiles as pets, and appropriate treatments are(More)
Myxosporea species in the central nervous system of fish and host-parasite interactions are described. Whereas parasites living in the nervous tissue itself do not induce clinical signs or host reactions, Myxosporea localized in neighbouring mesenchymatous tissues (blood vessels, cartilages, meninges) may induce disease of economic significance.
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