Microsporidian (Glugea sp.) infection in the greasy grouper Epinephelus tauvina (Forsskal, 1775)

A case of microsporidian (Glugea sp.) infection in the greasy grouper, Epinephelus tauvina (Forsskal) was studied by light microscopy as well as histological examination. The parasite was located in the subcutaneous tissue and visceral organs, forming spherical blackish xenomas of about 1-2.5 mm in diameter surrounded by a layer of connective tissue. The observed characteristics of the parasite are in line with those of the other Glugea species; showing merogony in the outer zone of the cytoplasm of the host cell, sporogony in sporophorous vesicles, and mature ovoid spores 4-6.5 μm x 2-2.2 μm located in the central part of the blackish xenoma. These characteristics suggested that the microsporidian which was found to infect E. tauvina during the present investigation was Glugea sp

Histopathology of Y-organ in Indian white shrimp Fenneropenaeus indicus, experimentally infected with white spot syndrome virus

Histopathology of Y-organ (moulting gland) in Indian white shrimp Fenneropenaeus indicus was studied after challenging the shrimp with virulent white spot syndrome virus (WSSV). Histopathological investigation on the Y-organ collected from moribund shrimps revealed the presence of intranuclear basophilic inclusions, characteristic of WSSV. More than 70% of the Y-organ cells were infected, suggesting the degenerated state of the organ. The cellular integrity of the Y-organ was completely destroyed by the WSSV. Further, Y-organ tissue samples collected from all the 16 experimental shrimp were positive by one-step polymerase chain reaction (PCR), confirming severe WSSV infection. The infected Y-organ in F. indicus with majority of the organ cells observed in the lysed condition suggests a physiological dysfunction of the organ. In uninfected and healthy controls, the lobulated Y-organ showed closely packed normal cells with prominent nuclei and sparse cytoplasm. Physiological implication of a degenerated Y-organ in the moulting and reproduction of the penaeid shrimp is discussed

Co-infection of Yellowtip Halfbeak Fish (Hemiramphus marginatus) with Isopod and Copepod Parasites from the Coromandal Coast, India

Parasitic fish diseases constitute one of the most important problems in fisheries sector. Among fish parasites, cymothoids are obligatory parasites, infesting mostly commercially important fishes. They are protandric hermaphrodites and blood suckers, living on the skin, gill filaments, or in the mouth of the fishes. These parasites retard growth and cause emaciation followed by death. Pathological conditions resulting from parasitic diseases assume high magnitude of epidemics under crowded and other unnatural conditions among fish.Isopod parasite of the family Cymothoidae under order Beloniformes have been reported from about 350 fish species and over 80% of these occurrence are from tropical and subtropical seas, majority being from the Indo-Malaysian archipelago (Lester, 1995)

Not Available

Not AvailableA case of microsporidian (Glugea sp.) infection in the greasy grouper, Epinephelus tauvina (Forsskal) was studied by light microscopy as well as histological examination. The parasite was located in the subcutaneous tissue and visceral organs, forming spherical blackish xenomas of about 1-2.5 mm in diameter surrounded by a layer of connective tissue. The observed characteristics of the parasite are in line with those of the other Glugea species; showing merogony in the outer zone of the cytoplasm of the host cell, sporogony in sporophorous vesicles, and mature ovoid spores 4-6.5 μm x 2-2.2 μm located in the central part of the blackish xenoma. These characteristics suggested that the microsporidian which was found to infect E. tauvina during the present investigation was Glugea sp.Not Availabl

Not Available

Not AvailableNot AvailableNot Availabl

Not Available

Not AvailableParasitic fish diseases constitute one of the most important problems in fisheries sector. Among fish parasites, cymothoids are obligatory parasites, infesting mostly commercially important fishes. They are protandric hermaphrodites and blood suckers, living on the skin, gill filaments, or in the mouth of the fishes. These parasites retard growth and cause emaciation followed by death. Pathological conditions resulting from parasitic diseases assume high magnitude of epidemics under crowded and other unnatural conditions among fish.Isopod parasite of the family Cymothoidae under order Beloniformes have been reported from about 350 fish species and over 80% of these occurrence are from tropical and subtropical seas, majority being from the Indo-Malaysian archipelago (Lester, 1995).Not Availabl

Occurrence of philometra lateolabracis (philometridae) in the subcutaneous caudal fin region of sciaenid fishes of Bay of Bengal Large Marine Ecosystem (BOBLME), Tamil Nadu (India)

Present study consists the prevalence of philometrid nematode, Philometra lateolabracis infections in two species of Sciaenid fishes along the Madras coastal water, Bay of Bengal during December, 2008 to July, 2012. Out of total 295 sciaenid fishes, examined, Otolithes ruber and Pennahia macrophthalmus showed 70% & 32.5% of parasitic prevalence on the subcutaneous region on caudal fins. The number of parasitic worms per fish varied from 1 to 7 with an average of 3.18±1.64. Parasites length varies from 5-16 mm with an average of 11.18±4.62 mm. The minimum and maximum sizes and weight of Sciaenid fishes were caught from Kasimedu landing centre (Chennai) during October-December, 2012 varied from180-287 mm and weight 120-245 gm respectively

Not Available

Not AvailablePresent study consists the prevalence of philometrid nematode, Philometra lateolabracis infections in two species of Sciaenid fishes along the Madras coastal water, Bay of Bengal during December, 2008 to July, 2012. Out of total 295 sciaenid fishes, examined, Otolithes ruber and Pennahia macrophthalmus showed 70% & 32.5% of parasitic prevalence on the subcutaneous region on caudal fins. The number of parasitic worms per fish varied from 1 to 7 with an average of 3.18±1.64. Parasites length varies from 5-16 mm with an average of 11.18±4.62 mm. The minimum and maximum sizes and weight of Sciaenid fishes were caught from Kasimedu landing centre (Chennai) during October-December, 2012 varied from180-287 mm and weight 120-245 gm respectively.Not Availabl

Not Available

Not AvailableNot AvailableNot Availabl