• 한국어병학회지
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• 제37권1호
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• pp.79-88
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• 2024

Aeromonas spp. 감염은 관상어 산업뿐만 아니라 양식업에서도 상당한 경제적 손실을 초래하는 것으로 보고되고 있다. 한편 2022년 12월부터 2023년 1월 사이에 국내에서 사육중인 금붕어(Crassius auratus)에서 Aeromonas병증을 보이는 어체에 대해서 발병 원인균을 규명하기 위해서 조사 하였다. 병증을 보이는 금붕어의 피부와 내부 장기에서 그람 음성균이 분리되었다. Biochemical test와 16S rRNA gene으로는 Aeromonas 속까지 동정할 수 있었으나 종레벨까지는 구분하기 어려웠다. 이에 가장 상동성이 높았던 A.veronii를 대상으로 species-specific PCR을 수행했고 명확히 종 수준으로 동정할 수 있었다. 아울러서 장독소 유전자, 감염 실험 및 항생제 내성 분석을 수행하였다. 금붕어에 대한 균주의 생체 내 병원성 시험 결과, 실험 주사 후 일주일 이내에 감염된 숙주에서 100%의 치사율을 나타냈다. 장독소 유전자인 act 독력 유전자가 검출되었다. 균주의 항균제 감수성 분석 결과 대부분의 항균제에 감수성을 보였으나, Ampicillin, Imipenem, Meropenem 및 Clindamycin 약제에는 내성을 보였다.

• 한국동물위생학회지
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• 제20권3호
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• pp.307-312
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• 1997

To investigate the species and infection rate of Tripartiella sp in three species of freshwater fish, carp(Cyprinus carpio), goldfish(Crassius auratus) and Korean catfish(Parasilurus asotus), fish cultured in the fish farms next to Yosu and in the western area of Chunbuk province in Korea was examined from April to June, 1996. The infection rate was evaluated after observing the gill and mucous from 130 fish under the microscope. The species of Tripartiella was identified on the basis of the shape and number of denticle according to methods of Bychowsky(1985) after staining the parasites with 2% methyene blue solution. All the detected-parasite was classified as Tripartiella differed from Trichodina reported previously in our country. T carassii, T californica, T rhombi from Goldfish, T rhombi from common carp, T californica from Israeli carp and T bychowsky from Korean catfish were observed. In the fish from the fish farms in the western area of Chunbuk province, the infection rate of Tripartiella sp was ranged from 6.7% to 100%, but in neither carp nor goldfish from the farms next to Yosu the parasite detected.

• 한국어병학회지
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• 제21권2호
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• pp.93-105
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• 2008

Goldfish, Carassius auratus (wt 13 g) was intramuscularly infected with Aeromonas hydrophila (4.3x106 cfu / ml). Infected gills showed edematous lamellae with bacterial invasion into the capillaries and gill congestion on 12th day. By 24th day post-infection, histological analysis revealed irregular aggregates of macrophages in gill lamellae, large amount of mucus cells, gill lamellae edematous with bacterial invasion into capillaries, gill congestion and damaged gill epithelium with hyperplasia. Inflammation of the gill filament and hemorrhage globe was associated with the development of severe necrosis on the 36th day in the infected fishes. In infected and herbal treated fish the regenerative responses like fibrosis and infiltration of the leucocytes (neutrophils and monocytes) occurred on 12th day; moderate hypertrophy in the gills was noticed on the 36th day. These results suggest that phytotherapy ensures better protection and regenerative response against A. hydrophila infection in goldfish, C. auratus.

• 생명과학회지
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• 제26권11호
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• pp.1308-1312
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• 2016

갈륨은 갈륨비소와 같은 고속 반도체 제작에 사용되는 금속간 화합물 중 하나이다. 본 연구의 목적은 금붕어(Carassius auratus)에 갈륨을 적용 시 일어나는 혈청의 생화학 변수, 급성독성 및 적혈구 형태의 변화에 대해 알아보고자 한다. $LC_{50}$은 96시간 째 갈륨 농도 9.15 mg/ml로 나타났다. 갈륨을 농도별(2.0, 4.0, 8.0 mg/ml)로 금붕어에 노출시켜 28일 동안 독성실험을 하였다. 독성실험 결과 혈청의 생화학(글루코즈, 혈액요소질소, 크레아티닌, 콜레스테롤 및 중성지질)반응에서 갈륨 미처리 그룹과 다른 결과가 나타났다. 갈륨의 노출에 따른 적혈구의 변형으로 인한 호흡장애를 유발하는 것으로 사료된다. 실험에 사용된 금붕어와의 동일한 크기에 갈륨을 적용할 때 생물학적으로 안전한 농도는 2.0 mg/ml로 사료된다.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2002년도 춘계 수산관련학회 공둥학술발표회
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• pp.427-428
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• 2002

• 한국양식학회:학술대회논문집
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• 한국양식학회 2002년도 춘계 한국양식학회 학술대회 발표요지
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• pp.230.2-231
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• 2002

• Applied Microscopy
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• 제16권2호
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• pp.35-48
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• 1986

Ultrastructures of the cutaneous xanthophores and formation of pigment granules in the goldfish, Carassius auratus L., are studied with electron microscope. The cutaneous xanthophores are observed only in dermis and pigment granules of these pigment cells are pterinosomes and carotenoid vesicles. By the differentiated level, pterinosomes are subdivided into 3 types; while type I pterinosomes have clear limiting membranes and contain some amorphous fine fibrous structures, type II pterinosomes have thick and densely aggregated fibrous materials. Type III pterinosomes have concentric lamellar structures in the granules. Pigment granules of the xanthophores are originated from the Golgi complexes and pinocytotic vesicles of plasma membrane as well as rER-rich cells among the chromatophores are presumed to be associated with the accumulation of pigment materials.

• Applied Microscopy
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• 제24권1호
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• pp.1-10
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• 1994

The integumental secretory structure is exocrine unicellular gland located in the epidermis of goldfish, Carassius auratus, and divided into two groups, mucous and granular cells. By the histochemical studies of integumental secretions the mucos cells reacted for acidic polysaccharides, and the granular cells for neutral glycoprotein. According to concentration of the secretion the integumental mucous are gradually sulphated. The mucous cells are typical form of goblet cell located in the upper region of the epidermis, and membrane bounded vesicles of the mucous are observed several size and electron densities by the cellular differentiation. The granular cells in middle and lower epidermis are present syncitial forms occasionally, and contain electron dense granules sized $1.0{\mu}m$ which are accumulated in cytoplasmic process held the cells to the basal lamina. The precursors of the integumental secretory materials are originated from the rough endoplasmic reticulum and next transported through the Golgi apparatus as a form of membrane bounded vesicles. After accomplish this process mature secretions are extruded to integumental surface by the mechanism of merocrine secretion in response to nerve stimulations respectively.

• Environmental Analysis Health and Toxicology
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• 제19권4호
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• pp.353-357
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• 2004

난황단백질인 비탈로제닌을 성숙한 암컷 붕어 혈청으로부터 음이온 교환 크로마토그래피를 이용하여 정제 하였다. 정제한 비탈로제닌을 BALB/c mice를 이용하여 폴리크로날 항체를 생산하였고 이를 protein A column을 사용하여 정제하였다. 또한 이렇게 정제된 폴리크로날 항체를 이용한 붕어 비탈로제닌 측정용 효소면역측정법을 개발하였으며 그 측정 범위는 2∼l,000ng/mL이고 recovery 변동 범위는 88∼112%였다. 또한 이 효소면역측정법을 평가하기 위해 성숙한 수컷 붕어를 1,000ng/L ethinylestradiol(EE$_2$) 에 4주 동안 노출시켜 유도되어지는 비텔로제닌을 측정하였다. 그 결과 성숙한 수컷 붕어의 경우 비탈로제닌이 3주 만에 암컷 붕어의 평균수치만큼 유도됨을 알 수 있었다.

• Applied Microscopy
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• 제17권1호
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• pp.65-75
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• 1987

The ultrastructure of the cutaneous chromatophores and the origin of pigment granules in the goldfish, Carassius auratus L., are studied with electron microscope. Leucophores contain amorphous pigment granules, leucosomes and melanosomes contain oval shaped electron dense melanin pigment granules. These pigment granules are synthesized from the Golgi complexes of each chromatophores and released into the cytoplasm. Among the dermal chromatophores, another kind of dermal cells, named rER rich cells, are also observed. And pinocytotic vesicles are being formed only the inner surface of the chromatophores adhering to the rER rich cells. From these observations, such hypothesis are being possible that pigment materials are synthesized and transfered from the rER rich cells to dermal chromatophores by the pinocytosis. And next remodelizing mechanisms are carried out by the Golgi complexes of each chromatophores.