fish disease Flashcards

1
Q

Neobenedenia

A

貝尼登蟲capsalid

  • 寄生於teleost(硬骨魚)的皮膚 → 移動至四周的肉 → 造成失明 (either single or both sides)
  • 好發於冬天
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2
Q

Benedenia

A

貝尼登蟲capsalid

寄生在皮膚上

20-26℃好發 10-15 天成熟, 50-300eggs/day—20000eggs

10-15 天 hatched

台灣通常採淡水浸泡的方式治療,但還是常常發生,是因為箱 網上面會卡著蟲卵,而經過淡水處理的魚,因為 stress,免疫 力下降,反而更容易受到感染

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3
Q

Nitzachis

A

貝尼登蟲capsalid:大、海水

寄生於 sturgeon(鱘類)

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4
Q

dactylogyrid

A

指環蟲

***infect gills,淡水、

爛腮: 破壞二級鰓薄板,致鰓絲潰爛、增生

有眼點for sensing

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5
Q

Pseudodactylogyrus

A

偽指環蟲

➢ 主要寄生在鰻魚鰓部

➢ 治療用藥:Mebendazole

➢ 用藥時蟲會躲在消化道,很難殺死

➢ 造成一級鰓薄板 fusion

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6
Q

Gyrodactylus salaris

A

三代蟲gyrodactyllid

魚摩擦池壁、跳躍(水面狂奔)→出血斑 Body surface 潰瘍

➢ 體型小、診斷不容易、繁殖快

➢ 感染鮭鱒科魚類,是唯一一個 OIE 指定進出口需檢疫的寄生蟲

➢ 造成野生鮭鱒科魚類族群毀滅

➢ 嚴重感染 parr(幼鮭)→ 體表產 生過多黏液→併發黴菌感染

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7
Q

polyopisthocotydean

A

多後盤蟲

大、海水

主要吸附在鰓部,吸血維生

吸血較不會 留下傷口,less tissue damage

Heteraxine spp., Discocotyle spp., Micrcotyle spp.

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8
Q

Subphylum Clitellata

A

Annelida魚蛭

半寄生:生殖時才附著在體表吸血,吸完血,產卵後便脫落 ➢ 對魚體危害較小

生活在有「底泥」的地方

(1) 池子內營養因子過高 (2) 活動力下降的虹鱒,無法甩開魚蛭 (3) 底泥太厚,具水草的池子
1. 2.5% 氯化鈉 2. 氧化鈣 3. 0.2%的 lysol(消毒水) 4. 0.005% 氯化銅

prolonged immersion of mazoten (80% trichlorfon) for 5 minutes!!!不建議用在蝦

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9
Q

Turbellarian

A

渦蟲

多細胞、只有游動、依賴水中的細菌& organic matters過活

水質不好的時候會增生

致死率低、造成個體不適

clinical signs: 黑點

treatments (repeated recommended)

  1. freshwater dips
  2. formalin dips
  3. organophosphates (不能用於水晶蝦)
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