Infectious Diseases of Fish
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Questions and Answers

What causes Ulcer or Aeromoniasis in fish?

  • Aeromonas sp. (correct)
  • Pseudomonas sp.
  • Mycobacterium fortuitum
  • Flavobacterium columnare

    • What clinical sign is associated with Mycobacteriosis?

  • Eroded fins
  • Whitish margin of fins
  • Grey-white nodules on internal organs (correct)
  • Distended abdomen

    • Which treatment is recommended for treating fin and tail rot?

  • Fish feed mixed with antibiotics (correct)
  • Disinfection with KMnO4
  • Bath treatment with nifurpirinol
  • Dip in 500 ppm KMnO4

    • What organism causes Columnaris disease?

    <p>Flavobacterium columnare</p> Signup and view all the answers

    Which of the following clinical signs is characteristic of Dropsy?

    <p>Scale protrusion</p> Signup and view all the answers

    When treating bacterial gill disease, which clinical symptom is observed?

    <p>Necrotic gill tissues</p> Signup and view all the answers

    What is a common treatment for Aeromonas hydrophila infections?

    <p>Disinfect pond with KMnO4</p> Signup and view all the answers

    Which clinical sign indicates Fin and Tail Rot?

    <p>Eroded fins</p> Signup and view all the answers

    What is the treatment for Cotton wool disease caused by Saprolegnia parasitica?

    <p>Bath treatment in KMnO4 @ 160 mg/l for 5 days</p> Signup and view all the answers

    For gill rot caused by Branchiomyces, what is a recommended bath treatment?

    <p>Bath treatment in NaCl @ 3-4% for 5-10 min</p> Signup and view all the answers

    Which clinical sign is associated with White spot disease caused by Ichthyophthirius multifilis?

    <p>Erratic swimming and white spots</p> Signup and view all the answers

    What is the concentration of malachite green oxalate recommended for the treatment of White spot disease?

    <p>0.15-0.20 mg/l for 4-6 hours</p> Signup and view all the answers

    What is a common clinical sign of gill rot?

    <p>Disintegration of gill tissues</p> Signup and view all the answers

    What is the recommended treatment for Cotton wool disease in addition to salt treatment?

    <p>KMnO4 bath treatment @ 160 mg/l for 5 days</p> Signup and view all the answers

    What causes erratic swimming in fish?

    <p>White spot disease caused by Ichthyophthirius</p> Signup and view all the answers

    What is the treatment duration for gill rot using KMnO4?

    <p>5-10 min</p> Signup and view all the answers

    Which treatment method is used for fish lice infestation?

    <p>Prolonged treatment with 0.2 mg/l Trichlorphon for 24 hours</p> Signup and view all the answers

    What dietary deficiency is primarily associated with scoliosis and lordosis in fish?

    <p>Deficiency of the amino acid tryptophan</p> Signup and view all the answers

    Which sign is associated with pin head disease in fish?

    <p>Sluggish movements</p> Signup and view all the answers

    What is the most likely consequence of an imbalanced diet in fish?

    <p>Scoliosis and lordosis</p> Signup and view all the answers

    Which treatment is suggested for constipation in fish?

    <p>Feeding with Daphnia</p> Signup and view all the answers

    What clinical sign indicates a possible nutritional deficiency in fish?

    <p>Swelling of the belly</p> Signup and view all the answers

    What is a common treatment for fish suffering from poor quality diet leading to poor growth?

    <p>Administering nutritionally balanced feeds</p> Signup and view all the answers

    What is one of the visible signs of fish lice infestation?

    <p>A button-like structure on the body surface</p> Signup and view all the answers

    What is the recommended treatment for Trichodiniasis caused by Trichodina sp?

    <p>Formalin at 15-25 mg/l for 7 days</p> Signup and view all the answers

    Which symptom is NOT associated with Oodinasis caused by Oodinium sp?

    <p>Darkening of skin</p> Signup and view all the answers

    What treatment is suggested for Gill fluke infestation caused by Dactylogyrus sp?

    <p>Permanent bath treatment in Dipterex at 0.25-0.50 mg/l</p> Signup and view all the answers

    Which parasite causes excessive mucus production and pale gills?

    <p>Gyrodactylus sp.</p> Signup and view all the answers

    For Argulosis caused by Argulus sp., what is a recommended treatment?

    <p>Permanent bath treatment in Dipterex</p> Signup and view all the answers

    What are the symptoms associated with Anchor worm infestation by Lernaea sp?

    <p>Emaciation and necrosis at the attachment site</p> Signup and view all the answers

    How long should bath treatment in sodium chloride solution be administered?

    <p>7 days or more</p> Signup and view all the answers

    Which of the following treatments is suitable for skin fluke infestation caused by Gyrodactylus sp?

    <p>Bath treatment in Dipterex at 0.25-0.50 mg/l</p> Signup and view all the answers

    What characterizes infectious diseases in freshwater ornamental fishes?

    <p>They are caused by pathogenic organisms.</p> Signup and view all the answers

    Which of the following diseases is associated with the Koi Herpes Virus?

    <p>Koi Herpes Virus Disease (KHVD)</p> Signup and view all the answers

    What are common clinical signs of Lymphocystis disease?

    <p>Cauliflower-like nodular swellings</p> Signup and view all the answers

    What is a recommended management practice for treating infectious diseases?

    <p>Provide good quality feed</p> Signup and view all the answers

    Which infectious disease causes sunken eyes and red and white patches on the gills?

    <p>Koi Herpes Virus Disease</p> Signup and view all the answers

    What distinguishes non-infectious diseases from infectious ones in ornamental fishes?

    <p>They are related to environmental stress and nutrition.</p> Signup and view all the answers

    Which clinical sign is NOT associated with fishes suffering from Spring Viraemia of Carp Virus?

    <p>Pale blisters on the skin</p> Signup and view all the answers

    What is true regarding treatment options for viral diseases in fishes?

    <p>No effective treatment is widely available for most viral diseases.</p> Signup and view all the answers

    Study Notes

    Infectious Diseases

    Viral Diseases

    • Koi Herpes Virus Disease (KHVD): Caused by Koi Herpes Virus; characterized by gill infections, sunken eyes, and skin blisters; no effective treatment available.
    • Lymphocystis Disease: Caused by Iridovirus; notable for cauliflower-like white swellings on body and fins; separation of affected fish recommended.
    • Spring Viraemia of Carp Virus (SVCV): Caused by Rhabdovirus; symptoms include skin and gill hemorrhages, dark skin, and exophthalmia; prevention via good water quality and nutrition is crucial.

    Bacterial Diseases

    • Ulcer or Aeromoniasis: Caused by Aeromonas species; presents as skin lesions and open sores; treatment includes pond disinfection with KMnO4 at 5 mg/L.
    • Fin and Tail Rot: Caused by Aeromonas and Pseudomonas species; symptoms include whitish margins and putrefaction of fins; antibiotic treatment recommended with terramycin or sulphadiazine.
    • Columnaris Disease: Caused by Flavobacterium columnare; characterized by grayish patches and discolored fins; dip treatment in KMnO4 at 500 ppm for 2 minutes advised.
    • Mycobacteriosis: Caused by Mycobacterium fortuitum; marked by emaciation and dropsy; treated with Oxytetracycline or Nifurpirinol in bath treatments.
    • Dropsy: Caused by Aeromonas hydrophila; symptoms include distended abdomen and scale protrusion; treated with a dip in KMnO4 for 2 minutes and pond disinfection at 1 mg/L.
    • Bacterial Gill Disease: Caused by Myxobacteria; presents with necrotic gill tissues; treated with bath treatment using alkyl benzalkonium chloride at 2 mg/L for 1 hour.

    Fungal Diseases

    • Cotton Wool Disease: Caused by Saprolegnia parasitica; identified by cotton wool-like outgrowths; treated with NaCl at 3-4%, KMnO4 at 160 mg/L for 5 days, and long-term bathing in methylene blue.
    • Gill Rot: Caused by Branchiomyces species; signs include gill necrosis and discolouration; treatment involves NaCl baths and KMnO4.

    Parasitic Diseases

    • White Spot Disease: Caused by Ichthyophthirius multifilis; characterized by erratic swimming and visible white spots; treated with malachite green oxalate or sodium chloride solutions.
    • Trichodiniasis: Caused by Trichodina species; symptoms include skin darkening and excessive mucus; treated with formalin or KMnO4.
    • Oodinasis (Velvet Disease): Caused by Oodinium species; identified by gray patches on skin; treated with malachite green or formalin.
    • Gill and Skin Fluke Infestation: Caused by Dactylogyrus and Gyrodactylus species; symptoms include faded gills and thick mucus layer; treatment involves Dipterex and formalin baths.
    • Lernaeasis (Anchor Worm) Infestation: Caused by Lernaea species; exhibits emaciation and inflammation at attachment sites; treated with Dipterex and NaCl baths.
    • Argulosis (Fish Lice) Infestation: Caused by Argulus species; marked by ulcerative lesions; treatment includes prolonged baths in trichlorphon or potassium permanganate.

    Non-Infectious Diseases

    Nutritional Deficiency Diseases

    • Scoliosis and Lordosis: Caused by deficiencies in tryptophan and vitamin C, leading to spinal curvature; remedied by dietary supplementation.
    • Pin Head Disease: Resulting from protein, carbohydrate, and lipid deficiencies; characterized by poor growth and sluggish behavior; necessitates nutritionally balanced feeding.
    • Constipation: Related to imbalanced or low-quality diet; manifests as swelling and sluggishness; intervention includes feeding Daphnia as a laxative and salt treatment.

    Health Management

    • Health management in ornamental fish is critical due to high financial investments; knowledge of disease prevention is pivotal.
    • Diseases arise from interactions between host, pathogen, and environment, categorized into infectious (spread through pathogens) and non-infectious (related to individual health issues).

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    Fish Diseases PDF

    Description

    Explore the various infectious diseases affecting fish, including both viral and bacterial diseases. This quiz covers the causes, symptoms, and potential treatments for diseases like Koi Herpes Virus, Lymphocystis, and Aeromoniasis. Test your knowledge on fish health management and disease prevention.

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