1 / 61

BACTERIAL DISEASES

BACTERIAL DISEASES. Dr. BUNDIT TENGJAROENKUL. Department of Medicine Faculty of Veterinary Medicine Khon Kaen University. Fish. Diseases. Pathogens. Environment. Diseases. Diseases. Fish: Poikilothems Pathogens: Bacteria, Protozoa, Fungi Environments: Water-Soil quality, Diet,….

Download Presentation

BACTERIAL DISEASES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. BACTERIAL DISEASES Dr. BUNDIT TENGJAROENKUL Department of Medicine Faculty of Veterinary Medicine Khon Kaen University

  2. Fish Diseases Pathogens Environment Diseases

  3. Diseases • Fish: Poikilothems • Pathogens: Bacteria, Protozoa, Fungi • Environments: Water-Soil quality, Diet,… General signs • Emaciation, Stunting, Lethargy, Ascites • Exophthalmos, Corneal opacity, Hemorrhage • Erratic swimming, Gulping, Gill-Fin rots • White spot, Pale gill

  4. Bacterial Diseases Motile Aeromonas (d) Septicemia • Cause:Aeromonas hydrophila (G-, Bacillus; Flora) • + Poor water quality (Predisposing) • Transmission: Mouth, Skin (damage), Gill • Signs: • Peracute: Overnight, No/Little Sign, Congestion, • Internal organs (pale, swollen, fribble) • Acute: 1-2 days, dropsy -popped scale &ascites, exophthalmos, hemorrhage

  5. Motile Aeromonas (d) Septicemia • Signs (cont.): • Chronic:ulcers, hemorrhage, lethargy, erratic • swimming, ascites, fin-gill rots, • exophthalmos, K-Li enlarge, corneal • opacity • Latent: no signs, immune +, reservoir • * Human: diarrhoea • Isolation: BHI, TSA

  6. Motile Aeromonas (d) Septicemia • Prevention: 0.1-0.5% NaCl @ transportation • Density…appropriate • Water quality…good • Vaccine ? • Treatment: • Oxytetracyclin 55-75 mg/kg fish ppm, 7-10 d • Oxolinic acid 10 mg/kg fish ppm, 7-10 d • Amoxycillin 40-80 mg/kg fish ppm, 10 d

  7. Bacterial Diseases Furunculosis • Cause:Aeromonas salmonicida (G-, , non-motile) • Transmission: Mouth, Skin (damage), Gill • Furuncle= Necrosis + Exudate + Macrophages • Signs: • Peracute: fingerlings, dark in color, death • Acute: subadult-adult, anorexia, • hemorr. (skin-fins-gut), death

  8. Furunculosis • Signs (cont.): • Chronic: furuncles + ulcers, internal hemorr, • survivals = carriers • Predisposing causes: • Stress, Temp, Overcrowding, Trauna-wound

  9. Furunculosis • Prevention: 0.1-0.5% NaCl @ transportation • Density…appropriate • Water quality…good • Treatment: • Oxytetracyclin 75mg/kg, OID 7-10 d • Sulfamerazine 265 mg/kg , OID 14 d • Chloramphenicol 55 ppm 10 d • Furazolidone 35 ppm 20 d • Nor-, Enrofloxacin 2-3 ppm 7-10 d

  10. Bacterial Diseases Vibriosis • Vibrio (G-, motile, comma rods) “red boil, red pest” • V. anguillarum (common) • Transmission: Mouth, Skin (damage), Brooders • Signs: marine-estuarine water • Redness: Base of fins, mouth, skin, anus • Boil like lesion (s/c, m) pus • Anemia, Skin ulcer • Hemorrhage: skin, fin, gill, internal organs • Abdominal fluid, # Heart

  11. Vibriosis • Prevention : • Reducestress (Appropriatedensity) • Goodwaterquality: DO, pH, NH3, NO2-, etc. • Treatment:0.1-0.5%NaCl @ transportation • Oxytetracyclin77ppm, 10 d • Sulfamerazine265ppm3 d & 154 ppm11d • Nitrofurazone56 ppm10 d • Furanaze500-1000ppm10 d • Oxolinicacid10ppm10 d • Amoxycillin40-80 ppm10-12 d • Nor-, Enrofloxacin3-5ppm7-10 d

  12. Bacterial Diseases Columnaris Disease • Cause:Flexibacter columnaris (G- long rod; Hay-stack appearance) • Transmission: to skin-gill of freshwater fish • Signs: • Skin: mucous, change color w petechial hemorr. • -erosion-necrosis • Eye: corneal opacity • Fins: rots, petechial hemorr. • Gill: congestion, hemorr., necrosis

  13. Columnaris Disease • predisposingcauses: • low O2, NH3, handling • Prevention : • Avoidskindamage • Appropriatedensity (reducestress) • Goodwaterquality: DO, pH, NH3, NO2-, etc. • Chemicals: CuSO4 10ppm20min(500 ppm 1 min) • Treatment: • 0.1-0.5%NaCl • Furanaze1.5 ppm3hr

  14. Bacterial Diseases Yersinia ruckeri • Cause:Edwardsiella ruckeri (G-, motile, short rod) • “Enteric Redmouth Disease” • Horizontal transmission • Signs: • Lethargy, anorexia, exophthalmos • Hemorrhage (mouth, eye, base of fins, gill) • Hemorrhage (liver, gonad, bladder, m) • Spleen (swollen, friable)

  15. Yersinia ruckeri • Predisposingcauses: • Carriers (survivors) • stress, poorwaterquality • Tx:Sulfamerazine265ppm3d, 154ppm11d • OTC55ppm10 d • Prevention: • Vaccine

  16. Bacterial Diseases Edwardsiella tarda • Cause:Edwardsiella tarda (G-, motile, rod) “Emphysematous putrefactive of Catfish” • Transmission: Fece • Signs: • Lethargy, abnormal swimming • Small cutaneous ulcer deep necrotic ulcer • Deep m abscess, ascites, gill inflame • Necrotic nodules in K, Li, Spleen

  17. Edwardsiella tarda • predisposing causes: • Low temp, Density • poor water quality • Prevention : • Appropriate density (reduce stress) • Good water quality: DO, pH, NH3, NO2-, etc. • Tx: OTC 55 ppm, Oxolinic acid, Chloram.

  18. Bacterial Diseases Edwardsiella ictaluri • Cause: Edwardsiellaictaluri.(G-, motile, rod) • “Holeinthehead” • “EntericSepticemiaofCatfish, ESC” • Signs: • Anorexia, swimming (spiral) • Depigmentation, ”Chinrash” • Ulcerationinthefrontalbone • Palegill, ascites, exothalmos

  19. Edwardsiella ictaluri • Transmission: water to nose to brain • predisposing causes: • Temp, stress • Tx: OTC, Sulfonamide • Prevention: • Avoid skin damage • Appropriate density (reduce stress) • Good water quality: DO, pH, NH3, NO2-, etc.

  20. Edwardsiella ictaluri

  21. Bacterial Diseases Pseudomonas infection • Cause:Pseudomonas spp. (G-, motile, rod) • Signs: • Mass hemorrhage (mouth, opercula, ventral body) • w poor sanitation, high temp

  22. Pseudomonas infection • Prevention: • Avoid skin damage • Appropriate density (reduce stress) • Good water quality: DO, pH, NH3, NO2-, etc. • Treatment: • Erythromycin ppm, d • Amoxycillin ppm, d

More Related